3D printing and Laser Cutting of Medical Shields

[Emil Jonasson]

From Design to Mass 3D printing of Medical Shields in Three Days

Came across this on Josef Prusa's site. Given that the Covid19 pandemic is starting to hit the UK hard (and London especially) maybe we can help by making Medical Shields even if hacking together a Ventilator is a bit much at the moment?

They have released the designs online, and only 3D-printers and laser cutters are needed.

Best,

Emil

[Alexander Edwards]

Dear rLab

There is in fact an now URGENT APPEAL from local hospitals for FACE SHEILDS. (and other PPE)

"

Face protection is an urgent problem. 

We are desperate for Single use face visors (or any sort of face visors). 

"

I am in process of finding out if they can make use of carefully produced ones rapid fabricated by local teams - with the Prusa design in mind. There are other similar designs out there.

I am happy to help to refine the specification from the medical manufacturing perspective. It would be great to understand who locally is best placed to laser-cut (or otherwise rapidly produce the clear shield) and also 3D print the headband. We must have a number of local 3D print farms.

We can do this on an individual scale - for example the University has at least 2 laser cutters, plus 4-5 3D printers. We have staff who can help some with pharmaceutical manufacturing expertise. We have clinical trial suite set up for clean work, and also a food manufacture plant that could be adapted for aseptic assembly. But it would be far better to use local manufacturing sites as it will be easier to quality-control production conditions.

There will be support for the hospital/NHS with respect to procurement processes, distribution, etc.

Let me know if anyone can help, or knows who can help.

Thanks,

Al Edwards (University of Reading School of Pharmacy)

[Alex Gibson]

Hi Al

 

I have a local 3D printing business used to operating at scale.  I also have A4 acetate sheets in stock, and have been testing printing the Prusa design and a derivative based on using the A4 sheet and a standard hole punch.

 

I have a lot of printers (at least 16 of which at least 9 instantly ready, but can scale up beyond this) but am a sole owner business so I can absolutely help but will be cautious to offer sustainable support over a period of time, as this is going to be big.

 

Please call me on 0118 945 49 69 from 5pm today.

 

Cheers,

 

Alex Gibson

 

@alexgibson3d    

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/b68cde67-ad1a-41ff-8158-57e70128cc5f%40googlegroups.com.

 

---

This email has been checked for viruses by AVG antivirus software. www.avg.com

[Derek Scuffell]

I was looking at this design a couple of days ago. The visor sheet size is circa 240mmx240mm , so an A4 sheet won't quite be big enough. I've ordered some 200 micro comb-binding folders in A3 to see if they will do the job. - hopefully arriving today. 

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/b68cde67-ad1a-41ff-8158-57e70128cc5f%40googlegroups.com.

[Alex Gibson]

Same wavelength, also have the same incoming here.  Glad to know we will have good local stocks!

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/29e82b0c-ab88-45d3-ab23-2ab43ebfb5d6%40googlegroups.com.

[Emil Jonasson]

Hi Al,

If you can find this out, please let us know. I would happily get involved in organising this for the Reading area - I may only have one 3D printer but I'm working from home so could run it all day if it helps!

Alex,

We could also get the TVRRUG group involved - with most of us being home (and with out printers) we could churn out hundreds of the things if we figure out a good procedure for keeping them hygenic...

Best,
Emil  

[Alex Gibson]

Copying TVRRUG members on this discussion of 3D printing medical shields locally…

 

As Emil mentions, the crucial thing is that it’s possible to make parts that will actually be usable in a clinical setting IE sterile or able to be made so, in quantity, and FAST – we expect mass production to ramp up soon, so this is an operation that will have a short life then be disbanded, but there will be a short term gap to fill which could be life saving.

 

With any community effort there is potential for many cooks so I’ve kept my powder dry so far but this initiative from University of Reading School of Pharmacy is well placed with contacts in government and at RBH.

 

A great starting point would be to confirm how many of us have printers able to print the attached part, repeatedly with *reasonable* reliability, and are willing to loan them to be operated by others in a suitable location. 

Here are the instructions:

https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2

 

I’ve set up a Google sheet to collate info about who has what printers with what properties available – please add info here!

https://docs.google.com/spreadsheets/d/13LWV3yWP8m0KFVF7P5dm83Uhp2HIuyTj2e2a41xC2_0/edit?usp=sharing

 

You could separately email me your contact details, stored for this purpose ONLY – to me al...@alexgibson.net

This is not a commitment to do ANYTHING right now – just to check what printers are potentially available…

 

Please suggest to me any edits that should be made to the form itself.  I have left off contact details for data protection reasons and location as I think a usable printer is worth collecting anywhere locally – please let me know if you are OUTSIDE Berkshire, Oxfordshire, Hampshire, Buckinghamshire?

 

There may be other ways to contribute including maintenance, training of operators, remote or onsite support – right now just focusing on the printers we can cluster in the very near future.

 

If you also happen to have a laser cutter – please email me the specs and I can collate this too!

 

Kind regards,

 

Alex Gibson

 

@alexgibson3d    

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: reading-...@googlegroups.com [mailto:reading-...@googlegroups.com] On Behalf Of Emil Jonasson
Sent: 21 March 2020 20:25
To: rLab / Reading's Hackspace
Subject: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

Hi Al,

--

You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/14b969ed-2d5c-45fb-a6e7-1e8366e345b9%40googlegroups.com.

[Alexander Edwards]

An update: It's both clear that WHO guidance reccomends using disposable FACE SHIELD i.e. clear plastic visor as secondary protection over goggles and mask/respirator. It's also clear that local NHS has not got enough of these so many staff are working without them.

Unlike masks/respirators/ventilators that require more sophisticated engineering to get right (but are still very worthy targets), making these FACE SHIELDS can be done immediately and locally, probably at significant scale.

A major help would be to find a suitable clean and clear space for production and assembly. I am trying to find this within the University but it's not straightforward.

Several people agree that a single clinically supervised assembly location for sterililsation and distribution is vital. Anyone who can think of other locations, do so. It needs to be clean, with power supply for print farm, plenty of handwashing facilities, space to set up assembly work flow. Not obvious to me what this would be!

As soon as this location can be confirmed, we must form a core team and make sure there is a standardised production and assembly. At that point, 3D printers, plastic film, filament etc will be needed in unknown quantities. Bag sealers with supply of large bags might be ideal for packaging after sterilisation.

Distribution then needs sorting out because we can't just drop off random FACE SHIELDS at random hospitals or GP practices.

What we've seen with COVID-19 testing is that there are VERY MANY offers of help, but only a few people get the offer taken up, usually the closest or the people with equipment/reagents that happens to match the system. So, in advance, my apologies to anyone offering to help who ends up feeling their offer wasn't heard!

Also, we really hope central supplies will reach everyone very soon, so this could be something set up and then shut down very quickly, if we are lucky it will just fill a temporary gap in supply chain.

Al

On Thursday, 19 March 2020 22:54:32 UTC, Emil Jonasson wrote:

[Matthew Richards]

Do we have methods for sterilising?

Dip in acetone (in the absence of IPA which is in short supply) and then package in standard sandwich bags?

I can get acetone at volume if needs be

[Emil Jonasson]

Hi Al and Alex,

So it seems that my printer is a bit rubbish compared to others in the spreadsheet, but I'l still really like to help.

It seems to me that there are several different conversations which need to be had at once If we are going to make this happen we will need to organise ourselves a bit more. Would you all mind if I created a project on a productivity/project management site such as ClickUp? That way we can define different areas for people to work on, people can volunteer to sirt specific things out, there is a chat/forum functionality etc. It's also free for unlimited users (they just lock some Premium fetures behind a paywall, but it's great anyway).

Best,

Emil

[Alex Gibson]

All – I have attached an updated version of the Prusa headband STL from David Price – this is NOT a change to the design in any significant way. It fixes an issue where the original part does not sit flush to the build bed on all slicers on import.  THIS is the one to use for testing your machine…

 

I am going right now to pick up a stock of A4 ring binder front and rear plastic sheets – a good source of the right sort of plastic.  I’ve got acetate sheets already in stock, and another rLab member has some A3 ring binder covers either in stock or incoming.

 

Al

-          Yes, thanks for updating!  Completely agree that Face shields are the way to go.

-          I still think that if the university has a canteen area this would be ideal – many printers on many long benches, with space between them and cleanable surfaces will be good.  

-          The power requirements are not outrageous -  in terms of power density most modern offices could do the same.

-          I am asking a friend about one possible local space, will update when I’ve had the conversation.

 

Emil-

-  Thanks still for adding it! – in my opinion the TVRR machines are capable, and as we have potentially many of them, they are a known quantity.  If we are limited for space they would not be as productive as some other machines as to achieve a useful output they’d need to be run more slowly, but they are (or can be made to be) very reliable (I can fix them until they are and have many spares!!).  Unless you’ve eliminated it from yours they do have a small amount of wood in their construction – but we could quickly make alternate parts to eliminate it.

- I don’t know that we really need a PM software tool right now, but thanks for the offer!!!  Our needs are fairly simple, and right now a space to operate is a clear stumbling block.

 

I’m in touch with Andy Harris (copied) who is already printing Prusa shields on his Mark 3, he even has a laser cutter at home, but needs the sheets, which I have and will pass on to him…

 

Enzo – I saw the Decathlon face mask conversion – I have one reserved and will collect today or tomorrow morning.  Looks great.  Not sure I’d want to treat it as ‘disposable’ so cleaning options…?

 

 

 

 

Alex Gibson

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: reading-...@googlegroups.com [mailto:reading-...@googlegroups.com] On Behalf Of Emil Jonasson
Sent: 22 March 2020 10:27
To: rLab / Reading's Hackspace
Subject: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

Hi Al and Alex,

--

You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/ba77cf53-af29-44c8-ba9c-ec211bca069d%40googlegroups.com.

[Mr.G]

There's plenty of IPA in pubs, but you can't get to it ;)

Acetone at volume sounds interesting.   IPA is often converted from acetone, it should be possible the other way. It would be an interesting experiment

Best wishes

Gerald Tompsett

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/a70fb53c-b136-40e5-ac31-7cf8077fa815%40googlegroups.com.

[Matthew Richards]

Our offices on GreenPark are closed right now - we have thousands of sq meters of space available - I'm speaking to the site lead at the moment to see if we can get the ground floor meeting rooms opened up for us or the canteen which has a tonne of aircon.

Matthew

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/ba77cf53-af29-44c8-ba9c-ec211bca069d%40googlegroups.com.

[Alex Gibson]

Definitely Acetone can be used.  Do you have local stock already?  Supplies of this kind of thing are getting interrupted.  I have 1l  IPA, 2l acetone right now.   Plenty of us have similar quantities, but a bulk stock would be better!  How would you source volume? Not saying order now, just check it’s still possible to get fast.

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/CAHr2rBybpA1Z%3DRWuDB1FGxjEUa2zcdRwx2MohQypT8D-A4mkSQ%40mail.gmail.com.

[Alex Gibson]

Fantastic – similar wavelength, I’ve emailed Louize Clarke who founded GROW @ Green Park which was in one of those suites, and she has a lot of contacts with the superior landlords – and there was a whole empty wing opposite, already stripped down to metal floor plates. 

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: reading-...@googlegroups.com [mailto:reading-...@googlegroups.com] On Behalf Of Matthew Richards

Sent: 22 March 2020 11:08

To: rLab / Reading's Hackspace

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/6a77f7ce-f25d-4065-945c-2c81e13bd471%40googlegroups.com.

[Matthew Richards]

I have a good relationship with a boatyard in Cardiff - they have acetone by the barrel load

[Alexander Edwards]

Won't acetone dissolve the plastic parts?

Also not sure about safety.

Ethanol and isopropyl alcohol are more appropriate, and can be used sparingly to maximize utilisation.

Work space and staff can be sanitised using conventional products.

I have heard some NHS staff are washing and reusing such things, it seems like they really are needed.

Thanks all!

[Matthew Richards]

Acetone evaporates so quickly that a quick dip shouldnt harm PETG - I am doing a test print now and will let you know how acetone affects it.

Hazardous but I am happy to collect parts for dipping

I am NHS and we will wipe parts using Clinel wipes (https://gamahealthcare.com/products/universal-range) if they are easy to dismantle and didn't get fluids on them. We wipe everything with these, beds, defibs, suction devices, thermometers...

[Matthew Richards]

I got a director from Cisco involved, he has started a conversation with the relavant folks. I'm asking for access to either canteen or a very large meeting room.

Questions:
1. how many people MAX would we have in the building
2. what is the absolute bare minimum number of people?
3. how many 3D printers and can we do a rough power consumption calculation please (not for power used but for aircon capacity)
4. I guess 24/7 access required

Thanks

[Alex Gibson]

Hi Al,

Acetone won't dissolve PLA or PETG. It would totally dissolve ABS.

Agree that IPA is more suitable -but Acetone immersion would kill things fast, and any residue would evaporate? I think the key risk would be to the operator of the process!

Re-use is a real concern. Normally such PPE is treated as disposable - due to the risks of infection around cleaning. Can we come up with a truly safe, sure cleaning protocol?

PLA 3D printed plastic can be fully re-cycled and I have a filament extruder, and an rLAb member has a grinding machine. The advantage is that however the parts came to us, the extrusion process inherently sterilises the filament created. Again, safe protocols needed - both for processing, and for collecting the used parts - it would be separate from their normal disposal protocols. The masks should be separated into printed and sheet materials - which should be very easy and reasonable to do - but then need to be transported as hazardous waste to us, and we'd need to be able to deal with it as such!!!

Cheers,

Alex Gibson

+44 118 945 4969 @alexgibson3d 37 Royal Avenue, Reading RG31 4UR

admg consulting

edumaker limited

• Project management
• Operations & Process improvement
• 3D Printing

-----Original Message-----
From: reading-...@googlegroups.com [mailto:reading-...@googlegroups.com] On Behalf Of Alexander Edwards
Sent: 22 March 2020 11:16
To: rLab / Reading's Hackspace
Subject: Re: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/1f4f6e61-179b-4660-bea5-86cc7f745c33%40googlegroups.com.


--
This email has been checked for viruses by AVG.
https://www.avg.com

[Alex Gibson]

Hi Matthew

Any wiping based cleaning protocol is particularly hazardous with 3D printed parts –their texture traps liquids very well and they are microscopically porous, so chances of still having some virus in liquid even after a thorough wipe would be high.

 

So melting down the material at 200+ degrees C and re-extruding feels like a better approach!!

 

Actual availability of fresh material should not be a bottleneck – I have tons in stock and can get far more, fast.  I am a big fan of recycling and preventing the epic scale of waste this could be – but I think it is second order right now! Priority to SAFELY collect in the used materials to enable recycling once the production is already in full flow.

 

Do you think it’s actually feasible to introduce dedicated rubbish collection for the masks at this point?

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: reading-...@googlegroups.com [mailto:reading-...@googlegroups.com] On Behalf Of Matthew Richards
Sent: 22 March 2020 11:19
To: rLab / Reading's Hackspace
Subject: Re: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

Acetone evaporates so quickly that a quick dip shouldnt harm PETG - I am doing a test print now and will let you know how acetone affects it.

--

You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/4b1fa4ab-785f-48de-9d59-dad6748d4b4b%40googlegroups.com.

[Alex Gibson]

Canteen is good!

 

We should be following social distancing to the max – so say up to 10 people, VERY spaced apart?

 

Minimum people is two – lone working should be avoided.

 

We don’t yet know how many 3D printers – but assume around 25 (minimum 15, max – 30?)

 

Power density is NOT high.  And ideally air temperature does not want to be brought down too low.  

 

Assume 120 W on average per printer and that should be an over-estimate. 

 

In a standard office environment they should be easily within standard power allocation.  Each printer would effectively be taking the equivalent of 1 person-desk.

 

24/7 access a must.  Continuous presence of people also, which should help from a security perspective

 

Cheers.

 

Alex Gibson

 

+44 118 945 4969     @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: reading-...@googlegroups.com [mailto:reading-...@googlegroups.com] On Behalf Of Matthew Richards
Sent: 22 March 2020 11:30
To: rLab / Reading's Hackspace
Subject: Re: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

I got a director from Cisco involved, he has started a conversation with the relavant folks. I'm asking for access to either canteen or a very large meeting room.

--

You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/c1a24627-e67f-4cfe-aa08-05eb68360410%40googlegroups.com.

[Matthew Richards]

Sorry, miscommunication about the acetone use

I was thinking of dipping prior to us sending them out - make them sterile quicker than leaving them for a few days

I agree - grind and re-print is better than wiping - we could however wipe the clear shields

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/4b1fa4ab-785f-48de-9d59-dad6748d4b4b%40googlegroups.com.

[Emil Jonasson]

Alex,

Reading University has a big central canteen area which would be perfect if they let us use it.

Could we start a list of materials/suppliers which we know works? I see several of you have already bought materials for this. Links would be helpful so that we can start stocking up. I would do it but I don't know what you have bought :S

Regarding PM tools, that is fair enough. I will prepare one for use if we deem it necessary/useful. I can quickly see the Google group thread reaching its limit if we get 10 or so people involved, and that way we could invite people not in RLab or TVRRUG groups as well.

Best,
Emil

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/ba77cf53-af29-44c8-ba9c-ec211bca069d%40googlegroups.com.

[Alex Gibson]

Al is already talking to the University management about a few areas J  Do you have direct contacts also?

 

Green Park is another good option if we don’t get a response fast enough.

 

I have enough PLA to supply 30 printers for 2 days printing at least, and can get a ton via Filamentive by Tuesday if needed!  We will not run out of PLA (or PETG)

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/78115c28-a624-4947-9050-1c3e79dcc601%40googlegroups.com.

[Alexander Edwards]

My comment about re use was just to show how desperately short people are.

Not suggesting re use at all.

These will go into biohazard waste with all the PPE. Hospital waste stream. Absolutely no return for re use sorry.

Sounds wasteful, but the whole process is dependent on large volumes of single use disposables, hence the supply problems.

Al

[Matthew Richards]

Another suggestion to get the parts sterilised quicker - could we rig up a few https://www.bltdirect.com/germicidal-t5-t8-specialist tubes and expose the parts for 20 mins? I am happy to buy the parts if someone could help create a rig

[Alex Gibson]

YES! 

 

I have several Luminaires which could be populated with these.  Put the lot in a tent to protect people, and that is a great additional sterilisation step.

 

I will check what bulb size my luminaires take.

 

I have already designed a 3d printed mount that attaches them to a wooden beam, so super simple to rig that up, throw a (new) tarp over it all and get running.

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: reading-...@googlegroups.com [mailto:reading-...@googlegroups.com] On Behalf Of Matthew Richards
Sent: 22 March 2020 12:17
To: rLab / Reading's Hackspace
Subject: Re: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

Another suggestion to get the parts sterilised quicker - could we rig up a few https://www.bltdirect.com/germicidal-t5-t8-specialist tubes and expose the parts for 20 mins? I am happy to buy the parts if someone could help create a rig

--

You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/f4b22766-9296-4388-9a31-b42acc042220%40googlegroups.com.

[Matthew Richards]

WE HAVE LOCATION (in principal)

Cisco GPK are in principal offering their ground floor large meeting room with power, security etc

Can everyone join a WebEx call at 13:00 to discuss next steps?

https://go.webex.com/meet/matthric

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/f4b22766-9296-4388-9a31-b42acc042220%40googlegroups.com.

[Richard Ibbotson]

Steve already made some good comments on the suitability of UV sterilisation on the thread I started here for a UV Steriliser Cabinet. I would guess such a steriliser would be OK for the sheet materials but not so good for more complex 3D printed parts.

3D printed parts will be difficult to sterilise by any merging due to there porosity. I question the need for post production sterilisation of the product if material used and production facility can be maintained in a sterile state.

Sent via Richard's Phone

On 22 Mar 2020, at 12:24, Alex Gibson <al...@alexgibson.net> wrote:



To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/011c01d60044%24b6254400%24226fcc00%24%40alexgibson.net.

[Richard Ibbotson]

On the packaging and maybe a possible contact to supplier if sterile PETG sheet in quantity?
https://polypluspackaging.co.uk/

[Richard Ibbotson]

Maybe some help here for setting up a sterile manufacturing space?
https://www.rssl.com/

[Alex Gibson]

Excellent... do they produce suitable zip-lock bags to fit a fully complete face shield do you think?

Alex Gibson

+44 118 945 4969 @alexgibson3d 37 Royal Avenue, Reading RG31 4UR

admg consulting

edumaker limited

• Project management
• Operations & Process improvement
• 3D Printing

-----Original Message-----
From: 'Richard Ibbotson' via rLab / Reading's Hackspace [mailto:reading-...@googlegroups.com]
Sent: 22 March 2020 12:49
To: rLab / Reading's Hackspace
Subject: Re: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/2e4d5a09-00a9-462b-aaad-53debf2b598b%40googlegroups.com.


--
This email has been checked for viruses by AVG.
https://www.avg.com

[daprigoo]

As far as I can tell you need three elements;

- The "fixed" version of Alex's face shield

- The "bottom_reinforcement.stl" from Prusa's original fileset

Combined these took 2h30m on my Prusa Mk3 with .3 layers, 3 perimeters and PLA. PET-G should take the same amount of time, I would probably speed things up after the first couple of layers to shorten the run.

You also need the stencil to cut the holes (normal A4 punches are not spaced correctly);

- https://www.prusaprinters.org/prints/26154-stencils-for-protective-face-shield-work-in-progre

this is designed for drilling 0.5mm acetate while presentation acetates could simply be punched. Unfortunately the holes don't match any paper punches I have so it will need to be a case of stacking a few then drilling.

david

--

---
You received this message because you are subscribed to the Google Groups "TVRepRapUG" group.
To unsubscribe from this group and stop receiving emails from it, send an email to tvreprapug+...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/tvreprapug/00a301d60038%249d064250%24d712c6f0%24%40alexgibson.net.

[Richard Ibbotson]

If the original Prusa mask uses 500 micron PETG sheet and we are looking at presentation acetate which I guess is significantly thinner. Do we have any idea on the comparative suitability to tasks, comfort, and safety?

 

Also does the mask fit into an A4 sheet, I thought someone said it was a bit bigger?

 

Will the parts fit into a 1Gallon Ziploc food storage bag? If not what size bag is required?

 

Thanks,

Richard

[Alex Gibson]

Good news is it appears we have a suitable venue at Green Park…!

 

Please add to the Google sheet any machines you’d be willing for us to operate there?

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: tvrep...@googlegroups.com [mailto:tvrep...@googlegroups.com] On Behalf Of ETJonasson
Sent: 22 March 2020 14:41
To: TVRepRapUG
Subject: Re: [TVRepRapUG] RE: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

Hi Malcolm,

 

I didn't mean to rubbish the TVRRUG designs, they are excellent. My printer is one which I built separately and then only added on the OMC/Phoenix boards from TVRRUG, the rest is a standard-ish Prusa mendel from about 2014. The axis travel is very limited, especially in Y, but this could all be fixed of course.

 

Emil

Den söndag 22 mars 2020 kl. 11:53:59 UTC skrev Malcolm Napier:

Finding one or more empty canteen/kitchen areas seems to be a good target.

 

Would unused commercial kitchen spaces (maybe associated with the canteen) be a better option? (Stainless steel surfaces, designed for hygeine, etc.)

 

Is Reading College on Kings Road closed? Maybe they train chefs and have a stainless steel "classroom" that is currently not being used at present.

 

Emil, The TVRRUG Prusa I2 is a decent, reliable printer. The Mendel90 that I have offered, is an upgrade that mainly increases the print volume. Remember the story of the tortoise and the hare....

 

 

 

 

 

 

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/ba77cf53-af29-44c8-ba9c-ec211bca069d%40googlegroups.com.

 

---

This email has been checked for viruses by AVG antivirus software. www.avg.com

 

--

---
You received this message because you are subscribed to the Google Groups "TVRepRapUG" group.
To unsubscribe from this group and stop receiving emails from it, send an email to tvrep...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/tvreprapug/00a301d60038%249d064250%24d712c6f0%24%40alexgibson.net.

--

---
You received this message because you are subscribed to the Google Groups "TVRepRapUG" group.
To unsubscribe from this group and stop receiving emails from it, send an email to tvreprapug+...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/tvreprapug/50caccb5-8321-43dc-9a3e-6cfcec01cb6b%40googlegroups.com.

[Emil Jonasson]

We should get the word out to all TVRRUG people - Malcolm, could you please put the word out with people in addation to us posting in the Google Group?

Best,
Emil

To view this discussion on the web, visit https://groups.google.com/d/msgid/tvreprapug/50caccb5-8321-43dc-9a3e-6cfcec01cb6b%40googlegroups.com.

[Alex Gibson]

Very awesome Andy – and I love the colour J

 

Al is heading into Rymans to buy up their stock of comb binder covers…

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: Andy [mailto:an...@thirtover.com]
Sent: 22 March 2020 14:58
To: daprigoo; tvrep...@googlegroups.com; Alex Gibson; reading-...@googlegroups.com
Subject: Re: [TVRepRapUG] RE: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

Hi there.

 

   I have successfully made two full versions of the Prusa RC2 face shield with PET visor sheets.

 

   I have three more frames left and awaiting more visor sheet.

 

 

I have these printers:

 

    Prusa i3 Mk3

    Prusa Mini

    ADMG Zedmaker Mini  -- which will probably go to Alex Gibson for management.

 

   I believe the first two printers could could output 6 per day.

 

Regards

 

 

Andy

[Emil Jonasson]

Hi all,

Could we please have a volunteer ot two who is happy to rent and/or drive a van to collect Alex's Printers and take them to Green Park on Monday? If anyone has a van which can be used free of charge that is of course even better.

Many thanks,

Emil

[Richard Ibbotson]

If you can source PETG sheet with protective film both sides like Prusa use and a sterilised laser cutter, the I would have though that sterilisation of that component in not needed. Maybe beg or borrow a new clean laser cutter. Trotec, Gravigraph, Epilog, HPC, might be able to supply one.

[Robyn Wimshurst]

Do you need more machines I can have a call around with some extra info?

Also nail bars are closed plenty of acetone in movable amounts

> On 22 Mar 2020, at 6:31 pm, 'Richard Ibbotson' via rLab / Reading's Hackspace <reading-...@googlegroups.com> wrote:
>
> If you can source PETG sheet with protective film both sides like Prusa use and a sterilised laser cutter, the I would have though that sterilisation of that component in not needed. Maybe beg or borrow a new clean laser cutter. Trotec, Gravigraph, Epilog, HPC, might be able to supply one.
>

> --
> You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

> To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/d166ec68-fb1d-475b-8032-381d1e304291%40googlegroups.com.

[Emil Jonasson]

Hi Robyn,

If you want to volunteer machines you can fill in the Spreadsheet above https://docs.google.com/spreadsheets/d/13LWV3yWP8m0KFVF7P5dm83Uhp2HIuyTj2e2a41xC2_0/edit?usp=sharing O

Or if you want to send round to lots of people then use the Google Form I have created:  https://docs.google.com/forms/d/e/1FAIpQLSesMIgIcxTn76_fLhgVmz-uSVSgVJRvJtxCgC_tajPEFfo6bA/viewform?usp=sf_link

Best,

Emil

Den söndag 22 mars 2020 kl. 20:31:46 UTC skrev Robyn Wimshurst:

Do you need more machines I can have a call around with some extra info?

Also nail bars are closed plenty of acetone in movable amounts

> On 22 Mar 2020, at 6:31 pm, 'Richard Ibbotson' via rLab / Reading's Hackspace <reading-...@googlegroups.com> wrote:
>
> If you can source PETG sheet with protective film both sides like Prusa use and a sterilised laser cutter, the I would have though   that sterilisation of that component in not needed. Maybe beg or borrow a new clean laser cutter. Trotec, Gravigraph, Epilog, HPC, might be able to supply one.
>
> --
> You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

> To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

[Robyn Wimshurst]

Heya

checked form 

What do you mean one for later?

Have you tested positive for COVID-19 and been confirmed fully cured? (One for later!) *

Will this work as a post thinking for Facebook to business parks and rich Marlow people will also look for 3d print shops!

[

3D Printers + Help the NHS

Do you have a good quality 3D printer that you would be willing to LEND an initiative to make face shields for the NHS. Manufacture scale production should be ready soo. However until then, a group which is linked to Reading University and RLab (Reading Hackspace) are with the supervision of government and NHS 3D printing face shields.

The Reading based group are getting a lot 3D printers together and producing these face masks for the NHS. Design of the face shields has been finalised. If you can Lend your Machine please start with the form here.

https://docs.google.com/forms/d/e/1FAIpQLSesMIgIcxTn76_fLhgVmz-uSVSgVJRvJtxCgC_tajPEFfo6bA/viewform?usp=sf_link

Let humans be faster than the Virus!

(Insert green visor pic)

]

On 22 Mar 2020, at 9:03 pm, Emil Jonasson <etjon...@gmail.com> wrote:

https://docs.google.com/forms/d/e/1FAIpQLSesMIgIcxTn76_fLhgVmz-uSVSgVJRvJtxCgC_tajPEFfo6bA/viewform?usp=sf_link 

[Robyn Wimshurst]

Hi 

Sorry edited

3D Printers + Help the NHS 

Do you have a good quality 3D printer that you would be willing to LEND an initiative called Reading Covid19 PPE Factory for the production of Plastic Face Shields for use by the NHS?

Manufacture scale production should be ready soon. However, until then, a group which is linked to Reading University and RLab (Reading Hackspace) are with the supervision of government and NHS 3D printing face shields. 

The Reading based group are getting a lot of 3D printers together and producing these face masks for the NHS. Design of the face shields has been finalised. If you can Lend your Machine please start with the form here. 

https://docs.google.com/forms/d/e/1FAIpQLSesMIgIcxTn76_fLhgVmz-uSVSgVJRvJtxCgC_tajPEFfo6bA/viewform?usp=sf_link

[Emil Jonasson]

Sorry Robyn (the "one for later") was a typo.

Your post looks good, please share this!

[Robyn Wimshurst]

How can I show people this is not a scam?

On 23 Mar 2020, at 9:59 am, Emil Jonasson <etjon...@gmail.com> wrote:

Sorry Robyn (the "one for later") was a typo.

Your post looks good, please share this!

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/570c13e4-d690-45d2-8c36-68f2f7600a1f%40googlegroups.com.

[Mr.G]

I'm quite worried that although well intentioned there is no one overseeing  / peer reviewing these solutions.  I'd like to see direction from someone in Government  / Chief Scientific Officer 

Here is a list of the people involved
https://www.gov.uk/government/groups/chief-scientific-advisers 

 

Best wishes

Gerald Tompsett

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/05D9E0CD-238E-4839-98F0-39C1BA9543D4%40gmail.com.

[Matthew Richards]

Hi Gerald,

We have clinical oversight and are in direct contact with both OUH and RBH as well as professionals in the clinical manufacturing industry.

To the question about proving it is not a scam, completely understandable - I am an Engineering lead at Cisco; anyone is welcome to come to me directly we any questions matt...@cisco.com

Thanks

Matthew

On Monday, 23 March 2020 17:56:38 UTC, Mr.G wrote:

I'm quite worried that although well intentioned there is no one overseeing  / peer reviewing these solutions.  I'd like to see direction from someone in Government  / Chief Scientific Officer 

Here is a list of the people involved
https://www.gov.uk/government/groups/chief-scientific-advisers 

 

Best wishes

Gerald Tompsett

On Mon, 23 Mar 2020 at 17:26, Robyn Wimshurst <roby...@gmail.com> wrote:

How can I show people this is not a scam?

On 23 Mar 2020, at 9:59 am, Emil Jonasson <etjon...@gmail.com> wrote:

Sorry Robyn (the "one for later") was a typo.

Your post looks good, please share this!

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/570c13e4-d690-45d2-8c36-68f2f7600a1f%40googlegroups.com.

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

[Emil Jonasson]

Regarding showing people it's not a scam, we will need to get some stuff up and running first.  At the moment getting more printers is not is not critical anyway, we have managed to source around 30 printers from two local 3d printing companies and  are working on getting the space for them sorted and proper procedures put in place for hygene etc. with NHS involvement. If people do want to volunteer their printers then the spreadsheet and Google form is the best way.

Den måndag 23 mars 2020 kl. 17:26:02 UTC skrev Robyn Wimshurst:

How can I show people this is not a scam?

On 23 Mar 2020, at 9:59 am, Emil Jonasson <etjon...@gmail.com> wrote:

Sorry Robyn (the "one for later") was a typo.

Your post looks good, please share this!

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

[Robyn Wimshurst]

Hi

Thanks all. If you need any help from afar just let me know. I have posted in the surrounding area so we can see what happens with the form. 

Seeing as you are doing one offs and bed sizes differ remember that head sizes differ too so might want to make some bigger and some smaller. I know from my personal tiny head experience!

Thank you for doing this guys. 

Kind regards

Robyn

On 23 Mar 2020, at 6:10 pm, Emil Jonasson <etjon...@gmail.com> wrote:



To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/6d90abb7-1186-44da-8c72-d1f9e72e0d2d%40googlegroups.com.

[Robyn Wimshurst]

Heya 

Anyone have a moment to write a post about this on Our website might help people trust it.

Kind regards

Robyn

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/6d90abb7-1186-44da-8c72-d1f9e72e0d2d%40googlegroups.com.

[Julian Warren]

A friend in the US shared a story about the Maker Nexus in California working to tackle the same problem.

They seem to have gone for a slightly different design with a domed top.  It might be worth getting a view on whether their design is superior or just more complicated.

Details are available from the Maker Nexus - 3D printed face shields wiki page.

Julian.

[Emil Jonasson]

Morning all, we could really use your help. We have the 3D printing in hand, and have sourced a local supplier of plastic bags, but we are struggling to find a supplies of clear plastic sheets (unfortunately A4 overhead won't really cut it).

Does anyone know of a local company which sells clear plastic between 0.5mm and 1mm thick?

Best,

[Emil Jonasson]

Hi Robyn, what website is that? Let me know and I can put something together.

Den måndag 23 mars 2020 kl. 19:24:50 UTC skrev Robyn Wimshurst:

Heya 

Anyone have a moment to write a post about this on Our website might help people trust it.

Kind regards

Robyn

On 23 Mar 2020, at 6:10 pm, Emil Jonasson <etjon...@gmail.com> wrote:

Regarding showing people it's not a scam, we will need to get some stuff up and running first.  At the moment getting more printers is not is not critical anyway, we have managed to source around 30 printers from two local 3d printing companies and  are working on getting the space for them sorted and proper procedures put in place for hygene etc. with NHS involvement. If people do want to volunteer their printers then the spreadsheet and Google form is the best way.

Den måndag 23 mars 2020 kl. 17:26:02 UTC skrev Robyn Wimshurst:

How can I show people this is not a scam?

On 23 Mar 2020, at 9:59 am, Emil Jonasson <etjon...@gmail.com> wrote:

Sorry Robyn (the "one for later") was a typo.

Your post looks good, please share this!

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/570c13e4-d690-45d2-8c36-68f2f7600a1f%40googlegroups.com.

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/6d90abb7-1186-44da-8c72-d1f9e72e0d2d%40googlegroups.com.

[Robyn Wimshurst]

I was thinking of using the rlab website and put up the same Facebook post with a couple of pictures. 

Rummaging around on the internet you might be interested to look at these when you have a moment. 

Facebook Groups 

UK COVID-19 Open Source & DIY

Medical Supplies

Open Source COVID19 Medical Supplies

Website 

https://national3dprintingsociety.co.uk/

I will check one place for plastic sheet and then have to do work got a bit distracted yesterday 

Robyn

On 24 Mar 2020, at 08:55, Emil Jonasson <etjon...@gmail.com> wrote:



To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/a69672eb-7f8b-45ea-a858-e59fdccd96bd%40googlegroups.com.

[Iain Farquhar]

Hi Emil, What was the issue with the A4 overheads? Was it too thin/thick? 

[Erica Calogero]

Hi there,

My name is Erica and I'm from the London Hackspace. I would be happy to help your group produce some face shields. I've ordered a pack of thse from amazon:

https://www.amazon.co.uk/gp/product/B00W1JAU6C/ref=ppx_yo_dt_b_asin_title_o05_s01?ie=UTF8&psc=1 

They're made from PVC, but they are tough and thicker than OHP sheets.

 I have no access to 3d printers or laser cutterss though because our Hackspace is shut down for thee lock down.

I've already reached out to a couple of doctors though, who say that there is interest in their respective fields (GP and psychiatry, but also potentially a link to A&E doctors too)....

Can you help? What is your production capacity? Or what do you think it will be? Do you need to sell the masks? If so what will be the price? Can you donate some? If so how many and when?

Looking forward to helping out in whichever ways I can.

Best,

Erica.  

[Steve Rodway]

Just a reminder that PVC cannot be safely cut on the laser, so if you
want to use PVC for the shield you'll need to find some other way to cut
to size. If you need to use the laser, polystyrene is suitable and can
be had in clear sheets.

Steve

> <https://blog.prusaprinters.org/from-design-to-mass-3d-printing-of-medical-shields-in-three-days/#_ga=2.160132926.2043688849.1584658123-848654561.1584658123>
>
> <https://cdn.blog.prusaprinters.org/wp-content/uploads/2020/03/image7-1024x575.jpg>

>
>
> Came across this on Josef Prusa's site. Given that the
> Covid19 pandemic is starting to hit the UK hard (and London
> especially) maybe we can help by making Medical Shields even
> if hacking together a Ventilator is a bit much at the moment?
>
> They have released the designs online, and only 3D-printers
> and laser cutters are needed.
>
> Best,
> Emil
>

> --
> You received this message because you are subscribed to the Google
> Groups "rLab / Reading's Hackspace" group.
> To unsubscribe from this group and stop receiving emails from it, send

> an email to reading-hacksp...@googlegroups.com
> <mailto:reading-hacksp...@googlegroups.com>.

> To view this discussion on the web, visit

> https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com
> <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer>.

[Erica Calogero]

Oh yes, I forgot. However, maybe there's a design that can use a single A4 sheet without cutting?

It would be great to speed up manufacture.

Kind regards,

Erica.

> an email to reading-...@googlegroups.com
> <mailto:reading-hackspace+unsub...@googlegroups.com>.

[Mr.G]

Steve 

Is Silicon latex  neoprene rubber suitable for laser cutting?
Asking for a friend at another place with a laser cutter. he wants to cut a matrix of small holes in sheet that will pass air but not water. 

Best wishes

Gerald Tompsett

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/5E7C3A6A.6030809%40legionelectronics.co.uk.

[Steve Rodway]

Not sure exactly what material you're referring to as there's quite a
mix of terms there....

Silicone rubbers = Not recommended but may be possible, will produce
abrasive and hazardous dusts.

Natural Latex = Will probably smell pretty terrible and the cut may not
be great but not hazardous to the machine or operator so long as fumes
are allowed to clear well

Neoprene(polychoroprene) = Not recommended, contains chlorine, not as
much as PVC but still may be harmful to both machine and operator. Some
things called Neoprene are actually foamed polyisoprene which is usually
safe to cut so long as fumes are allowed to clear but still not
recommended unless you know for sure what the composition is

Rubber generally = Laser rated rubbers are available, others will give
mixed results depending on exact composition.

As with all materials watch closely for quality of cut and fire as for
some materials plasticizes and additives may make normally safe
materials into fire hazards

Steve

Mr.G wrote:
> Steve
> Is Silicon latex neoprene rubber suitable for laser cutting?
> Asking for a friend at another place with a laser cutter. he wants to
> cut a matrix of small holes in sheet that will pass air but not water.
>
> Best wishes
>
> Gerald Tompsett
>
>
> On Thu, 26 Mar 2020 at 05:15, Steve Rodway

> <St...@legionelectronics.co.uk <mailto:St...@legionelectronics.co.uk>>

> <mailto:reading-hackspace%2Bunsu...@googlegroups.com>
> > <mailto:reading-hacksp...@googlegroups.com
> <mailto:reading-hackspace%2Bunsu...@googlegroups.com>>.

> > To view this discussion on the web, visit
> >
> https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com
> >
> <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer
> <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer>>.
>
> --
> You received this message because you are subscribed to the Google
> Groups "rLab / Reading's Hackspace" group.
> To unsubscribe from this group and stop receiving emails from it,
> send an email to reading-hacksp...@googlegroups.com

> <mailto:reading-hackspace%2Bunsu...@googlegroups.com>.

> To view this discussion on the web, visit

> https://groups.google.com/d/msgid/reading-hackspace/5E7C3A6A.6030809%40legionelectronics.co.uk.

>
> --
> You received this message because you are subscribed to the Google
> Groups "rLab / Reading's Hackspace" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to reading-hacksp...@googlegroups.com
> <mailto:reading-hacksp...@googlegroups.com>.
> To view this discussion on the web, visit

> https://groups.google.com/d/msgid/reading-hackspace/CAHr2rBy2kkjNDYZOZpRfL%2BL24nDy6YYj6EyoebHqMo86SWK4Kw%40mail.gmail.com
> <https://groups.google.com/d/msgid/reading-hackspace/CAHr2rBy2kkjNDYZOZpRfL%2BL24nDy6YYj6EyoebHqMo86SWK4Kw%40mail.gmail.com?utm_medium=email&utm_source=footer>.

[Sto Forest]

Hi I'm Matt from Surrey and Hampshire MakerSpace over in Guildford, great initiative guys!

Just for information, we've supplied some 3D printed parts for the Prusa Visor to a local GP surgery.

In the absence of other material they are improvising the face shield from large soda bottles which are made from PET. Not so useful for volume production or laser cutting unless you can find a good way to get them to lay flat of course.

>     > an email to reading-...@googlegroups.com
>     <mailto:reading-hackspace%2Bunsu...@googlegroups.com>
>     > <mailto:reading-hackspace+unsub...@googlegroups.com

>     <mailto:reading-hackspace%2Bunsu...@googlegroups.com>>.
>     > To view this discussion on the web, visit
>     >
>     https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com
>     >
>     <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer
>     <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer>>.
>
>     --
>     You received this message because you are subscribed to the Google
>     Groups "rLab / Reading's Hackspace" group.
>     To unsubscribe from this group and stop receiving emails from it,

>     send an email to reading-...@googlegroups.com

>     <mailto:reading-hackspace%2Bunsu...@googlegroups.com>.
>     To view this discussion on the web, visit
>     https://groups.google.com/d/msgid/reading-hackspace/5E7C3A6A.6030809%40legionelectronics.co.uk.
>
> --
> You received this message because you are subscribed to the Google
> Groups "rLab / Reading's Hackspace" group.
> To unsubscribe from this group and stop receiving emails from it, send

> an email to reading-...@googlegroups.com
> <mailto:reading-hackspace+unsub...@googlegroups.com>.

[Mr.G]

I've since found this and it looks like it may be suitable. 
https://www.par-group.co.uk/sealing-and-jointing/rubber-sheeting/latex-rubber-sheeting/# 

 

Best wishes

Gerald Tompsett

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/5E7CA0E7.2040908%40legionelectronics.co.uk.

[Steve Rodway]

Can't comment on the cut quality as natural latex can be quite variable,
expect a charred edge but you can probably sand that off. Avoid the
"Heat Resistant" grade as it'll give off toxic fumes when cut

Steve

Mr.G wrote:
> I've since found this and it looks like it may be suitable.
> https://www.par-group.co.uk/sealing-and-jointing/rubber-sheeting/latex-rubber-sheeting/#
>
>
> Best wishes
>
> Gerald Tompsett
>
>
> On Thu, 26 Mar 2020 at 12:32, Steve Rodway

> <St...@legionelectronics.co.uk <mailto:St...@legionelectronics.co.uk>>

> <mailto:St...@legionelectronics.co.uk

> > <mailto:reading-hackspace%2Bunsu...@googlegroups.com
> <mailto:reading-hackspace%252Buns...@googlegroups.com>>
> > > <mailto:reading-hacksp...@googlegroups.com
> <mailto:reading-hackspace%2Bunsu...@googlegroups.com>
> > <mailto:reading-hackspace%2Bunsu...@googlegroups.com
> <mailto:reading-hackspace%252Buns...@googlegroups.com>>>.

> > > To view this discussion on the web, visit
> > >
> >
> https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com
> > >
> >
> <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer
> <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer>
> >
> <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer
> <https://groups.google.com/d/msgid/reading-hackspace/8db345c9-ad6b-4252-9515-82406e329907%40googlegroups.com?utm_medium=email&utm_source=footer>>>.
> >
> > --
> > You received this message because you are subscribed to the Google
> > Groups "rLab / Reading's Hackspace" group.
> > To unsubscribe from this group and stop receiving emails from it,
> > send an email to
> reading-hacksp...@googlegroups.com
> <mailto:reading-hackspace%2Bunsu...@googlegroups.com>

> > <mailto:reading-hackspace%2Bunsu...@googlegroups.com
> <mailto:reading-hackspace%252Buns...@googlegroups.com>>.

> > To view this discussion on the web, visit
> >
> https://groups.google.com/d/msgid/reading-hackspace/5E7C3A6A.6030809%40legionelectronics.co.uk.
> >
> > --
> > You received this message because you are subscribed to the Google
> > Groups "rLab / Reading's Hackspace" group.
> > To unsubscribe from this group and stop receiving emails from it, send
> > an email to reading-hacksp...@googlegroups.com

> <mailto:reading-hackspace%2Bunsu...@googlegroups.com>
> > <mailto:reading-hacksp...@googlegroups.com
> <mailto:reading-hackspace%2Bunsu...@googlegroups.com>>.
> > To view this discussion on the web, visit
> >

> https://groups.google.com/d/msgid/reading-hackspace/CAHr2rBy2kkjNDYZOZpRfL%2BL24nDy6YYj6EyoebHqMo86SWK4Kw%40mail.gmail.com
> >
> <https://groups.google.com/d/msgid/reading-hackspace/CAHr2rBy2kkjNDYZOZpRfL%2BL24nDy6YYj6EyoebHqMo86SWK4Kw%40mail.gmail.com?utm_medium=email&utm_source=footer

> <https://groups.google.com/d/msgid/reading-hackspace/CAHr2rBy2kkjNDYZOZpRfL%2BL24nDy6YYj6EyoebHqMo86SWK4Kw%40mail.gmail.com?utm_medium=email&utm_source=footer>>.
>
> --
> You received this message because you are subscribed to the Google
> Groups "rLab / Reading's Hackspace" group.
> To unsubscribe from this group and stop receiving emails from it,

> send an email to reading-hacksp...@googlegroups.com

> <mailto:reading-hackspace%2Bunsu...@googlegroups.com>.
> To view this discussion on the web, visit

> https://groups.google.com/d/msgid/reading-hackspace/5E7CA0E7.2040908%40legionelectronics.co.uk.

>
> --
> You received this message because you are subscribed to the Google
> Groups "rLab / Reading's Hackspace" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to reading-hacksp...@googlegroups.com
> <mailto:reading-hacksp...@googlegroups.com>.
> To view this discussion on the web, visit

> https://groups.google.com/d/msgid/reading-hackspace/CAHr2rByUxi%3DLsX_NJ6gDiAJZk5m5i-DQZ53mU02u%2Bra4756EOA%40mail.gmail.com
> <https://groups.google.com/d/msgid/reading-hackspace/CAHr2rByUxi%3DLsX_NJ6gDiAJZk5m5i-DQZ53mU02u%2Bra4756EOA%40mail.gmail.com?utm_medium=email&utm_source=footer>.

[Emil Jonasson]

Hi all, I'm trying to get hold of Ken Newsham, he's volunteered some printers but he put in an incorrect phone number... if anyone knows him please ask him to email me ASAP! (etjon...@gmail.com)

Den torsdag 19 mars 2020 kl. 22:54:32 UTC skrev Emil Jonasson:

From Design to Mass 3D printing of Medical Shields in Three Days

[Keegan Neave]

I have a colleague based in Tadley with a 3d printer he'd like to lend for the project if more are still needed?  What is the best way to get him in touch with the right people to arrange collection/delivery please?

[Alex Gibson]

Yes please Keegan!

 

Can you find the Google Sheet link buried a bit further down this email chain?  If so could you ask him to kindly fill it and email me his contact details al...@alexgibson.net and we can get in touch with him to arrange safe delivery/collection!

 

Today we added to the farm the two rLab printers, my very first RepRap 3D printer and we are now over 40 printers strong!  We have a team of volunteers running them 24/7 so the production is over 200/day now.  That is complete face shields as we have over 900 visors in stock already and the instructions and bagging of those running ahead of the 3D prints J

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

--

You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/6d77e494-4bce-42a7-a694-fd30532d89e2%40googlegroups.com.

 

---

This email has been checked for viruses by AVG antivirus software. www.avg.com

[Senake]

In case you hadn't seen it...this looks like a good design. Face shield made from a lemonade bottle - 

Build your own face mask and respirator from a soda bottle - https://www.treehugger.com/sustainable-product-design/build-your-own-face-mask-and-respirator-empty-soda-bottles.html

On Thu, 19 Mar 2020, 22:54 Emil Jonasson, <etjon...@gmail.com> wrote:

From Design to Mass 3D printing of Medical Shields in Three Days

Came across this on Josef Prusa's site. Given that the Covid19 pandemic is starting to hit the UK hard (and London especially) maybe we can help by making Medical Shields even if hacking together a Ventilator is a bit much at the moment?

They have released the designs online, and only 3D-printers and laser cutters are needed.

Best,

Emil

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/be8c9b77-6f69-4576-94ed-45a15aed2ca3%40googlegroups.com.

[Richard Ibbotson]

I do have a concern over the treehugger design. My concern is about the added dead volume which the mask presents. Typical tidal breath volumes are of the order of 500ml. This mask looks like it presents a significant additional volume before restrictions.
I understand there are two consequential risks, not enough oxygen and too much CO2. Both are independent risks due to hypoxia and acidosis.
My suggestion is to test the design using both oxygen sensors and capnograph CO2 sensors under a range of usage conditions. This should not be too impossible.
Until this is done I would stick with N95 masks else cloth masks, plus a visor if possible

[Robyn Wimshurst]

Hi can you help this is a post on fb?

[Richard Ibbotson]

https://coronavirustechhandbook.com/home
New resource.

[Emil Jonasson]

Hi Robyn, have you got any more information? Ask her to email faces...@cisco.com with her request of the is local to Reading.

[Emil Jonasson]

Result! Please see the Cisco press release below, we have now made over 1000 Faceshields and distributed them to local NHS users.

https://gblogs.cisco.com/uki/uniting-passion-and-skills-to-help-support-health-workers/

[Alex Gibson]

…and a good chunk of those face shield parts are being printed on the rLab Ultimakers – here seen on ‘Ultimaker Alley’, just part of the farm, along with several friends from Cisco, Creat3D, Kendrick School and Handy Dan’s 3D Prints!

 

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: reading-...@googlegroups.com [mailto:reading-...@googlegroups.com] On Behalf Of Emil Jonasson
Sent: 07 April 2020 20:12
To: rLab / Reading's Hackspace
Subject: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

Result! Please see the Cisco press release below, we have now made over 1000 Faceshields and distributed them to local NHS users.

--

You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/f04687bd-a934-4f2e-ba30-4f6a28ff17e1%40googlegroups.com.

[Andy]

Massive congratulations to you all, most impressive.

The article mentions the process documentaion - is that online somewhere?
Any official approval from NHS?

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/031a01d60d11%246821a990%243864fcb0%24%40alexgibson.net.

[Alex Gibson]

Process documentation has been shared with NHS staff, who need to approve to use the parts, and another 3D print farm to assist them coming up to same risk averse level.

 

We are actively reviewing the docs with a view to publishing them ASAP, just needs to be made more generic.

 

Instead of being obsolete it seems we still have a growing job to do!

 

Anyone know a friendly contact at an injection moulding specialist?

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/7c87270c-9f87-01fe-9fcd-c2b1f833187d%40richmondmakerlabs.uk.

[Martyn Henderson]

Hi Everyone.

 

Firstly I just wanted to say what an amazing job you are all doing here!

 

I'm a volunteer with Print For Victory - https://printforvictory.org/

Facebook Group: https://www.facebook.com/groups/215268666490874/

 

We are a UK wide group started by a group of volunteers in West Berkshire. We are focussing primarily on providing face shields for primary care workers - GP surgeries, pharmacies, care homes, midwives, district nurses, funeral homes etc. We also have a number of much bigger requests from hospitals - including Royal Berkshire Hospital.

 

We currently have over 450 volunteer Printers nationwide including businesses and commercial printers and requests for over 3000+ face shields. As you can imagine those numbers are growing rapidly every day.

 

As much as possible we work to match requests with printers in their local area but we also have a larger distribution mechanism in place for those requests that we don't have a local printer for.

 

I wonder if you could contact me regards linking in with our organisation so that we can send any local requests to you. We may also be able to help with sourcing materials like the PVC / acetate face shields if there is anything you are short of.

 

cont...@printforvictory.org

 

Apologies for the plug, but in these unprecedented times, I’m sure its forgivable.

 

Many thanks

 

Mart

Volunteer

#Print for Victory

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/f04687bd-a934-4f2e-ba30-4f6a28ff17e1%40googlegroups.com.

 

---

This email has been checked for viruses by AVG antivirus software. www.avg.com

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/031a01d60d11%246821a990%243864fcb0%24%40alexgibson.net.

--
You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

To unsubscribe from this group and stop receiving emails from it, send an email to reading-...@googlegroups.com.

[M D]

Hi guys, I've reached out to a few local groups on Facebook and had a few offers of acetate sheets.

Most are A4 sheets and I know that the Prusa file requires 240mm x 240mm. Are A4 sheets suitable for use if I can pick them up?
I've also had an offer of some A2 sheets, let me know if they're of use and I'll pick them up and deliver them to the print farm.

M

[Jane Harrison]

Just wanted to say a HUGE thank you to everyone involved in organising this, and to rLab for donating our 3D printers to the cause. 

Two of my immediate family members are NHS doctors, and whilst they are not currently personally involved in the Covid-19 wards, there is always the possibility they will be called upon.  So efforts like this really mean a lot!

Bless you all!

Jane

[David Price]

Hi Martyn,

My spare printer is already at the Green Park-Cisco print farm producing face shields but still have my main printer here and so have just volunteered via the pfv website and joined the fb group.

What access is there to materials - I am in the Reading/Wokingham area?

david

On Thursday, 9 April 2020 11:42:35 UTC+1, Martyn Henderson wrote:

Hi Everyone.

 

Firstly I just wanted to say what an amazing job you are all doing here!

 

I'm a volunteer with Print For Victory - https://printforvictory.org/

Facebook Group: https://www.facebook.com/groups/215268666490874/

 

We are a UK wide group started by a group of volunteers in West Berkshire. We are focussing primarily on providing face shields for primary care workers - GP surgeries, pharmacies, care homes, midwives, district nurses, funeral homes etc. We also have a number of much bigger requests from hospitals - including Royal Berkshire Hospital.

 

...

[Martyn Henderson]

Hi David.

               Thanks for signing up. We will match you up with someone who needs shields shortly.

Regarding material, we have limited stock of acetate for the masks if you struggle to find it. Once you are matched up ping us at k...@printforvictory.org and we can help you out.

If you have any mates with printers who are not already helping cisco please direct them to us if they are interested and would rather print from home etc.

Thanks again

Mart

--
You received this message because you are subscribed to a topic in the Google Groups "rLab / Reading's Hackspace" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/reading-hackspace/S5-p-azOEC4/unsubscribe.
To unsubscribe from this group and all its topics, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/0a1dfbd4-6fff-4d06-948f-ace82d115da5%40googlegroups.com.

[M D]

Hi all,

I've spoken with Kay and going to donate some A4 acetate stock to Print for Victory. Once again my question is whether the Cisco print lab could benefit from some A2 acetate if it can be cut down to the right specs.

M

[Alex Gibson]

Very possibly yes thanks to the A2!  Or I might be able to put in touch with another group that could use them directly.  

 

I will check!

 

Also I have a small number of acetate sheets at home and at one point we bought some comb binder cover sheets – I will find out what happened to those as even if we are sorted with industrial supplies, someone else might be better set up to use them…

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

From: 'M D' via rLab / Reading's Hackspace [mailto:reading-...@googlegroups.com]
Sent: 11 April 2020 09:53
To: rLab / Reading's Hackspace
Subject: Re: [RDG-Hack] Re: 3D printing and Laser Cutting of Medical Shields

 

Hi all,

 

I've spoken with Kay and going to donate some A4 acetate stock to Print for Victory. Once again my question is whether the Cisco print lab could benefit from some A2 acetate if it can be cut down to the right specs.

 

M

--

You received this message because you are subscribed to the Google Groups "rLab / Reading's Hackspace" group.

To unsubscribe from this group and stop receiving emails from it, send an email to reading-hacksp...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/983617d0-93e0-4898-adf8-4f84b58caaee%40googlegroups.com.

[Stuart Ward]

There are a lot of people out there doing this:

https://www.youtube.com/watch?v=sbEj7M3aZIg

Stuart

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/006b01d60fe7%2455c4ef40%24014ecdc0%24%40alexgibson.net.

-- 
-- Stuart Ward +44 778 2325143