Donkey Saw Pledge

[Charles Yarnold]

Hello all,

Clarks metal shop just 3 mins walk down hackney road is selling a 2 speed donkey saw that can cut 100mm dia metal rod for only £150.

If you don't know what it is, its sort of an automated hacksaw.

Can we pledge it? Yes we can! http://wiki.london.hackspace.org.uk/view/Pledges/Donkey_Saw

Sol

[Ndlovu]

I have been campainging to get one for ages .....

Can we have a picture of what it is as I feel it needs to be resonably robust if it is I an in

[Ndlovu]

I also feel it should solve or at least mitigate some issues around the rage saw

The last time this was discussed on the forum there was a lot of commentary on safety etc 

Primary concern was walking away from  machine ? 

When will the acnode project materialise ?

On Tuesday, April 30, 2013 5:19:15 PM UTC+1, Solexious wrote:

[Charles Yarnold]

I have no picture, will try and pop in tomorrow and get one.

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[Charles Yarnold]

Over 1/2 way there!

[Steve Ganly]

Pledge is now at £130 - just £20 more is needed (nudge nudge)

On Thursday, May 2, 2013 9:44:42 AM UTC+1, Solexious wrote:

Over 1/2 way there!

[Ndlovu (aka) Dean]

There are two saw's in the advert with the second one possibily needing some maintance on it 

I would far prefer the second saw being an old boy I much prefer more solid kit and the extra capacity while not nessesary at this point could be useful, Charles have you had a look at this if you are around 

If we go for the bigger one I will pledge 50 quid the surplus can go to cleaning it up and repairs if need be 

If we are up for the second one can you add me to the pledge please Charles 

On Tuesday, April 30, 2013 5:19:15 PM UTC+1, Solexious wrote:

[pad...@padski.co.uk]

I'll do that as soon as I get to proper internet...
Paddy

Sent from my thing.

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[Charles Yarnold]

Nope, this is for the first one, feel free to start a second pledge though!

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[Adrian Godwin]

The second one may be bigger but I've never seen a lightweight donkeysaw. I'm sure the first one will be quite substantial enough (and I like old iron too, I'm not fond of flimsy stuff).

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[Russ Garrett]

I'm sure a metal shop would not have bought a piece of equipment which
wasn't fit for their purpose.

I do not want to be indiscriminately buying half-ton, three-phase
pieces of industrial machinery for no reason. The capital cost of
these items is the least of our worries if we need to spend
significant sums of money on lifting equipment every time we need to
move them.

Russ

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Russ Garrett
ru...@garrett.co.uk

[Dean Forbes (PERS)]

a metal shop will have saws that last .. but would also have smalls for small and meduim and large in the same manner 

The saw's that are listed ar both small capacity from an enginners point of view .... one being marginally more capacity than the other and would fall into the same maintance bracket as each other and probally cost significantly less than the Rage Saw 

As for the mass it would be man handleable (is there such a word) in the same way the 3 in 1 was, so no addional cost or effort there 

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Dean Forbes

07906948725

[Aaron Sokoloski]

On Thu, May 2, 2013 at 11:04 AM, Dean Forbes (PERS) <de...@deanforbes.com> wrote:

As for the mass it would be man handleable (is there such a word) in the same way the 3 in 1 was, so no addional cost or effort there 

I believe the 3-in-1 was moved with the help of a borrowed engine crane.  It's still plenty of effort, and right now, I think effort is something in short supply.

Also, I'd argue that having two donkey saws is not really necessary, or to put it another way, it's a disproportionate amount of tool to have for the job it does.  We have *enough* space now, but not *tons* of space, and I don't think we should be in a huge rush to fill it up.  Especially since the second donkey saw seems like it will need a lot of work before it becomes functional ("may need a motor rewind or new motor").  We already have two lathes that lack working motors.  Please let's fix the tools we have before acquiring more non-functional ones.

Aaron

[hfs...@googlemail.com]

Pledged £20, target met :D

[Ndlovu (aka) Dean]

An enging crane or trolley jack are fairly standard, there has also been loads of help offered and given whats missing in my mind is orginisation

I was not suggesting two donkey saws  :-) we now will have one that will do the job I am very pleased despite it not what I would have gone for and I hope that it "saves the rage" from some abuse (sorry my sense of humor)

On Tuesday, April 30, 2013 5:19:15 PM UTC+1, Solexious wrote:

[Charles Yarnold]

Thanks all, please pay with the reference "DONKEY" and mark yourself paid on the list.

On 2 May 2013 11:50, <hfs...@googlemail.com> wrote:

Pledged £20, target met :D

[Aaron Sokoloski]

On Thu, May 2, 2013 at 11:55 AM, Ndlovu (aka) Dean <m...@deanforbes.com> wrote:

An enging crane or trolley jack are fairly standard, there has also been loads of help offered and given whats missing in my mind is orginisation

I was not suggesting two donkey saws  :-) we now will have one that will do the job I am very pleased despite it not what I would have gone for and I hope that it "saves the rage" from some abuse (sorry my sense of humor)

Ah, I misunderstood, sorry.

[Peter "Sci" Turpin]

If I recall correctly, there's a huge treadmill motor for the vintage
lathe but it requires a controller building for it, and the original
one's missing so unavailable for reverse-engineering. It's a very
powerful motor and building a simpler PWM MOSFET controller for it would
require some very beefy components & a big transformer.
The motor's 180v DC I believe. The current circuit looks like it uses a
huge choke & capacitor arrangement for voltage dropping instead of a
transformer, which gets a little "mains black-magic", but I think I
recall seeing a similar circuit being done to drive LEDs from mains.
Something about the way caps handle reverse bias when under load?

The mini-lathe motor is apparently borderline functional, but in poor
condition. With all the problems the motor's been throwing up and a �120
to get a new motor vs an entire replacement lathe for �400.. well I'd
look at after-market motors, but it sounds like it's repairs are getting
into reducing returns.

[Aaron Sokoloski]

On Thu, May 2, 2013 at 1:42 PM, Peter "Sci" Turpin <s...@sci-fi-fox.com> wrote:

The mini-lathe motor is apparently borderline functional, but in poor condition. With all the problems the motor's been throwing up and a £120 to get a new motor vs an entire replacement lathe for £400.. well I'd look at after-market motors, but it sounds like it's repairs are getting into reducing returns.

I think I may know what's wrong with it.  Last few weeks I've been busy with the move and Cremer street, but I'll have another go at fixing it this weekend.  If I do get it working, I would like it to be considered disabled until we get the ACNode installed though, if that's ok.

[Charles Yarnold]

Only 1 more pledge to pay!

[Ndlovu (aka) Dean]

I have chiped in on the pledge so that the money is there to collect this 

On Tuesday, April 30, 2013 5:19:15 PM UTC+1, Solexious wrote:

[Ndlovu (aka) Dean]

if there is a surplus I guess it could be used for maintance ... of said tool .... in my head this pledge is "save the rage" which puts a smile on my dial :-) 

[Charles Yarnold]

So sadly when I popped round yesterday they had sold all the machines on the list.

But, the have an extra machine that is very industrial, only issue with it is it needs the start button replacing. (they know who we are so if it actually has bigger issues we can roll it back ;)

Hipster is going to pop round today to measure it up and check it fits in the lift, any objections to getting this one if its a goer?

Sol

[Dean Forbes (PERS)]

cool banna I am happy or should I say delighted with that 

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Dean Forbes

07906948725

[Charles Yarnold]

We now have a donkey saw, work has started on cleaning it up.

https://www.dropbox.com/s/xwh2b4kyhvmv55t/2013-05-21%2012.25.47.jpg

https://www.dropbox.com/s/08gnqmf5icnn3z8/2013-05-21%2012.26.08.jpg

On 30 April 2013 17:19, Charles Yarnold <charles...@gmail.com> wrote:

[Gruff]

Holy cow! They weren't messing about when they built that. Were they expecting to have to saw the legs off the Eiffel Tower?

[Peter "Sci" Turpin]

Absolutely lush! :)

On 21/05/2013 12:51, Charles Yarnold wrote:
> We now have a donkey saw, work has started on cleaning it up.
>
> https://www.dropbox.com/s/xwh2b4kyhvmv55t/2013-05-21%2012.25.47.jpg
> https://www.dropbox.com/s/08gnqmf5icnn3z8/2013-05-21%2012.26.08.jpg
>
>
> On 30 April 2013 17:19, Charles Yarnold <charles...@gmail.com

> <mailto:charles...@gmail.com>> wrote:
>
> Hello all,
>
> Clarks metal shop just 3 mins walk down hackney road is selling a 2
> speed donkey saw that can cut 100mm dia metal rod for only �150.
>
> If you don't know what it is, its sort of an automated hacksaw.
>
> Can we pledge it? Yes we can!
> http://wiki.london.hackspace.org.uk/view/Pledges/Donkey_Saw
>
> Sol
>
>

[J.K.]

No objections.

[Henry Sands]

In process of taking the saw apart for cleaning and maintenance, seeing as how it hasn't had any for 20+ years its going to take some time, I have somewhat taken over the metal workshop and given it an initial cleaning and dig out, I don't want to put it back together in the meantime as some of the bolts have been bent, making it a pain.

Problems spotted so far:-

Drive belts slightly damaged

The vice screw has had its thread worn away in the middle due to compressed metal shavings grinding it down

No plug

Start button doesn't work

Vice bed is slightly worn in some areas (shouldn't be an issue)

Vice faces aren't square/are worn (could be remilled)

Shock absorbers broken (not required for running, just dont drop the saw or you'll break it)

Other than that its in very good nick, its a huge old hunk of cast iron that should be very hard to break and all the moving parts seem to be fine and without excessive wobble. It just needs about half a ton of elbow grease to clean off the stale, caked on oil and metal shavings.

The paint on the base is good, the top is not so good, we'll need to get some protective stuff to coat it to stop it rusting or just liberally coat it in oil

[Charles Yarnold]

You have done a wonderful job, its had a real transformation!

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[Henry Sands]

Pictures!

http://imgur.com/a/9RDYs

[SamLR]

SO DAMN COOL 

Thanks for this. It looks lovely. 

S

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[cepm...@yahoo.co.uk]

Nice one!

Proper old skool machinery, built to last.

Phil

--
" et cognoscetis veritatem et veritas liberabit vos. "

[Henry Sands]

speaking of built to last, the mechanics are, the electrics are not, to my untrained eye the switch unit looks "fucked", I'd like to have some trained eyes look at it if I can.

[Adrian Godwin]

Ditch the electrics and get an oil engine

 http://www.youtube.com/watch?v=xl1PVzUHPuE

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[Tim Storey]

well done.
proper tools.
\t

[Peter "Sci" Turpin]

Excellent job! I'll keep my eye out for any bits that may be suitable to
refurbishing it. Is the motor functional? If not, what sort of spec
would we be looking for?

My first choice for getting old oil & grease off is paraffin. Mind you,
we'd need a lot and a big bucket to soak the whole machine in it.

[Morris]

you have a very large thumb sir.

ps. nice work!

On 21 May 2013 18:45, Henry Sands <hfs...@googlemail.com> wrote:

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+++++>++++++++++<<<<
-]>>>+++++++.>++++++
+++++.+++..---------
.++++++++++.<<+++.<.

[Henry Sands]

 Update:

Saws back together and oiled, there was just enough metal left on the threaded vice bar to retap it using the vice block and some upper body strength, so that all works now, I'll put guides to use on the wiki as you need to full the oil holes with oil before each job and keep it lubricated.

All it needs now is the shock absorber fixing and the electrics, which I will leave to others.

http://i.imgur.com/0oRDzLF.jpg

http://i.imgur.com/pdgC8t0.jpg

[Jonty Wareing]

Amazing work! That was very quick indeed.

--jonty

[Henry Sands]

it wooorks it woorks! ahahahahahahahahahahahahaha

[SamLR]

Not wanting to add too much to your work load but can we get some instructions for it printed out and stuck near it. Preferably with some big stickers along the lines of 'touch'/'don't touch' for the various bits and pieces otherwise I'm not sure it'll be working for long

Thank you again!

S

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[Henry Sands]

I will make the wiki page in a sec, I need to take pictures of specific bits

[SamLR]

Henry, you're awesome. Thanks!

S

[Paddy Duncan]

that's what she said

[Henry Sands]

http://www.youtube.com/watch?v=Hl6zryoi53w&feature=youtu.be

Have a video.

Took 2 mins to cut a scaffold pipe and about 20 seconds to cut a piece of alu box.

PLEASE DON'T USE IT AT THE MOMENT, the floor is not level and it wobbles and walks everywhere, wait till we have a suitable base made.

[Tim Reynolds]

This is great, thankyou for all the work you've put into it.

[Aaron Sokoloski]

On Wed, May 22, 2013 at 10:00 PM, Henry Sands <hfs...@googlemail.com> wrote:

http://www.youtube.com/watch?v=Hl6zryoi53w&feature=youtu.be

Have a video.

Took 2 mins to cut a scaffold pipe and about 20 seconds to cut a piece of alu box.

PLEASE DON'T USE IT AT THE MOMENT, the floor is not level and it wobbles and walks everywhere, wait till we have a suitable base made.

 

Just a reminder that not every member subscribes to the mailing list.  The only sure way to ensure that everyone gets this message is to attach a note to the saw itself.

P.S.  Nice work.  Saw is looking sexy.

[SamLR]

I'd recommend a note and removing the plug. People can be impressively blind when it comes to signs 

S

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[Tim Storey]

indeed. disable it and leave a LARGE sign. removing the plus will not be enough I would opine.
\t

[Henry Sands]

I'll do it tomorrow, too tired, I'll do the wiki page tomorrow too

On Tuesday, April 30, 2013 5:19:15 PM UTC+1, Solexious wrote:

Hello all,

Clarks metal shop just 3 mins walk down hackney road is selling a 2 speed donkey saw that can cut 100mm dia metal rod for only £150.

If you don't know what it is, its sort of an automated hacksaw.

Can we pledge it? Yes we can! http://wiki.london.hackspace.org.uk/view/Pledges/Donkey_Saw

Sol

[Charles Yarnold]

its first run: http://www.youtube.com/watch?v=4B-54ffaD2c

--

[SamLR]

Henry, no sweat, thanks for everything (and to everyone else who's worked on this as well)

S

[Paddy Duncan]

And now:

The flexible metal conduits are all replaced with new ones, and all the contactor contacts are cleaned, so ready for another 60 years :)

Just needs fixing to floor....

Paddy

 

From: london-h...@googlegroups.com [mailto:london-h...@googlegroups.com] On Behalf Of Henry Sands
Sent: 22 May 2013 22:00
To: london-h...@googlegroups.com
Subject: [london-hack-space] Re: Donkey Saw Pledge

 

http://www.youtube.com/watch?v=Hl6zryoi53w&feature=youtu.be

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