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200mw to 500mw diy laser
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chris bate  
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 More options Oct 1 2012, 10:30 am
From: chris bate <thejollygrimrea...@gmail.com>
Date: Tue, 2 Oct 2012 00:30:15 +1000
Local: Mon, Oct 1 2012 10:30 am
Subject: 200mw to 500mw diy laser
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Hi all,

I'm after a small laser capable of melting powdered ABS for a prototype 3d
printer,
has anyone got one they will part with for cash or willing to build one for
cash?

Chris


 
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Luke Hovington  
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 More options Oct 1 2012, 10:59 am
From: Luke Hovington <lu...@hovo.id.au>
Date: Tue, 2 Oct 2012 00:59:53 +1000
Local: Mon, Oct 1 2012 10:59 am
Subject: Re: 200mw to 500mw diy laser
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Your best to look at the section on our website 'how to import a laser'
http://www.hsbne.org/faq/how-to-import-a-laser


 
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Lemming .  
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 More options Oct 1 2012, 11:12 am
From: "Lemming ." <inert...@gmail.com>
Date: Tue, 2 Oct 2012 01:12:48 +1000
Local: Mon, Oct 1 2012 11:12 am
Subject: Re: 200mw to 500mw diy laser
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You're also going to need a lot more power to do it at any decent sort of
speed.

On 2 October 2012 00:59, Luke Hovington <lu...@hovo.id.au> wrote:


 
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Pamela Hauff  
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 More options Oct 1 2012, 1:55 pm
From: Pamela Hauff <hauff.geor...@gmail.com>
Date: Tue, 2 Oct 2012 03:55:30 +1000
Local: Mon, Oct 1 2012 1:55 pm
Subject: Re: 200mw to 500mw diy laser
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Blu Ray Drives use 500mW lasers in them why not use an array of them?


 
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Pamela Hauff  
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 More options Oct 1 2012, 2:53 pm
From: Pamela Hauff <hauff.geor...@gmail.com>
Date: Tue, 2 Oct 2012 04:53:04 +1000
Local: Mon, Oct 1 2012 2:53 pm
Subject: Re: 200mw to 500mw diy laser
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The 405nm Blue Lasers need a lens and a driver. Being a newbie at this I
imagine that breaking a perfectly good $130 blue ray writer and sourcing
lenses and making a driver could see this cost some amount of money.
I am interested in lasers myself for the purpose of making printable
electronics from graphite oxide. Graphite oxide when laser-ed makes
graphene and so you can print your own computer chips.
If there are people interested in starting a laser fund for the purposes of
experimentation I am willing to donate money to the cause.
Making a 500mW-1000mW 405nm laser would be important for various hackspace
projects now and into the future.

On Tue, Oct 2, 2012 at 3:55 AM, Pamela Hauff <hauff.geor...@gmail.com>wrote:


 
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James Hodgkinson  
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 More options Oct 1 2012, 6:25 pm
From: James Hodgkinson <yale...@ricetek.net>
Date: Tue, 2 Oct 2012 08:25:22 +1000
Local: Mon, Oct 1 2012 6:25 pm
Subject: Re: 200mw to 500mw diy laser
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Any laser of non-minimal-power is going to cost money, pulling apart a
bluray writer of high speed can yield a ~1W diode at relatively low cost.
The only restriction on import is that it's not designed to be hand-held, I
found that you can buy replacement optical assemblies for bluray players
sometimes for a fairly cheap price.

James

On 2 October 2012 04:53, Pamela Hauff <hauff.geor...@gmail.com> wrote:


 
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Pamela Hauff  
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 More options Oct 1 2012, 6:55 pm
From: Pamela Hauff <hauff.geor...@gmail.com>
Date: Tue, 2 Oct 2012 08:55:33 +1000
Local: Mon, Oct 1 2012 6:55 pm
Subject: Re: 200mw to 500mw diy laser
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Caught with a handheld laser above 1mW ,without a licence, is an offense I
found out.
http://www.health.qld.gov.au/radiationhealth/healthrelated/laser.asp

Application for a Licence to Use Radiation
Apparatus Type K
47. Research as approved on a case-by-case basis
48. Teaching / education

There are radiation safety courses.

On Tue, Oct 2, 2012 at 8:25 AM, James Hodgkinson <yale...@ricetek.net>wrote:


 
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James Hodgkinson  
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 More options Oct 1 2012, 7:05 pm
From: James Hodgkinson <yale...@ricetek.net>
Date: Tue, 2 Oct 2012 09:05:52 +1000
Local: Mon, Oct 1 2012 7:05 pm
Subject: Re: 200mw to 500mw diy laser
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Yes, but they have to be designed to be hand-portable/pointable. Tether it
to a power supply and it's no longer as such.

The "for various practices" at the start of that page is the important bit.
You're not planning on using it to clean teeth or remove hair so you're
fine.

As a licensed firearms owner I'm legally allowed to own hand-pointable
lasers up to 10mw, but have to be carrying my license to use them, and
you'd still get in a world of hurt if you were doing stupid things with
them.

James

On 2 October 2012 08:55, Pamela Hauff <hauff.geor...@gmail.com> wrote:


 
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Pamela Hauff  
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 More options Oct 1 2012, 7:08 pm
From: Pamela Hauff <hauff.geor...@gmail.com>
Date: Tue, 2 Oct 2012 09:08:52 +1000
Local: Mon, Oct 1 2012 7:08 pm
Subject: Re: 200mw to 500mw diy laser
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So you can use a class IV laser as long as its not portable?

On Tue, Oct 2, 2012 at 9:05 AM, James Hodgkinson <yale...@ricetek.net>wrote:


 
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James Hodgkinson  
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 More options Oct 1 2012, 7:13 pm
From: James Hodgkinson <yale...@ricetek.net>
Date: Tue, 2 Oct 2012 09:13:17 +1000
Local: Mon, Oct 1 2012 7:13 pm
Subject: Re: 200mw to 500mw diy laser
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This is the information that I've been provided by customs and my
understanding of applicable laws *in Queensland*. I'm not a lawyer so don't
use this in your defence, and confirm with local authorities where possible
if there's any doubt.

James

On 2 October 2012 09:08, Pamela Hauff <hauff.geor...@gmail.com> wrote:


 
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chris bate  
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 More options Oct 1 2012, 7:14 pm
From: chris bate <thejollygrimrea...@gmail.com>
Date: Tue, 2 Oct 2012 09:14:46 +1000
Local: Mon, Oct 1 2012 7:14 pm
Subject: Re: 200mw to 500mw diy laser
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i've kind of been down that road before, it didn't work out too well, i
built a few of the driving circuits that poeple had done and i didn't
really get anything that worked,

my biggest problem now is that i have a problem with my wrists where doing
anything like surface mount soldering or anything fiddly isn't as easy as
it used to be , so stuff like this i have to get/pay somone else todo

On Tue, Oct 2, 2012 at 8:25 AM, James Hodgkinson <yale...@ricetek.net>wrote:


 
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chris bate  
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 More options Oct 1 2012, 7:19 pm
From: chris bate <thejollygrimrea...@gmail.com>
Date: Tue, 2 Oct 2012 09:19:25 +1000
Local: Mon, Oct 1 2012 7:19 pm
Subject: Re: 200mw to 500mw diy laser
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the other option i was looking at exploring was instead of using a laser,
use a very fine nozzle and a slow stream of very hot air which is a little
more realistically doable today

On Tue, Oct 2, 2012 at 9:14 AM, chris bate <thejollygrimrea...@gmail.com>wrote:


 
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Pamela Hauff  
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 More options Oct 1 2012, 7:24 pm
From: Pamela Hauff <hauff.geor...@gmail.com>
Date: Tue, 2 Oct 2012 09:24:52 +1000
Local: Mon, Oct 1 2012 7:24 pm
Subject: Re: 200mw to 500mw diy laser
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Yes I have the knowledge and electronics skills.
At this point maybe a lot of research at Laser Pointer Forums - Discuss
Lasers & Laser Pointers <http://laserpointerforums.com/> would also help.
I have taken apart a DVD and I know how to remove the diode.

The driver is a very simple 3V regulator and some resistors etc.
 As for the lens I think they can be purchased online.
This laser and lens would have to be mounted in the router maybe some kind
of electronic control for the lens focusing and laser power.

Sounds like a good project and I am willing to participate.

On Tue, Oct 2, 2012 at 9:14 AM, chris bate <thejollygrimrea...@gmail.com>wrote:


 
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Spoz  
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 More options Oct 1 2012, 7:54 pm
From: Spoz <mr.s...@gmail.com>
Date: Mon, 1 Oct 2012 16:54:16 -0700 (PDT)
Local: Mon, Oct 1 2012 7:54 pm
Subject: Re: 200mw to 500mw diy laser
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Extracting and driving high power blu-ray (405nm) or blue (445nm) diodes is
not too difficult. I'd be happy to show people how to do it easily but
there's a wealth of information on laserpointerforums.com

With regards to the law, as long as it's not battery powered it's ok.


 
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chris bate  
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 More options Oct 1 2012, 8:06 pm
From: chris bate <thejollygrimrea...@gmail.com>
Date: Tue, 2 Oct 2012 10:06:28 +1000
Local: Mon, Oct 1 2012 8:06 pm
Subject: Re: 200mw to 500mw diy laser
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the hardware and motion control part of it is the easy bit, the laser part
is the problem though, i'll have a look at the laser forum,

On Tue, Oct 2, 2012 at 9:24 AM, Pamela Hauff <hauff.geor...@gmail.com>wrote:


 
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Luke Weston  
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 More options Oct 3 2012, 9:57 pm
From: Luke Weston <reindeerfloti...@gmail.com>
Date: Wed, 3 Oct 2012 18:57:16 -0700 (PDT)
Local: Wed, Oct 3 2012 9:57 pm
Subject: Re: 200mw to 500mw diy laser
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It depends.

Basically, the police and customs are really just interested in stupid
bogans who can buy an assembled, working, ready-to-go powerful
"lightsabers" off-the-shelf from places like WickedLasers and shine it at
planes and shine it at people and stupid behaviour like that.

They're really just interested in laser pointers - not laser diodes, laser
modules, laser tubes, laser sharks, or any other kind of laser because the
potential for harmful abuse by dickheads is negligible.

Personally I think the 1W 445nm WickedLasers pointers that are ready to go
off the shelf are a stupid, dangerous product, marketed like they're a toy,
marketed in a stupid, dangerous way to stupid, dangerous customers - they
should not exist, there is no real use case for a handheld laser pointer of
that power and way too much potential for abuse by stupid people. It's even
made to look like a "lightsaber". Stupid.

You can happily import a 100W carbon dioxide tube, and I doubt you would
have any problems - because this big bulky, very fragile glass thing that
is over a meter long and requires water cooling and a special 30kV power
supply* cannot practically be set up and waved around in a stupid manner by
stupid people.

(* An aside: With almost all gas-discharge based lasers, ion lasers, or
flashlamp-pumped lasers, the high-voltage power supply electronics is
actually far more dangerous and far more likely to harm or kill you than
the actual laser light will ever be.)

Most commercial laser cutter units are Class I laser devices, because the
laser is inside an enclosed closed structure with interlocks on the lid
etc. and the laser light cannot escape outside this structure. This means
that the overall laser cutter device is a Class I laser device even though
the actual laser itself is a Class IV laser when it is not operated within
an appropriate closed structure with interlocks.

It's a Class I laser product, even though if you had the same laser
completely exposed with the laser light able to get straight out with no
enclosure, no casing, interlocks, etc. then it would be a higher laser
safety class. The same is true for a lot of DVD readers/writers, Blu-Ray
devices, those DLP projectors with 445nm diodes, etc. etc.

Anybody can go and buy an off-the-shelf Epilog or whatever laser cutter
without any of the regulatory controls or OHS controls that apply to the
use of Class IV lasers in a physics research laboratory etc. (where
you're usually able to get exposed access to the laser light) because the
machine is a Class I laser product, but if you're running a comparable
laser under those sort of laboratory conditions, where there isn't an
interlocked enclosure, where there is actual human exposure to the beam
possible, then you've got much, much more paperwork and legal restrictions
and the need to have a Laser Safety Officer in your institution and all
that stuff. And for a laser cutter machine, you do not want all that.

A Class IV laser which is just a component part going into a finished
system which is overall a Class I or Class II laser product is OK with
negligible bureaucracy, but if the laser remains a Class IV laser product
when it is in its final, finished integrated, packaged state, then you will
have a lot more fuss you'll need to attend to, with the government
regulatory agencies responsible for Health Physics at your state level.

...

read more »


 
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Pamela Hauff  
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 More options Oct 4 2012, 1:21 am
From: Pamela Hauff <hauff.geor...@gmail.com>
Date: Thu, 4 Oct 2012 15:21:55 +1000
Local: Thurs, Oct 4 2012 1:21 am
Subject: Re: 200mw to 500mw diy laser
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Personally I think Safety is an Issue with lasers because of eye damage so
that a few sets of, Laser Safety Glasses of the correct wavelength, is a
must before doing any work with lasers.

On Thu, Oct 4, 2012 at 11:57 AM, Luke Weston <reindeerfloti...@gmail.com>wrote:

...

read more »


 
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