[sudo-discuss] giant laser for the robot

[Jake]

well i'm not looking at it that's for sure.  but it's just diodes so does 
that mean it's either 808 or 975?  how to tell the difference?

what does it mean as far as what can it cut?

and what lens do we use to get greater depth of field?  I worry that the 
focus angle is too steep as it is right now (i'll check with smoke and an 
infrared camera inside a light-tight box) to be able to cut through thick 
materials.

and do we need a jet of air to blast stuff out of the way while cutting? 
we have an air compressor now.

On Thu, 19 May 2016, Adam Munich wrote:

> Dark cherry red = 808nm
> Invisible, laser has glass rod = 1064nm
> Invisible, laser is just diodes = 975nm
>
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> On Thu, May 19, 2016 at 1:17 PM, Jake <jake at spaz.org> wrote:
>> i can't tell by looking at the beam.
>>
>> how do you find out such a thing?  we need some sort of spectrometer since
>> it's bright enough to be detected through almost any filter.
>>
>>
>> On Thu, 19 May 2016, Adam Munich wrote:
>>
>>> 1064nm, 808nm or 975nm?
>>>
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>>>
>>> On Thu, May 19, 2016 at 12:55 PM, Jake <jake at spaz.org> wrote:
>>>>
>>>> i was planning to just make an opaque, hinged privacy temporary-wall for
>>>> when the robot is doing something dirty like that.  It will help with
>>>> ventilation too, which is a bigger problem than arc flash with the plasma
>>>> cutter.
>>>>
>>>> but a plasma cutter is such an awesome tool, i think it's totally worth
>>>> the
>>>> annoyance of having to make it safe for puny humans.
>>>>
>>>> -jake
>>>>
>>>>
>>>> On Thu, 19 May 2016, Adam Munich wrote:
>>>>
>>>>> You wont find an NIR blocking plastic curtain, unless it's black vinyl.
>>>>>
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>>>>>
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>>>>>
>>>>>
>>>>> On Wed, May 18, 2016 at 11:41 PM, Patrik D'haeseleer <patrikd at gmail.com>
>>>>> wrote:
>>>>>>
>>>>>>
>>>>>> Cool! Do you have a model number on there somewhere?
>>>>>>
>>>>>> I assume this will be an IR laser if it's a diode array. So if we get a
>>>>>> safety curtain, we'll need one that can block both UV from the plasma
>>>>>> cutter, and IR from the laser. Ditto for safety goggles. I assume
>>>>>> that's
>>>>>> feasible, although likely a little harder than protecting against just
>>>>>> one
>>>>>> of those.
>>>>>>
>>>>>> Patrik
>>>>>>
>>>>>> On Wed, May 11, 2016 at 1:58 PM, Jake <jake at spaz.org> wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> I forgot to include this link:
>>>>>>>
>>>>>>> http://www.idacontrol.com/articles.php?nid=10
>>>>>>>
>>>>>>> and a picture of the laser:
>>>>>>>
>>>>>>> http://i.imgur.com/eXwf7Lo.jpg
>>>>>>>
>>>>>>> I looked it up and to put out 75 watts of laser power, we should
>>>>>>> probably
>>>>>>> feed in about 187 watts, or 2.5 times as much DC power in.  That means
>>>>>>> we
>>>>>>> need 112 watts of cooling with the liquid path.
>>>>>>>
>>>>>>> we can put sonar sensors on the front of the laser so we can pre-focus
>>>>>>> it
>>>>>>> by distance while preparing works to be cut.
>>>>>>>
>>>>>>> -jake
>>>>>>>
>>>>>>>
>>>>>>> On Wed, 11 May 2016, Jake wrote:
>>>>>>>
>>>>>>>> we got a giant laser for the robot.  This will allow it to cut things
>>>>>>>> precisely for us, even if they're really large.
>>>>>>>>
>>>>>>>> of course to do this we'll have a safety interlock to prevent use by
>>>>>>>> untrained people, and we'll have a safety curtain or folding wall to
>>>>>>>> deploy
>>>>>>>> around the robot while the laser is enabled, so nobody can
>>>>>>>> accidentally
>>>>>>>> see
>>>>>>>> the light coming from it.
>>>>>>>>
>>>>>>>> I don't know the wavelength of the laser, but it's a giant laser
>>>>>>>> diode
>>>>>>>> array with a lens on the end, and it has a water cooling jacket, and
>>>>>>>> i
>>>>>>>> think
>>>>>>>> i was told it's a 75 watt laser.  we do have a way to power it.
>>>>>>>>
>>>>>>>> if anyone wants to get involved with playing with this, please let me
>>>>>>>> know. I think we could get it to the point where it could cut through
>>>>>>>> some
>>>>>>>> serious stuff, and the extremely large work area of the robot is a
>>>>>>>> big
>>>>>>>> deal.
>>>>>>>>
>>>>>>>> -jake
>>>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
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>>>>>
>>>>
>>>
>>
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