[sudo-discuss] giant laser for the robot

[Adam Munich]

did not get tickets. not sure when I'll make it to SF next.

- - - - Begin automatically generated footer - - - -

Weblog: http://adammunich.com
Cell: +1-650-452-0554, M-F 10a - 8p PST

PGP Public Key: https://pgp.mit.edu/pks/lookup?search=adam+munich


On Thu, May 19, 2016 at 1:47 PM, Jake <jake at spaz.org> wrote:
> let's do some experiments when you come to town, not involving eyeballs
> though.  i'm sure you can think of another way to determine the exact
> wavelength and I have some cameras that can see IR with no problem.
>
> anyway, do you know how we can pick an appropriate lens to increase depth of
> field, for cutting through thicker materials?  Or is that even something
> that's possible?  I notice that with the Epilog laser cutter, you need to
> focus your materials' distance from the final lens just right for it to cut.
> If it were collimated that wouldn't be necessary, right?
>
>
> -jake
>
>
> On Thu, 19 May 2016, Adam Munich wrote:
>
>> So it's not 1064
>>
>> Knowing the wavelength is important so you can get lenses with the
>> proper anti reflective coating. With un coated lenses, 8% reflection
>> at 100W is a fuck ton of scatter.
>>
>> You dont need very high powers to see 808nm. What I would do is shine
>> it into sandblasted glass, so the light is diffuse and safer to look
>> at.
>>
>> And yeah an air compressor is very needed.
>>
>>
>>
>> - - - - Begin automatically generated footer - - - -
>>
>> Weblog: http://adammunich.com
>> Cell: +1-650-452-0554, M-F 10a - 8p PST
>>
>> PGP Public Key: https://pgp.mit.edu/pks/lookup?search=adam+munich
>>
>>
>> On Thu, May 19, 2016 at 1:29 PM, Jake <jake at spaz.org> wrote:
>>>
>>> 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
>>>>
>>>> - - - - Begin automatically generated footer - - - -
>>>>
>>>> Weblog: http://adammunich.com
>>>> Cell: +1-650-452-0554, M-F 10a - 8p PST
>>>>
>>>> PGP Public Key: https://pgp.mit.edu/pks/lookup?search=adam+munich
>>>>
>>>>
>>>> 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?
>>>>>>
>>>>>> - - - - Begin automatically generated footer - - - -
>>>>>>
>>>>>> Weblog: http://adammunich.com
>>>>>> Cell: +1-650-452-0554, M-F 10a - 8p PST
>>>>>>
>>>>>> PGP Public Key: https://pgp.mit.edu/pks/lookup?search=adam+munich
>>>>>>
>>>>>>
>>>>>> 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.
>>>>>>>>
>>>>>>>> - - - - Begin automatically generated footer - - - -
>>>>>>>>
>>>>>>>> Weblog: http://adammunich.com
>>>>>>>> Cell: +1-650-452-0554, M-F 10a - 8p PST
>>>>>>>>
>>>>>>>> PGP Public Key: https://pgp.mit.edu/pks/lookup?search=adam+munich
>>>>>>>>
>>>>>>>>
>>>>>>>> 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
>>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> sudo-discuss mailing list
>>>>>>>>>> sudo-discuss at lists.sudoroom.org
>>>>>>>>>> https://sudoroom.org/lists/listinfo/sudo-discuss
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> sudo-discuss mailing list
>>>>>>>>> sudo-discuss at lists.sudoroom.org
>>>>>>>>> https://sudoroom.org/lists/listinfo/sudo-discuss
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>