[Lab] laser mirror holders

Thu Nov 4 14:44:52 EDT 2010

pretty well an inch. They say they are 1" or 25mm. Pretty thin. Like a mm or
so.

I don't think it heats .

On Thu, Nov 4, 2010 at 2:43 PM, Paul & Andrea Mumby <themumbys at gmail.com>wrote:

> exactly 1" circle?
>
> Also what is the approximate thickness of the mirror?
>
> And to your knowledge does the mirror heat up during use (and if so to what
> approximate max temperature)? I would assume they are designed to fully
> reflect the wavelength your laser operates at, but if they heat beyond a
> certain point we need to consider the thermal stress on the printed parts,
> since the thermoplastic used in 3d printing softens at a fairly low
> temperature (both PLA and ABS) I would need to compensate for that in the
> design.
>
> Thanks!
>
> - Paul
>
>
> On Thu, Nov 4, 2010 at 2:00 PM, Darcy Whyte <darcy at siteware.com> wrote:
>
>>
>> It should be easy to drill and tap into a cupcake part if needed. If you
>> have a better idea, cool....
>>
>> The mirror is a 1" circle.
>>
>>
>>
>>
>> On Thu, Nov 4, 2010 at 1:58 PM, Paul & Andrea Mumby <themumbys at gmail.com>wrote:
>>
>>> I assumed it didn't need to be the same as the ebay one, but that gives
>>> me an idea of the mechanics, so I know what type of behavior I'm
>>> emulating...
>>>
>>> I'm not sure about the threaded hole idea, but I'm sure I can get
>>> something equally as effective from a printed part for sure.
>>>
>>> If you can bring the existing one that would give me another hands-on
>>> example, and I could take some pics of it too to use for reference... is the
>>> mirror itself circular? or square?
>>>
>>> I'll let you know shortly if we can meet tonight.
>>>
>>> - Paul
>>>
>>> On Thu, Nov 4, 2010 at 1:27 PM, Darcy Whyte <darcy at siteware.com> wrote:
>>>
>>>>
>>>> The mirror holder on my cutting head has a 1" threaded hole. you slip
>>>> the mirror into the hole and there is a threaded circle that you screw in to
>>>> pinch it down into the hole.
>>>>
>>>> If we are able to meet tonight I'll bring that one.
>>>>
>>>> It doesn't have to work the same as the one on ebay. As long as it can
>>>> hold the 1" mirror and be tilted for adjustment (through a screw or
>>>> something to make it accurate).
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Thu, Nov 4, 2010 at 1:23 PM, Paul & Andrea Mumby <
>>>> themumbys at gmail.com> wrote:
>>>>
>>>>> Ok, so if I get the mechanics from those photos, their particular
>>>>> design has the flat square bracket (with the circular hole) which would be
>>>>> the plate which the mirror itself would be fixed against. This pivots on a
>>>>> ballbearing in the corner of the L shaped bracket, with 2 center springs
>>>>> under tension, which keeps the corner set screws under compression, allowing
>>>>> you to adjust the X and Y tilt, the L shaped bracket has 2 holes one in each
>>>>> "arm" which I'm assuming are for mounting the whole apparatus to your
>>>>> machine...
>>>>>
>>>>> I'm not sure how the mirror is affixed to the flat plate with the
>>>>> circular hole, they mention plastic tipped screws, but I don't see that
>>>>> anywhere in the pic, but I might be missing that... Either way if my above
>>>>> assumptions of the mechanics are correct, I should be able to mock up a
>>>>> design for this quite easily...
>>>>>
>>>>> If you have any other input to offer that might let me get something
>>>>> mocked up in time to show you tonight.
>>>>>
>>>>> I'll confirm with my wife when I get home from work if tonight is ok
>>>>> for a quick meeting, and if she's ok with that then I'll email you and
>>>>> confirm timing and such early this evening...
>>>>>
>>>>> Does that work for you?
>>>>>
>>>>> Thanks!
>>>>>
>>>>> - Paul
>>>>>
>>>>> On Thu, Nov 4, 2010 at 12:44 PM, Darcy Whyte <darcy at siteware.com>wrote:
>>>>>
>>>>>> Did you follow the ebay link I sent?
>>>>>>
>>>>>> Okay, we can meet up tonight later if you want. Just send me the
>>>>>> address at time to darcy at siteware.com. I can probably come around 9
>>>>>> or just before 10 for a quick meeting.
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Thu, Nov 4, 2010 at 12:41 PM, Paul & Andrea Mumby <
>>>>>> themumbys at gmail.com> wrote:
>>>>>>
>>>>>>> I'm in Bayshore... My house and workshop are a bit of a disaster area
>>>>>>> lately though lol... I think my wife would shoot me if I invited someone in
>>>>>>> right now :)
>>>>>>>
>>>>>>> Either way, we could meet quickly to discuss your options, if you
>>>>>>> have some hand sketches or something of the parts, and bring along some
>>>>>>> samples, and dimensions, I could mock something up tonight/tomorrow, and we
>>>>>>> could discuss it more at the faire... your right in that there might not be
>>>>>>> a ton of time, but I was surprised how easily the design/testing cycle works
>>>>>>> now that I have rapid prototyping capability... Small parts take 20min to
>>>>>>> print or less, so I can easily whip up a design in an hour or less, print
>>>>>>> it, and take an iterative design approach to something that is normally much
>>>>>>> more monolithic... It wastes a bit more material, but since material costs
>>>>>>> are so low for the plastic filament, it's totally worth the agility gained
>>>>>>> in the design process...
>>>>>>>
>>>>>>> Let me know what your thoughts are and we can talk about it.
>>>>>>>
>>>>>>> I'm a bit busy tonight and tomorrow, as I also have some paperwork to
>>>>>>> catch up on for my home business, and some other todo items to deal with
>>>>>>> (I've been multitasking between print and other stuff) but I could probably
>>>>>>> afford an hour or so either tonight or tomorrow between 8pm and 10pm to
>>>>>>> discuss options. Otherwise we can talk at the faire and meet up sometime
>>>>>>> following that if that works better.
>>>>>>>
>>>>>>> Even an email with some sketches/dimensions and pics of parts and so
>>>>>>> on might let me mock up something quickly if that's preferable as well.
>>>>>>>
>>>>>>> Thanks!
>>>>>>>
>>>>>>> - Paul
>>>>>>>
>>>>>>> On Thu, Nov 4, 2010 at 12:26 PM, Darcy Whyte <darcy at siteware.com>wrote:
>>>>>>>
>>>>>>>>
>>>>>>>> I would think that there wouldn't be much time to do it during the
>>>>>>>> Maker Faire. The printing would be easy but the design (and any experiments)
>>>>>>>> would take a while.
>>>>>>>>
>>>>>>>> I think the plastic cost is cool.
>>>>>>>>
>>>>>>>> Where are you? If you want to try some test runs, I could drop by if
>>>>>>>> you want.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, Nov 4, 2010 at 12:18 PM, Paul & Andrea Mumby <
>>>>>>>> themumbys at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> There will be several 3d printers at the maker faire, I would bet
>>>>>>>>> you could have mirror holders made at the maker faire with enough
>>>>>>>>> bartering/negotiating lol... 1" holding brackets wouldn't take long to
>>>>>>>>> print, it would mostly be design/testing time that would consume the most
>>>>>>>>> effort...
>>>>>>>>>
>>>>>>>>> I'd be fine with printing them for you at maker faire for cost of
>>>>>>>>> plastic used (which would be minimal, hell I would likely do it for free
>>>>>>>>> depending on the volume of plastic). provided we have the time/resources to
>>>>>>>>> design the parts. I'm sure a lot of the other guys will have more Industrial
>>>>>>>>> Design experience than I do though.
>>>>>>>>>
>>>>>>>>> Anyway, point being there will be at minimum 5 3d printers, and
>>>>>>>>> possibly as many as 7-8 at the maker faire. So between all of them I'm sure
>>>>>>>>> your parts could get done ;)
>>>>>>>>>
>>>>>>>>> Also there is talk about kickstarting the RepRap Loaner program at
>>>>>>>>> the ottawa Maker Faire, so we will be trying to build a reprap mendel at the
>>>>>>>>> faire, and use it as a community loaner model.
>>>>>>>>>
>>>>>>>>> I've been working on printing parts to have at the maker fair in
>>>>>>>>> the evenings this week (just for examples) so if you have a design in mind,
>>>>>>>>> or some info, perhaps I could run a few off as tests tonight or tomorrow,
>>>>>>>>> and bring them along, get a bit of a head start.
>>>>>>>>>
>>>>>>>>> Let me know.
>>>>>>>>>
>>>>>>>>> - Paul
>>>>>>>>>
>>>>>>>>> On Thu, Nov 4, 2010 at 11:55 AM, Darcy Whyte <darcy at siteware.com>wrote:
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I'm now wanting to make mirror holders. The mirrors are 1". I need
>>>>>>>>>> two of them. They should have a tilt adjust.
>>>>>>>>>>
>>>>>>>>>> Any ideas?
>>>>>>>>>>
>>>>>>>>>> The artengine makerbot? What is the status of that? What is the
>>>>>>>>>> procedure for booking it?
>>>>>>>>>>
>>>>>>>>>> I'd like to try and have them done before Guy and I are finished
>>>>>>>>>> making the mounting brackets for the laser tube.
>>>>>>>>>>
>>>>>>>>>> Here are some mirror holders on ebay:
>>>>>>>>>>
>>>>>>>>>> http://cgi.ebay.com/2-Thorlabs-1-Optic-Mounts-Holder-Laser-Mirror-Lens-/160361359773?pt=LH_DefaultDomain_0&hash=item255648299d#ht_1115wt_869
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Lab mailing list
>>>>>>>>>> Lab at artengine.ca
>>>>>>>>>> http://artengine.ca/mailman/listinfo/lab
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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