[Lab] laser mirror holders

Thu Nov 4 14:56:07 EDT 2010

Deformation over time is a strong argument to go to something very stable
like aluminum or something.

I guess plastercine is right out?

On Thu, Nov 4, 2010 at 2:51 PM, Mike Ayukawa <mike.ayukawa at gmail.com> wrote:

>  Hi,
> More info on these types of mounts here:
> http://en.wikipedia.org/wiki/Mirror_mount
> and here:
> http://www.siskiyou.com/images/ixm100.2_spec.jpg
>
> Having used this style of mounts on a laser setup at NRC, I'm not so sure
> that making it out of plastic would be worthwhile.
> It largely depends on how smoothly you want it to operate.  The plastic
> will deform under load in the area of the ball bearing
> pivot over time.  I'd actually think it would be easier just to make some
> up from some aluminum stock.  You don't have to
> mess around with threaded inserts for the prototype.
> /Mike
>
>
>
> On 11/4/2010 1:23 PM, Paul & Andrea Mumby 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
>
>
>
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