Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Thanks for your thoughts.

This is where the idea came from. My thought is to mount a motor on the linear slide & use an adapter for the drill bits..

http://www.instructables.com/id/$30-High-Speed-PCB-Drill-Press/?&sort=ACTIVE&limit=40&offset=40

After another 4 hours searching I found out that 5/32" is 4mm. I found a motor... 12000 RPM no load, 6000 RPM @ full load (130 Watts,) rated for continuous duty. It is not round! but has six sides... better for mounting I think..

http://www.ebay.com/itm/flex-collet-coupler-for-4mm-motor-shaft-and-3-18mm-1-8-flex-cable-rc-boat-/140696666271?pt=Radio_Control_Parts_Accessories&hash=item20c22cc09f


I think with the motor mounted to the linear slide the axial deviation will be acceptable. Any helpful thoughts?

The other (expensive) idea is the Proxxon MICROMOT Drill Stand MB 140/ S and rotary tool. I found a metal adapter to use a Dremel tool with the Proxxon Drill Stand.. the problem is the company is in Australia & does not ship to the US..


Chuck

--- In Homebrew_PCBs@yahoogroups.com, Donald H Locker <dhlocker@...> wrote:
>
> OK. I can envision a drive to the collet chuck as a separate entity with no problem. For some reason, I was thinking this was about fitting a collet chuck directly to a high speed air or electric motor for PCB milling. And while that can be done, a spider or helical coupling for those speeds would be pretty spendy and the whole assembly would require some careful machine work to be functional.
>
> Thanks,
> Donald.
> --
> ∗Plain Text∗ email -- it's an accessibility issue
> () no proprietary attachments; no html mail
> /\ ascii ribbon campaign - <www.asciiribbon.org>
>
> ----- Original Message -----
> > From: "Kevin Impson" <internetgiest@...>
> > To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> > Sent: Sunday, September 30, 2012 5:24:37 PM
> > Subject: Re: [Homebrew_PCBs] Re: Want to attach motor to 1/8" COLLET
> >
> > Hi Everyone,
> >
> > Donald, what you do is either with a timing, V, friction belt and
> > pulley's you connect them.
> >
> > You mount the shank and at the top put a small pulley and then offset
> > mount the motor and put a larger pulley on and then put a belt on the
> > pulley's and you have it.
> >
> > You don't want to mount the motor directly to the shank because of the
> > vibrations and axial offset you have.
> >
> > If you really have to stick to your guns about direct mount then I
> > suggest a spider shaft coupler, the rubber center piece of the couple
> > will allow for slight axial deviation and will absorb some vibration.
> >
> > Any other questions let me know, I'm working on my spray etcher, I
> > finally got my acid pump, stainless steel cartridge heater for the
> > inline acid heater reservoir and have all the parts need so it's
> > gluing, cutting, fitting and screaming time.
> >
> >
> > Best Regards,
> >
> > Kevin I.
> >
> >
> >
> > ________________________________
> > From: Donald H Locker <dhlocker@...>
> > To: Homebrew PCBs <Homebrew_PCBs@yahoogroups.com>
> > Sent: Sunday, September 30, 2012 7:15 AM
> > Subject: Re: [Homebrew_PCBs] Re: Want to attach motor to 1/8" COLLET
> >
> >
> >
> > Hi, Kevin.
> >
> > That link worked OK for me. I'm not seeing how to attach one of those
> > to the motor, though.
> >
> > Donald.
> > --
> > ∗Plain Text∗ email -- it's an accessibility issue
> > () no proprietary attachments; no html mail
> > /\ ascii ribbon campaign - <www.asciiribbon.org>
> >
> > ----- Original Message -----
> > > From: "Kevin Impson" <internetgiest@...>
> > > To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> > > Sent: Saturday, September 29, 2012 7:18:33 PM
> > > Subject: Re: [Homebrew_PCBs] Re: Want to attach motor to 1/8" COLLET
> > >
> > > Hi All,
> > >
> > > I don't know happened to Ebay but it wigs out with the link
> > > below....
> > >
> > > just do a search with Google for "straight shank collet chuck"
> > > you'll
> > > see a search result for Ebay about half way down, that will get you
> > > where you need to be...
> > >
> > > Also you can search for "straight shank collet chuck" directly on
> > > Ebay
> > > and get slightly different results.
> > >
> > > One seller seems pretty good, yes it's china, but look at the
> > > runout... seller name "ctctoolseller"
> > >
> > >
> > > Later....
> > >
> > > Kevin I.
> > >
> > >
> > >
> > > ________________________________
> > > From: Kevin Impson <internetgiest@...>
> > > To: "Homebrew_PCBs@yahoogroups.com" <Homebrew_PCBs@yahoogroups.com>
> > > Sent: Saturday, September 29, 2012 2:51 PM
> > > Subject: [Homebrew_PCBs] Re: Want to attach motor to 1/8" COLLET
> > >
> > >
> > >
> > > Hi psykhon,
> > >
> > > I did a little more refining on my search on Ebay try this one...
> > >
> > > http://www.ebay.com/sch/sis.html?_nkw=ER20-STRAIGHT-SHANK-COLLET-CHUCK-TOOL-HOLDER-ER-20-
> > >
> > > For a 1/8" collet you need the 4mm collet just to save you the time
> > > and hassle...
> > >
> > > Best Regards,
> > >
> > > Kevin I.
> > >
> >
> > [snip]
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> >
> > Be sure to visit the group home and check for new Links, Files, and
> > Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>