Re: Shopbot, Rack and Pinion, Ball Screw, Acme precision screw?

Check out the oriental motors site that I listed in my last post.
They have the specs on all of their gearheads. I think the backlash
on the one that I listed (shopbots) is .005 +-

That's probably close enough for router work isn't it? I never was
good at decimal to inch conversion.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "km6vv" <KM6VV@a...> wrote:
> Hi Wes,
>
> I haven't seen the figures for the backlash on the gearheads. I
have
> a data sheet (?) in my gearhead boxes, but no help there.
>
> I was thinking of using these motors/gearheads on something like a
> router. I also haven't seen the spec's on the ShopBots, where I
> believe similar motors/GHs are used. That's where I thought you
were
> contimplating using them.
>
> Could be OK for your Grizz, but why not just use a appropritately
> sized stepper at 1:1 or perhaps 2:1 to drive the axis?
>
> Alan KM6VV
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Harvey White <madyn@i...>
> wrote:
> > On Fri, 25 Apr 2003 13:07:29 -0700, you wrote:
> >
> > >Hi Wes,
> > >
> > >I'd watch the surplus and ebay channels for Oriental Motors
(Vexta)
> > >stepper/gearhead motors. I recall seeing ShopBot pix, and the
> > >motors/gearheads looked like ones I've picked up. PH266 motors,
> > >2GK7.5KA gearheads. Makes me want to build a router if I can
use
> my
> > >parts!
> >
> > I've looked for the specs on the gearheads. I've got several
> > PH66-01GK Vexta steppers with 2GK18KA gearheads. I've managed to
> > crossreference the motors, and found the specs on the motors (I
> > think), but the gearheads remain unavailable, spec wise...
> >
> > Any pointers?
> >
> > I'm thinking of driving the fine feed on a Grizzly Mini-mill with
> one,
> > I've got a Z axis DRO, so I'm less worried about backlash than
> > otherwise.
> >
> > Harvey
> >
> >
> > >
> > >Alan KM6VV