Re: [CAD_CAM_EDM_DRO] Re: Has anyone converted a manual Taig Mill to CNC ?

I used 180 in/oz motors from AMSI ($100 ea) and Dan Mauchs 3 axis chopper
board--The motors are 4 volt,2 amp. I'm running the motors at 22 volts and
could probably increase the voltage some as I put extra heat sinks and fan
cooling on the H-Bridge ICs. Dan's board is really nice because it
automatically drops the current down when the motors are idle--I've set them
at 1 amp idle & could probably decrease that a bit but have no problems with
heating so am leaving it as it is. The max speed I've gotten on the motors
in the half step mode is 3200 steps/sec but I've set the max speed in my
software at 2500 steps to keep the torque up. That gives me about 15in/min
max speed on the TAIG mill. As the Z-axis is normally under tension from
its own weight it has little backlash though it could come into play I guess
when making plunge cuts. I didn't actually measure it but it should be
about the same as the X & Y I'd guess. I talked to Forest at Taig tools and
he said 1-2 thousands backlash was the best that could be expected though
there is an adjustment on the nut if it gets sloppy.
Hope this helps.

Lloyd

----- Original Message -----
From: <rab@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, January 31, 2001 11:12 AM
Subject: [CAD_CAM_EDM_DRO] Re: Has anyone converted a manual Taig Mill to
CNC ?


> Lloyd,
>
> What size/type motors and controllers are you using ?
> What's the backlash like in the Z axis ?
>
> Rab
>
> --- In CAD_CAM_EDM_DRO@y..., "Lloyd Stallkamp" <lloyd.stallkamp@h...>
> wrote:
> > I'd also be interested in anyones experience in doing the
> conversion from
> > scratch. I bought the CNC ready TAIG mill and added the necessary
> > components to make it CNC--the price seemed worth it. The motor
> mounts are
> > well made and would be hard to duplicate and although the lead
> screws aren't
> > zero backlash they're reasonably close--.0015 on X and .001 on Y.
> Also, the
> > motor shaft couplings that come with the CNC ready setup are well
> > designed--could be easily duplicated but I probably would not have
> come up
> > with the idea myself. It only took about an hour or so to add the
> stepper
> > motors and have the system up and running--I'm using the Ahha
> Artisan PRO
> > software--I tried the MAX-NC but the Artisan pro is much more to my
> > liking--also about twice as expensive though.
> >
> > Lloyd
> > ----- Original Message -----
> > From: <rab@r...>
> > To: <CAD_CAM_EDM_DRO@y...>
> > Sent: Tuesday, January 30, 2001 4:32 PM
> > Subject: [CAD_CAM_EDM_DRO] Has anyone converted a manual Taig Mill
> to CNC ?
> >
> >
> > > Has anyone converted a manual Taig Mill to CNC ?
> > >
> > > Just wondering if this is worth attempting as there's a big price
> > > difference between the manual mill and the CNC ready versions in
> the
> > > UK.
> > >
> > > I've asked at the Taig group, but no-one seems to have attempted
> this.
> > >
> > > The difference between machines seem to be motor mounts, bearings
> and
> > > leadscrews. Anything else ? Would these be too complex and/or
> > > expensive to do myself ?
> > >
> > > Thanks,
> > >
> > > Rab
> > >
> > >
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