Re: The mechanical part of my router is done!

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "marvinstovall"
<lstovall@c...> wrote:

> Alan, could you please elaborate on why we want the logic power
> isolated from the motor power?
> Thanks,
> Marvin

Let me try: logic cable (+5V, 0V) may pick up spurious signal from
the power cable giving rise to spurious movements?

Experts, correct me if that is wrong. Homework done.

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Marconett KM6VV
> <KM6VV@a...> wrote:
> > Hi Chuck,
> >
> > An interesting and very well made project! And as I have plenty

of

> > stepper motors (I even have the same motors you used!), I'd be
> > interested in seeing plans for building it. Do you have plans

ready

> > that you could post or email?
> >
> > For electrical hints, I'd suggest you keep the stepper wires away
> from
> > the digital wires, and be sure to have enough length to

conveniently

> > reach your driver/PS. I have built a few driver/PS boxes, and

just

> > finished and posted one in the SherlineCNC files (Schematic to be
> posted
> > in a day or two).
> >
> > Also an older one under photos "driver-P" of CCED.
> >
> >
>

http://photos.groups.yahoo.com/group/cad_cam_edm_dro/lst?.dir=/Driver-

> PS+%26+Pendant&.src=gr&.order=&.view=t&.done=http%
> 3a//briefcase.yahoo.com/
> >
> > Ouch! Just look in photos for Driver-P
> > http://photos.groups.yahoo.com/group/CAD_CAM_EDM_DRO/lst
> >
> > My driver/PS boxes use Geckos, and one uses an early version of

the

> > Gecko (CN0143). Microstepping works better on the newer steppers
> that
> > are designed for it.
> >
> > Be sure to put in line switch and fuse, grounded power cord,

power

> entry
> > module (for the filtering), enable switches for each axis (where
> > possible), connectors for the stepper motors (makes trouble

shooting

> > easier), DB25 connector for the parallel port, and a "power on"
> > indicator. Also desirable are SSS (solid state switches) for
> Spindle
> > (and AUX), individual fuses for each Gecko (be sure to put a 470

uF

> cap
> > at each module), Connectors for the limit switches, M6 "tool
> change",
> > and a digitizer.
> >
> > G201's need +5 from the PC, a wall-wart. Don't be tempted to

hang

> a 5V
> > regulator chip on the motor's +48V supply! We WANT the isolation.
> >
> > HTH
> >
> > Alan KM6VV
> > SherlineCNC
> >
> > Charles Knight wrote:
> > >
> > > >
> > > >
> > > >Looks very nice considering the minimum of dollars invested.
> What was your
> > > >total investment so far?
> > > >
> > >
> > > I haven't added it up, completely, yet. But after purchasing
> > > miscellaneous screws, nuts, bolts, drill bits, etc...I think

I'm

> down
> > > somewhere around $20 total. Not too bad for such a complex
> project.
> > >
> > > -- Chuck Knight