Re: [CAD_CAM_EDM_DRO] Milling Machine info needed

Jon,
The stepper motors control the bed in/out,
left/right, up/down, spindle speed, spindle up/down.
The motors measure 7 1/4" long, 4 1/8 dia., 8 wires
hooking up in the back in a "U" shape configuration
numbered from left, 71562438. Back cover is flat.
Color is blue/grey. No nameplate at all nor sticker.
The machine nameplate is Autonumerics Inc, Positool
Model# S-2. I'll be getting photos of the machine and
motors today. BTW, what's VFD? Hope this information
helps,
Thank you,
Ron

--- Jon Elson <elson@...> wrote:

>
>
> R Petersen wrote:
>
> >I am new to this group and hopefully I can get some
> >help getting my milling machine running. I have an
> >Autonumerics Milling Machine, Positool Model # S-2.
> I
> >have all the stepper motors (5) but no controller,
> >computer, etc. It runs on 3 phase. I would like to
> >convert the 3 phase motor to 230 volt single phase
> and
> >CNC. How can I identify the stepper motors and what
> >voltage, there are 8 wires coming out of the
> stepper
> >motors. How can I test the motors? Is there any
> plans
> >I can get to build the CNC unit? Surplus parts? I
> am
> >on a limited budget.
> >
> >
> 5 stepper motors? Usually there would only be 3,
> you must have some
> extra axes. The 3 phase for the spindle motor is
> easy. Get a VFD of
> somewhat
> larger HP rating than the motor. The VFD not only
> converts from single
> to 3 phase, it also gives you variable speed and
> braking. (Most VFD's over
> 1 HP are not listed as running from single-phase
> power, but they will,
> with a little derating.)
>
> Do the stepper motors have any nameplate on them?
> The manufacturer
> may have covered over the nameplate, you might have
> to poke around
> a bit to find it. The stepper motors are most
> likely OK, they are quite
> rugged. If you really need to test them, applying a
> D cell across
> combinations
> of the wires should make them move one step. If you
> can at least give
> us some description (measurements, color, basic
> shape descriptions
> (ie. cast end covers or milled, screws, type of
> terminals) we might be able
> to pin down the make and probably specs.
>
> I have had good luck with Gecko drives for moving
> stepper motors.
>
> The EMC software is free (or $10 on a CD from Ray
> Henry), and requires a
> modest performance Pentium-class computer. 333 MHz
> is about the minimum
> for software driven steppers with EMC.
>
> Jon
>
>
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