Re: [CAD_CAM_EDM_DRO] Question about stepper motor

I dis-agree. My slo-syn steppers work great, took 1 hour to rewire, have
TONS of torque and while not fast enough for some applications, they work
great for others.
And at about $25.00 each (surplus) they are a true bargain. I run my CNC
wood router on three of them with pretty good results.

Art

----- Original Message -----
From: <JanRwl@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Tuesday, September 05, 2000 9:03 PM
Subject: Re: [CAD_CAM_EDM_DRO] Question about stepper motor


>
> Chris:
>
> These are 72 RPM "AC-line-powered" synchronous motors. With a specific
> capacitor and resistor in series, between the red and black leads, and
> AC-neutral to the white lead, it will turn one direction when you apply
the
> "hot" AC-line to red, and the opposite direction if to black. It is,
> actually, a "stepper motor", but it has very high induction, so, would be
> very poor in starting/stopping and "ramping" behaviour, compared to a
> similarly-sized "real" stepper.
>
> Some geniouses, however, have figured out how to "re-wire" the various
> windings in these, and "bring out" more wires, enabling them to connect
this
> as a stepper, but it still has those stated shortcomings. Note, though:
If
> you "open" a slo-syn or a stepper motor without the "factory fixtures"
used
> for keeping the armature exactly-concentric, and let it "smack into" the
> stator, tiny chips of magnet (the armature) will bust off and "get in
> between" the stator and armature (a very finely engineered tiny gap!) and
> [deleted-] up the runnin' of it!
>
> To recap: While "theoretically" possible to make this a "stepper", it is
not
> worth the attempt, even if you are flat-broke!
>
> Lotsa luck! Jan Rowland, Troll
>
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