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