I just know someone here can help me! Please reply off-reflector.
I recently had the opportunity to take apart a big old Ricoh copy machine. I
recovered all kinds of neat mechanical and electrical parts, inclucing bunches
of solenoids, motors, etc.
One of the coolest is a motor marked 55SPM-25D5A AX050032 30V 6.5 [ohms symbol].
Google gets nothing on either of these numbers.
It has 6 wires coming out of it. On the basis of this, and the 'coggy' feel
when I turn the shaft, I think that it is a permanent-magnet unipolar stepper motor.
I want to build a remotely tuned very QRO L-network antenna tuner (I already
have a large rotary inductor and capacitor). What I want to do is use this
stepper to turn the capacitor to preset positions. Once the capacitor is set, I
will be able to drive the inductor with a simple geared motor and just tune for
lowest SWR.
Reading material on stepper motor control systems has my head spinning! Is
there some kind of simple off-the-shelf controller that I can get that will do
most of the work? What I would REALLY like would be to just turn a local knob
to adjust the capacitor (sort of like the way a selsyn acts), but there may be
other approaches.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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