Quote:
Originally Posted by Greggles
Hey Bojan,
Thanks for your reply. Unfortunately from what I've read the onstep only works for stepper motors. From my understanding the eq1 ra motor drives are not stepper motors  have attached a photos of my motor. |
Of course, you are right.
You need to replace DC motor with stepper (plus driver).. there is a bit of mechanical fiddling, but then you will have stable system.
To stabilize the DC motor rate is possible, it can be done by adding some sort of encoder and couple it with stable oscillator in PLL ( I did it long time ago, using rotor from washing machine timer (it is 10-pole magnet) as encoder, tone head from tape recorder as sensor, CD4046 as PLL and reference oscillator).
If you are interested in this solution I can share it.. I think I wrote about it here on forum.
Also, you can find DC motors with optical encoder attached in old printers.. so plenty of solutions is out there.
But I still recommend doing it right - with OnStep.