Kirk Wallace wrote: > > > I suspect the magic is in the Xilinx chip programming, so we'll probably > never know what the magic is. The G201A and some other drives from years ago used CD4000 CMOS chips and had all this. Those drives could be deciphered fairly easily. > I'd like to play with a couple of Pico PWM > amps on one of my Shizuoka steppers and drive them with FPGA PWM. There > would not be any current feedback to work with unless I add a pair of > ADC's though. > > On the other hand it might be more productive to start work on fitting > some brushless motors. > Well, just find the motor you want and I have amps for either. It is a lot simpler to not have current feedback, but that makes the servo loop a little less stable. The fix is to have more encoder resolution, and possibly turn up the servo update rate.
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