stepper motor control
From Noah.org
Haydon Kerk
Haydon-Kerk Idea Drive stepper motor controller
Notes:
- Microstepping down to 1/64th.
- Digital inputs and outputs.
- 4 input lines, opto-isolated requires independent ground and power.
- 4 output lines, open collector requires independent ground and power, and a pull-up resistor where max sinking current is 200mA (Rpullup = VIO / Isink)
- Microstepping waveforms are in the audio frequency range so the motor makes harmless squeaks and whines.
- Stopping the motor on a fractional step requires more hold current even if the motor is not under load. Stopping between a full step is effectively a holding load.
- There appears to be a bug in this controller that prevents it from moving to an odd position index. If you ask it to move to index 1001 it will move, but when you subsequently ask it the current position it will report 1002. This happens in all microstepping modes.
File:haydonkerk usermanual.pdf File:haydonkerk commmanual.pdf
