There seemed to be a lot of discussion in class on friday about this so I thought I would share my progress so far.
My EasyDriver came in yesterday and I hooked it up to the teensy and my stepper ( http://www.mpja.com/download/31564ms.pdf ). I just ran the simple AccelStepper example codes from the schmalzhaus website ( http://www.schmalzhaus.com/EasyDriver/Examples/EasyDriverExamples.html ) and I am powering the driver with a 12v 1amp supply
The stepper shaft didn’t move but I did hear some “winding” sounds from the stepper.
I do have it wired right, I measured resistance across the terminals. I then switched out the bipolar stepper for another unipolar one I had on hand -http://www.mpja.com/Stepping-Motor-NEMA-17-10-Ohm/productinfo/19533%20MS/
This stepper works perfectly.
I can turn the bipolar stepper’s shaft when it is not hooked up, but it is difficult. I also adjusted the current on the EasyDriver to it is delivering the max 75mA. Still the shaft will not budge.
So that is where I am at right now.
Questions: Perhaps the EasyDriver can not deliver enough voltage/amps to the motor to get it to turn?
I am running the Driver in 3.3v mode (to be compatible with the Teensy), perhaps this is the cause?
Maybe the motor is broken?
Hope other people are having better luck