I have a MITSUMI M35SP-9P stepper motor which I salvaged from a printer. It has 4 wires so I assumed it was a bipolar motor.
I connected it to the arduino using a SN754410 driver board, loaded up a bit of code to run it and all I got was a few jitters.
So off to Google where I found a datasheet for it at http://www.mitsumi.co.jp/latest/Catalog/compo/motor/m35sp9_e.html
This describes the Excitation Method as a 2-2 Phase excitation (Unipolar driving)
but no pinout. I have been searching all over Google but cannot find any clues at all.
So does anybody have any idea on how to connect this motor up?