Stepper Motor not moving
I am trying to make the parallax stepper motor turn. I am using parallax stepper motor (12-Volt Unipolar Stepper Motor (#27964)) and the ULN2803. It is wired according to the documentation (Stepper_motor_27964.pdf). I have double checked the wiring. The stepper kinda of moves back and forth in a jiggering motion. The only change in wiring was attaching the 12 volt ground with the Vss ground. I believe that either the coils are incorrect or the time·each coil is turned on is incorect. The color code for the stepper motor matches the documentation. Any suggestions?
Comments
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- Stephen
Chuck
to get the motor to move you need to run the power out like this
(+,--) (+,--)
(--,+) (+,--)
(--,+) (--,+)
(+,--) (--,+)
you may be able to use the uln2803, im not shure how the diode biasing will work, you could also use dual h bridges, the nice thing is you can condense the wiring down to two wires, one for each phase using a flip flop to run the h bridge, or the easy way would be to find a cheap stepper motor driver for bipolar stepper motors.