I'm using a normal bipolar stepper motor : http://www.oriental-motor.co.uk/Products/Stepper_motors/Stepper_motors/high_torque_2phase_motors_pkp/?&filter1=Standard&filter2=28+mm&arid=7977&dwn=artnr
now that i setup without speed , the motor start moving. but it started move one step to left and then one step to right continuously . I went to check on my wiring connection, its might be the problem. But the problem still occurred .