a stepper motor is microstepped. when pulsed, the shaft moves by a small step and then returns to its original position, ultimately producing no revolution at all. this happens for the entire duration of the pulse. what could the reason be ?
Microstepping requires current to be applied continuously to both phases. If current is removed, the motor will return to the nearest pole because of its internal magnetism. If you are using PWM to generate the microstepping currents, you may have selected too low a frequency.
Can you give us more details?
Or, if it had been operating correctly, perhaps one of the driver transistors (MOSFET's or whatever) has become shorted?
firstly,thanks for your response.i am not using pulse width modulation for generating micro-stepping currents(that option in my drive stands disabled...after your mail i tried enabling it and tried to run my motor at maximum frequency of 40khz all the way down to 1.25khz...there was no difference.same old story).could you think of any other solutions to this problem.for ur info my stepper motor is of 0.16 amp peak,5volt 1kg torque,1.8degree step angle,30mm diameter rating. also another motor of 0.65 amp peak,24volt,1.8degree step angle,80mm dia worked fine with the same drive(ofcourse with different current settings).help me out on this please
I dunno.. you've kind of exhausted my repertoire of stepping motor knowledge.
Is it perhaps a five-wire motor? If the two w> firstly,thanks for your response.i am not using pulse width modulation
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