Driving control considering torsional vibration suppression in a stepping motor with a full-step drive

This paper presents modeling of a stepping motor with a full-step drive and design on the timing of the pulse inputs for the suppression control of vibration. When the stepping motor is shifted to the excitation phase, a torsional vibration occurs at the shaft part connecting to the motor due to an inertia load. Therefore, in the present study, a motor model considering a torsional vibration is designed and built. The validity of the proposed model is verified by comparing the model considering a torsional vibration with the conventional model without such a consideration. The timing of the pulse inputs to drive the motor is then optimized to suppress residual vibrations and also to shorten the settling time. Finally, the effectiveness of the proposed method is demonstrated through experiments.