Stepping motor driving device, sheet processing device, and image processing apparatus

A sheet processing device comprising:

• a stepping motor driving device that drives a stepping motor according to a drive pulse of a step signal, the stepping motor driving device including a phase matching unit that matches, at a time when there is a possibility that a rotor and a phase signal are out of phase with each other, phases of the rotor and the phase signal by applying at least one drive pulse after energizing the stepping motor for a predetermined time and applying a phase signal having a predetermined duration for a final pulse.

An image processing apparatus comprising:

• a sheet processing device including a stepping motor driving device that drives a stepping motor according to a drive pulse of a step signal, the stepping motor driving device including a phase matching unit that matches, at a time when there is a possibility that a rotor and a phase signal are out of phase with each other, phases of the rotor and the phase signal by applying at least one drive pulse after energizing the stepping motor for a predetermined time and applying a phase signal having a predetermined duration for a final pulse.