| 摘要 |
A method for driving a stepping motor which performs a micro step driving of the present invention makes a rise through rate variable by matching a step difference related to a change in a value of current when a value of current caused to flow in the stepping motor is increased, and makes a fall through rate variable by matching a step difference related to a change in a value of current when the value of current caused to flow in the stepping motor is decreased. Particularly, at a point of the change of increase/decrease of the value of current caused to flow in the stepping motor, the rise through rate and the fall through rate matched with the step difference related to the change in the value of current are set, and when the value of current let flow in the stepping motor became a constant value, the rise through rate and the fall through rate are made small.
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