| 摘要 |
PROBLEM TO BE SOLVED: To control a stepping motor with high accuracy by facilitating a change in reference voltage without complicated control. SOLUTION: This motor driving circuit 1 for driving the stepping motor 9 comprises a clock generating means 2 which generates a clock for operating the stepping motor 9 at a prescribed rotational speed, a counter 4 which counts the clock generated by the clock generating means 2, a memory 6 which stores data previously corresponding to the count value of the clock, a D/A converter 7 which sets reference voltage after the data is converted to the reference voltage, and a driving means 8 which constant-current driving the stepping motor 9 based on the reference voltage set by the D/A converter 7. |
