| 摘要 |
PROBLEM TO BE SOLVED: To suppress heating of a motor driver in a unipolar two-phase stepping motor drive unit.SOLUTION: A cable 21 connecting a motor 31 and a motor driver 11 is a lead wire group formed from a plurality of lead wires, and (1) a lead wire belonging to a lead wire group for connecting one end of an A-phase coil 33 and the driver and a lead wire belonging to a lead wire group connecting another end of the A-phase coil and the driver, (2) a lead wire belonging to a lead wire group connecting one end of an AB-phase coil 34 and the driver and a lead wire belonging to a lead wire group connecting another end of the AB-phase coil and the driver, (3) a lead wire belonging to a lead wire group connecting one end of a B-phase coil 35 and the driver and a lead wire belonging to a lead wire group connecting another end of the B-phase coil and the driver, and (4) a lead wire belonging to a lead wire group connecting one end of a BB-phase coil 36 and the driver and a lead wire belonging to a lead wire group connecting another end of the BB-phase coil and the driver, are made adjacent to each other. |
