| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for detecting commutation abnormality. SOLUTION: A polarity discriminating means 10, which is so constituted that a counter-electromotive force voltage of each phase outputted from a three-phase HBM 70 is made capable of input, a real communication mode generating means 30, a communication mode estimating means 20, a commutation mode comparing means 40 having an abnormal time processing part 45, a commutation signal generating means 50, and an inverter 60 supplying a drive signal to the three-phase HBM 70, are installed. A drive mechanism 80 for moving a carriage 90 of printer equipment is linked with the three-phase HBM 70. BY having the three-phase HBM 70 drivingly controlled, the carriage 90 is moved and controlled. |
