| 摘要 |
A stepping motor control apparatus that is able to electrically detect the load of the stepping motor and effectively prevent step-outs by means of an inexpensive configuration. The stepping motor control apparatus is equipped with a microcomputer (10) that outputs a command pulse, a chopper-type constant current driver (20) that outputs a drive current that corresponds to the input command pulse to the stepping motor (5) and outputs a chopper signal to keep the output drive current fixed, and a load detection circuit (30) that detects the chopper signal to detect the load of the stepping motor (5). The load detection circuit (30) is equipped with a waveform shaping circuit (50) that makes the chopper signal waveform continuous to convert it to a pulse or voltage, and it detects the load of the stepping motor by means of the width of the pulse or the voltage value. <IMAGE> |
