| 摘要 |
PURPOSE:To detect a load being smaller at a motor driving transmitting part, by comparing a rotating speed with a normal-load rotating speed of a motor. CONSTITUTION:A motor speed controller detects a motor rotating speed every time when a pulse interval is counted by a timer 129. A given light-load judgement time to be required from the starting to a steady rotational state and a normal load edge-to-edge time, i.e., a normal-load pulse intervals in the light- load judgement time, are set as motor control data, and a timer II 41 is used to judge whether the light-load judgement time has arrived or not. Moreover, a motor controller unit is provided for comparing the normal load edge-to-edge time with the time in a timer 129 when the timer II 41 indicates the light load judgement time. |
