| 摘要 |
PURPOSE:To reduce power consumption required for driving of pump in a recovery unit, to shorten the record recovery time and to improve cost performance by performing control for increasing torque of a driving means upon dead lock of the pump constituting the recovery unit. CONSTITUTION:Drive source (pulse motor) for a recovery unit is operated with a pulse rate No when a pump operates normally without causing dead lock, whereas it is operated with a pulse rate N1 upon occurrence of dead lock. Consequently, when the motor is initially driven with the high pulse rate N0 and a home position switch 54 is turned ON, following recovery control is carried out under control with pulse rate N0. If the home position switch 54 is not turned ON, it is judged that the pump is in dead lock and the pulse rate N1 is lowered to N1. When dead lock is eliminated and the home position switch 54 is turned ON, the pulse rate is returned to the higher rate N0 and the pump 28 is driven. By such arrangement, recovery sequence is finished earlier and recording speed is improved. |
