| 摘要 |
A stepping motor control circuit incorporates two sources of pulses for driving a stepping motor, one of which has a frequency greater than the maximum frequency which the motor can follow. A pair of shift registers are used for effecting acceleration and deceleration of the stepping motor, when the high frequency pulse source is used. A first shift register stores an acceleration pulse sequence, to supply pulses to the stepping motor at an increasing rate, after which pulses are supplied directly to the stepping motor from the high frequency pulse source. The second shift register is energized to apply deceleration pulses to the stepping motor. Pulses having a relatively low frequency are supplied directly to the stepping motor when only a small motor movement is required. |
