| 摘要 |
Apparatus is disclosed for controlling the movement of a movable element between an initial starting position and a final stopping position. The apparatus comprises drive means coupled to the movable element and responsive to motor drive signals for moving the movable element along a predefined path between said starting and stopping positions; and first generating means for generating a first command velocity signal having a first state when the actual velocity of the movable element exceeds a predetermined value and a second state when the actual velocity of the movable element is less than the predetermined value. A controller periodically senses the state of the first command velocity signal when the movable element has less than a first predetermined distance and greater than a second predetermined distance to travel to the final stopping position, and controls the levels of the motor drive signals to cause (a) the acceleration of the movable element by the drive means when the first command velocity signal is sensed at its first state, and (b) the deceleration of the movable element by the drive means when the first command velocity signal is sensed at its second state.
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