Apparatus having a driven member and a drive controller therefor

An apparatus comprising:

• a member to be driven;
• an actuator that in response to a pulse signal drives said to-be-driven member to move by an amount proportional to a given number of pulses;
• a position detector that detects a position of said to-bedriven member in predetermined detection steps;
• a determinator that determines a target position up to which said to-be-driven member is to be moved;
• a controller that performs measurement of relation between a driving amount of said actuator and a movement amount of said to-be-driven member, controls said actuator up to a detection-step position immediately before said target position by closed-loop control in accordance with a detection result from said detector, and controls said actuator from that detection-step position to the target position by open-loop control in accordance with a result of said measurement.