ACTUATOR CONTROLLER

PROBLEM TO BE SOLVED: To reset the origin of an actuator in a driven means appropriately by correcting the conditions for origin resetting operation depending on the fluctuation in the environmental conditions, e.g. power supply voltage, thereby suppressing noise. SOLUTION: When a car air-conditioner 1 is controlled automatically, a total thermal load signal T is operated from a detection signal and a set signal and each machine is controlled selectively. For example, a drive signal is delivered to the actuator ACT 29 of a mixed door 9 according to an opening set by the signal T. In an origin reset control for returning the door 9 surely to the initial position, a rest position for abutting the door 9 during initial reset control is set the a given number of steps of the ACT 29 and an ACT torque for driving the door 9 to the set position is set in reverse proportion to the magnitude of power supply voltage. A correction amount is set for the amount of driving back the ACT to the initial position depending on the magnitude of power supply voltage.