Abstract: An electric actuator includes a motion conversion mechanism and a position detector. The motion conversion mechanism converts rotation of a rotary shaft of a motor into linear motion of an output shaft. The position detector detects a permanent magnet M, which moves integrally with the output shaft. A motor control portion controls the motor based on commands from a host command unit. A control program for controlling the motor includes, as control modes, six fluid pressure cylinder modes, according to which the motor is controlled. Specifically, each of the control modes corresponds to one of the cases where the fluid pressure cylinder is controlled by three solenoid valves, or a two-position single solenoid valve, a two-position double solenoid valve, and a three-position double solenoid valve. The motor is controlled according to the selected control mode.

Abstract: An electric actuator includes a motion conversion mechanism and a position detector. The motion conversion mechanism converts rotation of a rotary shaft of a motor into linear motion of an output shaft. The position detector detects a permanent magnet M, which moves integrally with the output shaft. A motor control portion controls the motor based on commands from a host command unit. A control program for controlling the motor includes, as control modes, six fluid pressure cylinder modes, according to which the motor is controlled. Specifically, each of the control modes corresponds to one of the cases where the fluid pressure cylinder is controlled by three solenoid valves, or a two-position single solenoid valve, a two-position double solenoid valve, and a three-position double solenoid valve. The motor is controlled according to the selected control mode.