Electrical actuator

An electric actuator that has a main body and can be used in place of a fluid pressure cylinder that is a part of an automated machine and has a piston rod, reciprocation of which is controlled through an electromagnetic valve, the electric actuator comprising:

• a movable body that can be moved linearly, the movable body corresponding to the piston rod of the fluid pressure cylinder;
• a motor having a rotary shaft;
• a motion conversion mechanism that converts rotation of the rotary shaft of the motor to linear motion of the movable body;
• a motor control circuit that controls the motor;
• and
• a memory that stores a control program for controlling the motor control circuit,
• wherein the control program has, as a control mode for controlling the motor, a fluid pressure cylinder mode, in which the electric actuator actuates the movable body in a manner corresponding to the manner in which the piston rod is actuated when the fluid pressure cylinder is controlled through the electromagnetic valve, and wherein the motor control circuit controls the actuation and stopping of the movable body in the fluid pressure cylinder mode.