A control method controls a movable member of an excavator including a movable member holding a load, an actuator with electric motor and static brake, a control unit and a motion sensor unit. Static brake and electric motor generate respectively an upper threshold brake force and an upper threshold motor force. The control method includes: an immobilization step: static brake generates the upper threshold brake force and the electric motor is stopped; a slippage detection step: the control unit detects whether electric actuator is moving despite the static brake, in case the electric actuator is moving, a motor energizing step: electric motor generates a motor force equal or superior to upper threshold brake force in a direction opposite to the slippage direction, and after the motor energizing step, a brake release step: the control unit releases the static brake.