Method for controlling a fluid machine actuated by an actuator is provided, wherein the fluid machine comprises, a liner and a piston which together form a chamber and are configured to be in movement one with respect to the other, wherein the actuator comprises, in series: a rotary-shaft motor, a speed-reducing gearbox reducing the speed of the shaft of the motor, a mechanical coupling and a connecting rod. The method can include the steps of: determining the relative position of the piston or of the liner with respect to a critical position when the shaft of the motor is rotating at a first speed, and temporarily increasing the speed of the shaft of the motor according to the relative position of the piston or of the liner with respect to the critical position.