Usually , it consists of moving the joystick around all of its axes to measure the maximum axis excursion values , no matter if the joystick uses analog signals ( from potentiometers ) or digital signals ( using microswitches or contacts ) . Calibration usually requires moving the joystick around all of its axes to measure the maximum axis excursion values , regardless of whether the joystick uses analog signals ( from potentiometers ) or digital signals ( using microswitches or contacts ) .