A control device for tuning a servo motor is suggested. The control device comprises a calculation unit configured to determine a current proportional speed gain of the servo motor and to calculate a stabilization time ratio based on a current stabilization time of the servo motor and a target stabilization time, a determination unit configured to select a gain determination process based on the calculated stabilization time ratio, to determine a next proportional speed gain using the selected gain determination process starting from the current proportional speed gain, wherein the calculation unit is further configured to update parameters of the servo motor according to the determined next proportional speed gain, and a control unit configured to generate a control signal for controlling the servo motor for driving a load based on the updated parameters.