To carry out the tuning control of the position and speed of a plurality of actuators by arranging a hydraulic distributing shaft on both ends of a plurality of eccentric shafts, arranging a liquid rotary joint on the outer peripheral part thereof, and connecting a taking-out shaft to the outside from one end of a rotary shaft part.

A ball screw 28 is rotated by the rotation of a motor 34 for driving a flow rate control valve, a balls screw nut 29 is moved in the fore-and aft direction to move a spool 26, and operating liquid of a main port 19b is supplied to a hydraulic pump.motor passing a liquid rotary joint. An eccentric core shaft 2a of the hydraulic pump.motor is rotated, a liquid-operated distributing shaft 1b, and a taking-out shaft 39 which are connected to the eccentric shaft 2a are also rotated, a ball screw nut case 30 and the ball screw nut 29 are rotated through a gear 32, and a gear 31, the spool 26 is moved into the fore-and aft direction, and the hydraulic pump.motor is rotated by the motor 34 for driving the flow rate control valve. After that, the flow rate control valve 24 is closed. As a result, rotary position and rotary speed of a tuning hydraulic converter can be controlled freely.