Abstract: A trajectory control device includes: a contact sensor that can contact side surfaces of a workpiece; an actuator that moves a trajectory tracking member and the contact sensor; and a trajectory controller that calculates XY coordinates of a trajectory on the workpiece that is placed in an arbitrary position, by transforming XY coordinates of the trajectory on the workpiece in a reference position, based on positional information about the side surfaces of the workpiece in the reference position and positional information about the side surfaces of the workpiece placed in the arbitrary position. The positional information about the side surfaces of the workpiece placed in the arbitrary position is obtained by the contact sensor.

Abstract: A trajectory control device includes: a contact sensor that can contact side surfaces of a workpiece; an actuator that moves a trajectory tracking member and the contact sensor; and a trajectory controller that calculates XY coordinates of a trajectory on the workpiece that is placed in an arbitrary position, by transforming XY coordinates of the trajectory on the workpiece in a reference position, based on positional information about the side surfaces of the workpiece in the reference position and positional information about the side surfaces of the workpiece placed in the arbitrary position. The positional information about the side surfaces of the workpiece placed in the arbitrary position is obtained by the contact sensor.

Abstract: A clamp apparatus has a lower body. A rotary driving source driven by an electric signal, a pump mechanism having a pressure oil-sucking/discharging mechanism energized/deenergized by the rotary driving source, a cylinder mechanism provided with a piston for moving in an axial direction in accordance with supply of pressure oil, and an accumulator for retaining the pressure oil are integrally assembled to the lower body.

Abstract: A clamp apparatus has a lower body. A rotary driving source driven by an electric signal, a pump mechanism having a pressure oil-sucking/discharging mechanism energized/deenergized by the rotary driving source, a cylinder mechanism provided with a piston for moving in an axial direction in accordance with supply of pressure oil, and an accumulator for retaining the pressure oil are integrally assembled to the lower body.

Abstract: The discharge pressure value is made to smoothly approach the predetermined pressure value and once the discharge pressure value reaches the predetermined pressure value, the fluctuation of the discharge pressure value is decreased.

Abstract: Rotary motion of a motor of an electric actuator is converted into rectilinear motion with a small sliding resistance by the aid of a ball screw and a feed nut. On the other hand, a control apparatus for controlling the electric actuator comprises memory groups composed of memories to indicate displacement positions of a displacement member. The memory groups include a starting point memory. If a controller selects the starting point memory, the control apparatus displaces the displacement member to a starting point position. Therefore, it is unnecessary to provide any dedicated signal line for displacing the displacement member to the starting point position. It is possible to decrease the number of signal lines connected to the control apparatus.