Abstract: A hydraulic source(20) comprises a hydraulic pump(62) driven by a motor(61), which operates based on the power and control data from a non-contact power feeding apparatus(30); a hydraulic tank(63); a solenoid valve(64); a relief valve(65); a hydraulic pressure gauge(66); a pilot check valve(67) for clamping and a pilot check valve(68) for unlocking that are interposed between the solenoid valve(64) and hydraulic cylinders(41a to 41d); a pressure switch(69) for clamping which is inserted into a piping for connecting the pilot valve(67) and the hydraulic cylinders(41a to 41d); and an pressure switch(70) for unclamping which is inserted into a piping for connecting the pilot check valve(68) and the hydraudic cylinders(41a to 41d). This hydraulic source is combined with a hydraulic machine for applications where jig or jigs move freely to promote automation of machining, assembly and inspection of workpieces on a moving body.

Abstract: A noncontacting power transfer apparatus, a noncontacting signal transfer apparatus, to be referred to below as a power coupler and a signal coupler, respectively, and a separate machine apparatus that uses these couplers are disclosed. The power coupler is composed of a primary side and a secondary side that are fixed to a static unit and rotatable unit of the machine apparatus, respectively, such that its output does not vary with arbitrary rotation by the rotatable unit. The signal coupler is composed of receiving side portion having a electric-to-light conversion device that converts an electric signal to an optical signal of rotational symmetry relative to the axis of rotation of the rotatable unit and a photoelectric conversion device that converts an optical signal to an electric signal. Accordingly, the rotatable unit can be supplied with power from the static unit even while rotating, and moreover, can communicate with the static unit.

Abstract: A noncontacting power transfer apparatus, a noncontacting signal transfer apparatus and a separate machine apparatus that uses these couplers are disclosed. The power coupler is composed of a primary side and a secondary side that are fixed to a static unit and rotatable unit of the machine apparatus, respectively, such that its output does not vary with arbitrary rotation by the rotatable unit. The signal coupler is composed of receiving side portion having a electric-to-light conversion device that converts an electric signal to an optical signal of rotational symmetry relative to the axis of rotation of the rotatable unit and a photoelectric conversion device that converts an optical signal to an electric signal. Accordingly, the rotatable unit can be supplied with power from the static unit even while rotating, and moreover, can communicate with the static unit. Further, the rotatable unit can be easily attached to the static unit and can be removed from the static unit.

Abstract: A noncontacting power transfer apparatus, a noncontacting signal transfer apparatus(to be referred to below as a power coupler and a signal coupler, respectively), and a separate machine apparatus that uses these couplers are disclosed. The power coupler is composed of a primary side and a secondary side that are fixed to a static unit and rotatable unit of the machine apparatus, respectively, such that its output does not vary with arbitrary rotation by the rotatable unit. The signal coupler is composed of receiving side portion having a electric-to-light conversion device that converts an electric signal to an optical signal of rotational symmetry relative to the axis of rotation of the rotatable unit and a photoelectric conversion device that converts an optical signal to an electric signal. Accordingly, the rotatable unit can be supplied with power from the static unit even while rotating, and moreover, can communicate with the static unit.

Abstract: A connector divice which can stably supply electric power and send and receive signals in a contactless way, i.e., without using any electrode contact, and without strict alignment of the device.

Abstract: A linear-motion contactless power supply device for supplying electrical power from a stationary unit to a movable unit without direct contact; the stationary unit being a cylindrical primary conductor to which a high-frequency alternating current is supplied; the movable unit being provided with a secondary conductor which is isolated from the primary conductor and which is arranged coaxially with the primary conductor so as to be slidable in the longitudinal direction of and with respect to the primary conductor and also provided with a high-frequency toroidal core which is arranged so as to cover the secondary conductor from the outside.

Abstract: A robot which does not require electric wires (power transmission wires and signal wires) for interconnecting joint shafts is provided. An electrodeless unit for transmitting electric power by way of high-frequency electromagnetic induction and a unit for transmitting signals by way of optical transmission or high-frequency electromagnetic induction are installed in either a reduction gear that is coupled to the shaft of a motor for actuating each of the shafts of the robot or a direct-drive motor. Electric power or signal wires are drawn through a groove or hollow defined in an output shaft of the reduction gear or the direct-drive motor. Information produced ahead of the output shaft is fed back over signal wires that are drawn through the groove or hollow defined in the output shaft.

Abstract: A noncontacting power transfer apparatus, a noncontacting signal transfer apparatus, and a separate machine apparatus that uses these couplers are disclosed. The power coupler is composed of a primary side and a secondary side that are fixed to a static unit and rotatable unit of the machine apparatus, respectively, such that its output does not vary with arbitrary rotation by the rotatable unit. The signal coupler is composed of receiving side portion having a electric-to-light conversion device that converts an electric signal to an optical signal of rotational symmetry relative to the axis of rotation of the rotatable unit and a photoelectric conversion device that converts an optical signal to an electric signal. Accordingly, the rotatable unit can be supplied with power from the static unit even while rotating, and moreover, can communicate with the static unit. Further, the rotatable unit can be easily attached to the static unit and can be removed from the static unit.

Abstract: First, second, and third compensation signals are generated from the information on the position and speed of the first servo system having a speed control loop as a minor loop. The speed error of the speed control loop of the second servo system which has the speed control loop as a minor loop and uses a signal obtained by sampling the position detection signal, executing a digital calculation process on the sampled signal to obtain a speed signal and integrating the speed signal as a position command signal or a signal obtained by sampling the position detection signal of the first servo system and executing a digital calculation process on the sampled signal as a position command signal is compensated by the first, second and third compensation signals. Thus, even in cases where the acceleration and deceleration of the first servo system are executed even at constant power, positional synchronizing error is not generated.

Abstract: When a workpiece is cut or otherwise machined by a machine using a servo motor control apparatus having a position feedback loop, a velocity feedback loop, and a current feedback loop, it is the common practice to preset the instructed current value to a voltage corresponding to friction torque when rotation of the motor is started or reversed. This is to compensate for the response delay of the motor introduced by the friction torque. The present invention relates to improvements in this technique. After the instructed motor velocity changes from a positive value, to a negative value or vice versa, or after the detected motor velocity changes from a positive value to a nonpositive value or from a negative value to a nonnegative value, the value of the integration element of a velocity control portion is reversed according to a function. The obtained output value is added to the instructed current value or to the integration term to compensate for the response delay, thus reducing machining error.