Abstract: A robot system includes a conveyor, a robot, a speed calculation circuit, and a robot control circuit. The conveyor is configured to convey a workpiece at a conveyance speed. The robot is configured to work on the workpiece while the workpiece is conveyed by the conveyor. The speed calculation circuit is configured to calculate the conveyance speed. The robot control circuit is configured to control a working speed of the robot according to the conveyance speed calculated by the speed calculation circuit.

Abstract: An industrial communication system includes multiple industrial instruments connected in series and including a first industrial instrument and a second industrial instrument connected to the first industrial instrument.

Abstract: A robot system includes a robot, a robot controller, and a portable remote operating device. The portable remote operating device includes a display unit, an acquiring unit, and a display switching unit, and is connected to the robot controller. The acquiring unit acquires a reception/transmission process and a customized screen, which are created by a user. The display switching unit switches between the customized screen and a previously-prepared standard screen at a predetermined time during the operation of the robot.

Abstract: In a positioner according to the present invention, the rotating table and a hollow shaft is rotated by a motor via a speed reduction gear. In such a configuration, an air tube and a cable which supplies the air or electric power used to operate a jib on the rotating table are provided via the rotary joint arranged at one end of the shaft. A communication device may be provided on the rotating table by detaching the rotary joint and arranging a composite curl cord. The communication device may be provided by the rotary joint and a wireless communication device without using the composite curl cord.

Abstract: A motor speed controller which detects the position y(i-k) of a motor at the time K.multidot.Ts (k.gtoreq.0, Ts: sampling period) ago from the present time (i) and feedback-controls the speed of the motor by using a motor speed feedback signal Vfb calculated based on the detection signal is provided with a means which calculates a torque command u(i) from a speed command and the motor speed feedback signal vfb, means which calculates the speed v(i-k) from the position y(i-k), means which stores the values of the speed v(i-m) (m=k, . . . , M') from M' sampling periods before to the time i-K, a predictor which predicts the speed prediction value v*(i+m) (m=-K+1, . . . , M) at the times up to M sampling periods after from the dynamic characteristic model of the motor, the torque command u(i), and the position y(i-K), and means which finds the speed feedback signal from formula: ##EQU1## where Wm and W'm represent weight factors.