Abstract: There is disclosed in this application an industrial robot comprising: a first arm pivotally supported at its one end for rotation around a first axis; a second arm pivotally supported at its one end by the other end of the first arm for rotation around a second axis parallel to the first axis; a wrist mechanism carried by the free end of the second arm and having at least one degree of freedom; and driving motors for driving the first arm, the second arm and the wrist mechanism, respectively; wherein at least one of the first arm and the second arm is connected to the drive motor through a double link mechanism having a phase difference.

Abstract: An industrial robot comprising: a base; a stand rigidly erected on the base; a shoulder securely mounted on the stand; a first arm consisting of upper and lower levers with the base portion pivoted to the shoulder so that the arm can be turned about a first vertical axis; a second arm having its one end pivoted to the other end of the first arm between the upper and lower levers so that the second arm can be turned about a second vertical axis; a vertically movable shaft so supported by the second arm as to allow the linear movement of the shaft along a third vertical axis; a rack parallel to the vertically movable shaft; a guide means for guiding the rack relative to the second arm in only the vertical direction; a coupling means for connecting the vertically movable shaft and the rack at their both ends; a first drive means secured to the shoulder to rotate, through a first power transmission means, the first arm about the first vertical axis; a second drive means secured to the shoulder to rotate, through

Abstract: A method of controlling an industrial robot wherein velocities of the actuators for the robot are based on the velocity of a robot hand moving along a predetermined path of travel. When the velocity of any single actuator exceeds its ability, the velocities of the actuators are revised so as to bring the velocities of all the actuators within their abilities, thereby revising the velocity of the robot hand along its path of travel. Calculation of the velocity of each actuator may be carried out based on the position and posture of the robot hand and a Jacobian matrix.