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What is the Definition of right-handed system / left-handed systems in SCARA and 6 Axis robots?

For a SCARA robot and a 6-axis vertically articulated robot, the posture of the robot is controlled by the right-handed system or the left-handed system.

 SCARA robot

The right-handed system and the left-handed system used in a SCARA robot are defined as shown in the figures. Since the direction in which the elbow joint is bent changes depending on the selected handed system, select the handed system so that the robot arm does not interfere with the peripheral equipment .

 Right-handed system This refers to a state where the axis of the elbow joint is bent to the left. 

 Left-handed system This refers to a state where the axis of the elbow joint is bent to the right.

 6-Axis vertically articulated robot

The right-handed system and the left-handed system used in a 6-axis vertically articulated robot are defined as shown in the figures. Since the direction in which the joint of the fifth axis is bent changes depending on the posture of the robot, select the handed system according to the posture of the robot. If the handed system is not selected properly, the robot may cause unexpected movement.