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News — robotic control

Accuracy vs repeatability; why the difference matters.

cad cam repeatability robot accuracy robotic control robotics

When robots are programmed point to point, it does not matter where the robot thinks it is. The encoders give rotational positions for each axis that are very accurate and allow the robot to return to the position precisely. This ability is called repeatability and usually quoted by robot manufacturers. It is also usually very good- under 0.1mm. However accuracy is different. If you specify the robot to move from a point, to a position not previously specified, (say 500mm in one direction) the precision with which it does this is the accuracy. This is not often quoted by robot...

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