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How Repeatability Is Measured

Published: Publisher: Zhilianhai Robotics News

A practical method

  • Choose a fixed measurement point with a dial gauge or dedicated fixture.
  • Run the same program at least 30 times and record every deviation.
  • Report the maximum and the distribution, not the best single result.
  • Repeat with and without the payload attached.

What disturbs the result

FactorEffect
Temperature changeThermal distortion of arm and workpiece
Loose baseWhole-machine shift
Load and speedLarger dynamic error
PoseError grows near singularities

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