Run a Gage R&R Sanity Check
Identify whether variation in CNC inspection data may come from the measurement system.
Two operators disagree by 0.011 mm on a precision bore with a 0.020 mm tolerance band, and the team is considering an offset change. Gage R&R: separate repeatability and reproducibility before acting on measurement data The common trap is to average the two readings or pick the reading from the more senior operator, then adjust the CNC process. That treats the gage disagreement as if it were part movement and can create defects from measurement noise. Prepare Deburr and clean the bore, let the part stabilize, clean the gage contacts, and verify zero against a master. Repeatability can be destroyed…
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