Optical CMM Gauge Capability Evaluation for Sub Millimeter Molded Features
Optical CMM capability on sub-millimeter molded features requires material-specific bias correction and telecentric backlighting to maintain GR&R under 20%.
Type I Study
Meaning
Short term trials evaluate the inherent capability of a measurement system by using a single operator to measure a single master part multiple times. A type i study determines if the instrument is capable of reaching the necessary precision before human variation is introduced.
Equipment Evaluation
Statistical analysis of the results identifies the amount of bias and the repeatability of the tool. During a type i study, the goal is to see how much the measurement drifts over a short period of time. This assessment is the first step in qualifying a new piece of inspection equipment for the factory floor.
Measurement Potential
Comparison of the tool variation against the part tolerance shows the best possible performance the system can achieve. If a type i study shows that the tool consumes more than fifteen percent of the tolerance, it will likely fail a full gauge study later. This data helps engineers decide if the instrument is suitable for the intended application.
Verified Accuracy
Regular performance of these tests ensures that the gauging system remains within its calibrated limits. Because a type i study is fast to execute, it can be used as a daily check to verify that a machine is still producing reliable numbers. This process provides a quick confirmation of system integrity between formal calibration events.