1. Perform contour comparison—identify discrepancies between the product and standard drawings.
2. Measure for missing holes.
3. Use the OK sample as the standard—compare it with the NG sample.
Product physical image
Measuring Result
Test results
Use the good products provided by the customers as a template and compare the defective products accordingly.
Ⅰ. There are 8 locations where the holes are missing for the defective products.
Ⅱ . A partial image of NG
Test Conclusion
COBEKK suggests that the solution should adopt the method of contour contrast to control the defects of the products.
