Chapter 10 Troubleshooting
PAGE 10-20
● Diagnosing your Rejects – Reject Reasons
Now that you have invested in a highly precise piece of equipment to improve your quality and/or detect
fastening anomalies, what do you do with your fastening results? Understanding the equipment and setting
up limits to detect fastening anomalies requires some basic knowledge of the equipment and fastening,
however this document will help diagnose the fastening reject data that is seen when monitoring the
fastening data.
Some of the explanations below are obviously simple, but use this simply as information to help understand
what the equipment may be detecting (telling you).
(Note: This is only meant as a guide and may not contain all possible reasons – each application is different)
The chart below shows the type of Fastening Reject you may see with some common causes of the reject.
(Yellow “X” may or may not be associated with the main reject)
Note: This is not all of the Rejects that may occur, only showing the most common
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