Wire strands separation is a normal defect during wire striping, how to judge it is accept or not, we always follow IPC-A-620 spec.
Refer to below
Target - Class 1,2,3
• No birdcaging.
Acceptable - Class 1,2,3
• Wire strands have separation (birdcaging) but do not exceed
the lesser of:
• One strand diameter or
• Do not extend beyond wire insulation outside diameter.
Acceptable - Class 1
Process Indicator - Class 2
Defect - Class 3
• Wire strands have separation exceeding one strand diameter
but do not extend beyond wire insulation outside diameter.
Acceptable
Acceptable - Class 1
Defect - Class 2,3
• The general spiral lay of the strands has not been maintained.
• Wire strands extend beyond wire insulation outside diameter.
Defect - Class 1,2,3
• Wire strands are kinked.
