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| 1. Wrong thread dimension, follow step 1a to 1d |
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| 1 a. Profile depth too shallow |
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- Measure the insert offset versus the swivel axis and set the tool centred to the component.
Preferably use a thread whirling calculator
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| 1 b. Too narrow profile |
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- Increase or decrease tool setting angle
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| 1 c. Wrong outer diameter (OD) |
- Wrong diameter setting in the program
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- Adjust tool diameter and/or component diameter setting in the program
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| 1 d. Wrong thread length |
- Wrong tool Z setting in the program
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- Adjust tool Z setting in the program
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| 2. Faceted surface |
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- Reduce the tooth feed. Preferably use a thread whirling calculator
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| 3. Vibrations |
- Too high feed
- Bar too loose in guide bush
- Too long overhang of component
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- Reduce the tooth feed. Preferably use a thread whirling calculator
- Tighten the guide bush properly, or replace the bar (if bar is of too low dimensional quality)
- a) Move the whirling unit closer to the guide bush
b) Move the whirling ring closer to the guide bush, use one of following options:
- Insert an adapter/shim between the whirling ring and the whirling unit
- Change to a thicker whirling ring, often a engineered ring will be needed.
This will create a bigger offset to the swivel axis that will need to be compensated for.
Also ensure clearance for the component through the ring, adaptor/shim and drive unit.
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| 4. Insert wear |
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