689.x Feeder: Too many sheets out of timing tolerance
Description
External sheet feeding to rollformer.
The sheet from the external sheet feeding system has to take place at the same time as the infeed unit of the welding machine. This monitoring process helps avoid faults occurring during round-in. Sheets that detected as being out of the tolerance range in the rollformer are ejected via the double-sheet ejector.
Remedy
- Carry out a rounding check → Set up sheet feed.
- Check external sheet feed.
- Check the digital input.