Out-of-round rolls

1. Usually results from squeezing rolls too hard with clamp trucks or by dropping the rolls.
2. On winders, this condition is caused by:
–varying tension due to bent unwind shafts.
— faulty tension control.
— variations in the electrical drive.
— mechanical binding of machine parts.
3. When equipment is at fault, it should be repaired or replaced.
4. Running winder at reduced speed and using riding-roll pressures that prevent the windup roll from bouncing will minimize the number of out-of-round rolls.