Common roll forming problem : Roll forming machine troubleshooting LOTOS

Common Problems with a Roll Forming machine: 1. Twist twist in the rollformed part is like a corkscrew effect and is often caused by excessive forming pressure and asymmetrical profiles. generally, twists can be held to less than 5 degrees in 10 feet or 3 meters. 00:57 TWIST PROBLEM 2. Bow The vertical plane deviation from a straight line can be a cross or longitudinal bow, it is caused by uneven vertical gaps on symmetrical crosssections and uneven forming areas on asymmetrical sections in the general bow can be held to plus or minus 1, 8 inch in 10 feet or 3mm in 3 meters. 4:05 BOWING PROBLEM 3. camber Camber is the deviation of a side edge from a straight line measured prior to roll forming. The maximum allowable camber is 3, 8 of an inch in 10 feet or 9. 5 mm in 3 meters. Excessive camber induces curved bow and twists in the finished roll from parts. 7:14 CAMBE PROBLEM 4. Edge wave Edge waves easily happen in the rollforming process of thin steel parts, which greatly