There are three primary methods of controlling length on a roll former – gauge bars, positive stop, and encoders. The first two methods are completely mechanical, with the last being electro-mechanical.
Length Control Methods
- Length Gauge Bar
- Positive Stop
Length Gauge Bars and Positive Stops
Gauge bars and positive stops have been around since the start of flying die applications. They are probably the oldest method of length control for roll forming applications, but they’re still in use today. That’s because they typically offer the best accuracy and consistency for the lowest cost.