Leading manufacturers are constantly seeking out ways to increase yield, improve quality and reduce operating costs. Automatic gauge control using mass flow and elongation control has become a standard controls technique used in cold rolling to achieve these goals. Within these techniques, laser velocimeters are well known for improving control by offering a more accurate strip speed measurement as compared to contact methods, especially during acceleration/deceleration transition events in mill speed. This paper discusses differences between the two measurement techniques, as well as best practices for configuring, installing, integrating and optimizing a laser velocimeter measurement signal.
This article was published in Iron & Steel Technology, February 2019.