Color Control System for Paper Machines, 1995 Process Control, Electrical & Information Conference Proceedings
Shih-Chin Chen
ABB Industrial Systems Inc.
It is a difficult task for a paper machine operator to manually maintain a uniform shade of color in a paper-making process. Very commonly, a paper machine producing different shades makes significant colored broke during a manual shade change. An automatic control system is necessary to maintain a more consistent color production and to reduce broke during the shade changes. This paper describes a color control system designed to meet these objectives. The color control system utilizes an on-line color measurement to control colorant additions to a paper making process. The article describes an on-line color measurement, a multivariable color-control approach, and a system implemented to manage shade control for paper machines. The coloring improvements made by this system are also included in the discussions.
Color Control System for Paper Machines, 1995 Process Control, Electrical & Information Conference P