Web Tensiometer Frequency Response.

Proper web tension control throughout a rotogravure press is recognized as important for the proper maintenance of both color and cutoff register, and the reduction of paper breaks. Research aimed at the improvement of web tension control requires the dynamic measurement of web tension and experience has shown full width tensiometers to be the most suitable instrument for this purpose. In order to properly evaluate web tension measurements the dynamics or frequency response of the tensiometer system must be known. This paper presents a straightforward analytical method for the determination of the frequency response for the mechanical tension sensing roll arrangement of a typical tensiometer system. Experimental methods and results obtained for the evaluation of the frequency response of both the mechanical arrangement and amplifier-recorder system used in web tension research on rotogravure presses are then given.