Maxson Automatic Machinery Company has incorporated into the web conditioning system of its high speed precision sheeters a dancer roll design. The enhancement allows the rotary cutter to accurately maintain sheet length at high speeds regardless of the concentricity of the roll being converted. Rolls damaged during handling can affect sheet length accuracy and operating speed. For example, an egg-shaped roll caused a taut-slack web condition as it is unwound. This produces a series of short and then long sheets. Operators compensate for egg-shaped rolls by ru nning the sheeter slower to lessen the load-unload condition.