A method of controlling tension in a material handling process. An error
signal of the process is determined. The velocity analog value of the
material is determined and an instantaneous integral gain is then
determined according to the velocity analog value. A proportional gain is
determined. A first material parameter threshold value is determined. A
first material parameter analog value is measured. The output of a
controller is then adjusted according to the error signal, the
instantaneous integral gain, and the proportional gain. The adjustment of
a process output according to the instantaneous integral gain is
controlled according to the relative values of the first material
parameter threshold value and the first material parameter analog value.