In a xerographic printer including a fuser having a heating element, a first
predetermined
power level is applied to the heating element. The voltage associated with the
heating element is measured, yielding an output code which is applied to a look-up
table. The output of the look-up table relates to power to be applied to the heating
element in a time interval T going forward: the output sets forth what power level
is to be applied to the heating element for a smaller interval t within interval
T, and what power level is to be applied to the heating element for the balance
of the interval T.