MALFUNCTION LOAD DETECTOR OF COPYING MACHINE

Japanese Patent JPS60229682

A

PURPOSE:To prevent a drive trouble due to an overload by measuring the magnitude of a load in the initial state of a driven copying machine. CONSTITUTION:When a fixing heater is fired by a fixing heater ON-OFF controller to arrive at the set temperature, a warmup is completed. After the warm- up is completed, an overload measuring subroutine is started, and 90% of rated voltage is applied to a main motor 27. At this time, the pulse number P1 from a pulse generator 39 is stored in a RAM52. A reference value setter 53 outputs 90% of the rated pulse number as a comparison reference pulse number P1S. A comparator 54 judges as an overload in case of P1