The rotation cycle is measured with reference to the mark provided at the end of the fixing film to rotate the fixing drive motor at the optimum speed, thus keeping

the paper feed speed constant. Measurement of the cycle of each rotation (excluding the initial rotation and post-rotation) of the fixing drive motor starts when 1

second lapses after the motor starts rotating and ends when the trailing edge of the last sheet has passed through the fixing nipper.

[1] Film rotation detection signal (FILM_SENS): Set to 1 and 0 alternately when the fixing film is rotating.

[2] Rotation cycle measurement mark

8-2

[3]

[2]

[1]

Fixing film speed sensor

Sub thermistor (TH2)

Main thermistor (TH1)

[2]

J217