Chapter 88-2F-8-28.2 Various Control Mechanisms8.2.1 Controlling the Speed of the Fixing Film8.2.1.1 Controlling the Fixing Film Speed 0017-5470iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iThe 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 keepingthe 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 1second lapses after the motor starts rotating and ends when the trailing edge of the last sheet has passed through the fixing nipper.F-8-3[1] Film rotation detection signal (FILM_SENS): Set to 1 and 0 alternately when the fixing film is rotating.[2] Rotation cycle measurement mark8.2.2 Controlling the Fixing Film Temperature8.2.2.1 Outline 0017-5473iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iThe surface temperature of the fixing heater is detected to control the fixing heater drive signal so that the fixing heater temperature becomes the target temperature.The temperature of the fixing heater is detected by the thermistor (TH1/TH2) provided on the fixing heater. If the surface temperature rises, the resistance of thethermistor lowers and the voltage of the fixing heater temperature detection signal (M_TH/S_TH) also lowers.[1] Fixing film speed sensor [4] Thermo-switch (TP1)[2] Sub thermistor (TH2) [5] Pressure roller[3] Main thermistor (TH1) [6] Fixing film unit[1][2][3][4][5][6]DC Controller PCB[1] FILM_SENS[2]J217
