Xerox 3300MFP Service Manual - Page 55

Transfer Assembly Theory of Operation The Transfer Assembly consists of the Transfer Roller and gear. The transfer roller delivers the toner from the OPC drum to the paper. ■ TR Voltage: +1.3 KV ± 5% (based on 200 ΜΩ, in accordance with media area, Transfer table) ■ -1.20 KV ± 10% (In cleaning) ■ Transfer Efficiency: 85% or more (All environment: preferable media) ■ Voltage System: Voltage PWM Control System ■ Transfer Roller ■ Hardness: 40 °C ± 3% (ASKER-C) ■ Valid length: 224.2 + 0.5/-0 mm ■ OD: ϕ 15.0 ± 0.5 mm ■ SHAFT Material: SUM -24L + Non-electrolysis Ni. Coating ■ Life Span: Print over 70,000 sheets (in 15 ~ 30 °C) Driver Assembly Motor ■ Spec: BLDC φ 62 + PM φ 55 Motor (2-2 Bipolar) + PM φ 42 Motor (2-2 Bipolar) ■ Pull-Out Torque: ■ BLDC φ 62: 1500 gf.cm (based on actual value) or more (1342.4 rpm, 1.8 A) ■ PM φ 55: 1490 gf.cm (based on actual value) or more (711 pps, 0.9 A) ■ PM φ 42: 240 gf.cm (based on actual value) or more (1850 pps, 0.6 A) ■ TORQUE MARGIN (Tp/o VTsys): BLDC φ 62 Motor: 1500/1100 gf.cm = 1.36 ■ PM φ 55 Motor: 1490/1053 gf.cm = 1.41 ■ PM φ 42 Motor: 240/165 gf.cm = 1.45 ■ Driving Frequency: BLDC φ 62 Motor: 1342.4 rpm (1006.8 Clock) ■ PM φ 55 Motor: 888.75 rpm (711 pps) ■ PM φ 42 Motor: 1156.25 rpm (1850 pps) ■ It is a power delivery unit by gearing: BLDC φ 62 Motor -> Pickup/Feeder/ Print Cartridge ■ PM φ 55 Motor -> Fuser/Exit ■ PM φ 42 Motor -> Duplex Phaser 3300MFP Service Manual 2-13