Operation; Pc Drum Drive Mechanism; Pc Drum Phase Control - Develop QC 2235 Plus Service Manual

Photo Conductor section
6.3

Operation

6.3.1

PC Drum Drive mechanism

• Two independent PC Drum motors are used for the drive mechanism to suppress incor-
rect color registration and uneven pitch.
• The Color PC Drum Motor drives the PC Drums/Y, M, and C, while the Bk PC Motor
drives the PC Drum/Bk.
• Gears having a large diameter are used to enhance rotating accuracy of the PC Drums.
• The use of gears having a large diameter provides a large number of gear teeth, which
suppresses uneven pitch and eccentricity.
• Drive is transmitted to each of the PC Drums when the triangular coupling is engaged
with the mating part that also has a triangular shape.
Large-diameter Gear
Shaft
Coupling
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6.3.2

PC Drum Phase control

• To enhance image quality, sensors are used to detect operating conditions while the PC
Drum turns, thereby providing drum drive control.
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
Color PC Drum Motor (M5)
Bk PC Motor (M7)
Coupling
2-16
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