Technical Bulletin PAGE: 2/9
Reissued:23-Feb-12
Model: Aries-P1.5/C1.5 Date: 23-Jan-12 No.: RM077058a
Cause
After shaping the GEAR:DEVELOPMENT ROLLER Z29, the plastic around the gear
shrinks. Refer to figure 1 below
The plastic around the gear breaks (refer to the red lines in figure 2) and creates a
backlash. Then, the development roller does not rotate uniformly, which creates the 8mm
pitch banding.
Figure 1: Layout of gears inside the drum drive unit
Figure 2 Composition of GEAR : DEVELOPMENT ROLLER Z29
STEPPER
MOTOR:MM56:O/C
GEAR:IDLER:Z57:DEVELOPMENT:ASS'Y
JOINT (Development Roller
Drive)
COVER
SHAFT:AUGER:COLLECT:JOINT
JOINT (Auger Drive)
GEAR:IDLER:Z31:ASS'Y
GEAR:DEVELOPMENT
ROLLER:Z29
GEAR:IDLER:Z66:LOWER:ASS'Y
GEAR:IDLER:Z66:LOWER:ASS'Y
Parallel Pin: Prevent the
ear to rotate
The bearing is pressure fit
The plastic physically contact the bearing
Plastic around the
ear breaks
Br
k
n Ar
GEAR:DEVELOPMENT ROLLER:Z29:
Gear is created by Sintering
Blue area is plastic created by monolithic molding
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