Fixing System; Adjusting The Lower Roller Pressure (Nip) - Canon ImageRunner iR8500 Series Service Manual

Chapter 14

14.6 Fixing System

14.6.1 Adjusting the Lower Roller Pressure (nip)

/ iR85+ / iR8070
The nip width must be as indicated in figure; if not, adjust it using the
pressure adjusting nut.
Feed
direction
a and c are points 10 mm from both edges of paper.
Dimension Measure with upper and lower
rollers fully heated
b
| a-c |
a. Generating Output for Nip Width Measurement
Wait for 15 min after the print ends its warm-up period; make 20 A4
prints, and measure the nip.
1) Place A3 paper in the manual feed tray.
2) Make the following selections in service mode to generate output:
COPIER> FUNCTION> FIXING> NIP-CHK.
The A3 paper will be picked up, and a print like the one shown in figure
will be delivered.
14.6.2 Adjusting the Lower Roller Pressure (nip)
iR105i/iR105+ / iR9070
The nip width must be as indicated in figure; if not, adjust it using the
pressure adjusting nut.
Feed
direction
a and c are points 10 mm from both edges of paper.
14-32
0008-9719
c
b
Middle
of paper
a
F-14-65
T-14-4
9.0 -/+ 0.5 mm
0.5 mm or less
0007-0658
c
b
Middle
of paper
a
F-14-66
Dimension Measure with upper and lower
rollers fully heated
b 200 V: 9.0 -/+ 0.5 mm, 208/230 V:
10.0 -/+ 0.5 mm
| a-c | 0.5 mm or less
a. Generating Output for Nip Width Measurement
Wait for 15 min after the copier ends its warm-up period; make 20 A4
copies, and measure the nip.
1) Place A3 copy paper in the manual feed tray.
2) Make the following selections in service mode to generate output:
COPIER> FUNCTION> FIXING> NIP-CHK.
The A3 paper will be picked up, and a copy like the one shown in figure
will be delivered.
T-14-5