Fujitsu ULTIMA90 Maintenance Manual page 136

PAPER PATH
STATE OF ROLLER
1 Nip ROLLER F
2 Nip ROLLER R
3 What TR motor drives
4 What LF motor drives
Note * ; In each tractor mode, both of nip rollers are closed when loading and ejecting the paper.
< Opening and closing the Nip Roller>
HCPP motor moves OC lever L and R through the gear. And OC lever L and R move the OC slide cams. And OC
slide cams moved the OC calms. and OC came lift up the Nip roller.
When OC slide cam move to the front side, then front Nip Roller is opened. When
OC slide cam move to the rear side, then rear Nip Roller is opened.
< Switching the TR motor transmission>
HCPP motor rotates the OC lever L. And OC lever L's rib (cam) shifts shift gears F and R to switch power to the
TR motor.
< How to determine the home position of a HCPP mechanism>
When the PAPER PATH button is pressed to change the paper path, the OC lever operates to detect the ON/OFF
state of the HCPP switch under the OC lever L. OC lever L has a cam to operate the switch, which is closed in
REAR TRACTOR side and open in FRONT TRACTOR side.
Detecting the home position done from off state to on state.
OC cam
Timing belt
Gear which drives
rear tractor.
Idle gear
"TRACTOR F"
1
OPEN CLOSE
CLOSE CLOSE
FRONT TRACTOR
ROLLERS
LF Motor
2 step gear
Idle gear 3
Figure 5.11 HCPP mechanism
136
"CUT SHEET"
2 *
CLOSE
CLOSE
Nothing
ROLLERS
Platen gear
Shift gear R
Shift spring
"TRACTOR R"
2 * 1
CLOSE CLOSE
CLOSE OPEN
REAR TRACTOR
ROLLERS
Nip roller gear
front and rear
DV gear
front and rear
Slide cam
OC Lever
PL idle gear
Gear which drives
front tractor.
Shift gear F
HCPHP SW
TR Motor