Tray A/B Lifting Motor Control - Canon SADDLE FINISHER K3 Service Manual

CHAPTER 2 OPERATION OVERVIEW

6.1.6 Tray A/B lifting motor control

The diagram below illustrates how the tray A/B lifting motors (M12/M13) are driven.
The tray A/B lifting motors are 4-phase stepping motors. The finisher controller PCB con-
trols the output timing of the pulse signals A, B, A* and B*, to switch the motors ON/OFF
and to switch the direction of rotation. In motor hold, the STTRYMHLD level is switch to a
hold level.
The finisher control PCB monitors the status of the tray A/B idling sensors (PI19/ PI18)
when generating pulse signals. If the sensors switch ON/OFF at the prescribed timing dur-
ing pulse output, the motor rotation is judged normal. If the sensor output does not switch
ON/OFF properly, a motor malfunction or drive mechanism malfunction is judged, and an
error message is displayed on the copier control panel.
J113A/ J81/
J109A J89
1
2
3
4
5
6
N.C. N.C.
7
8
9
10
11
12
13
Finisher
controller
PCB
2-68
COPYRIGHT© 2001 CANON INC.
13
STTRYMAB * /STTRYMBB *
12
STTRYMAB/STTRYMBB
11
STTRYMAA * /STTRYMBA *
10
STTRYMAA/STTRYMBA
9
STTRYMHLD
8
36VTRYA/
7
36VTRY
6
5
4
3
2
1
Tray A/B lifting motor driver PCB
F02-601-07
2000 2000 2000 2000
+36V
J602
+5V
A
3
1
*
A
4
B
5
2
*
B
6
CANON SADDLE FINISHER K3/K4 REV.0 MAR. 2001
Tray A/B
Tray A/B
idling
lifting
sensors
motors
PI19/ PI18
M13/M12
Torque limiter
To elevator
rack