COPYRIGHT© 2001 CANON INC.
2000 2000 2000 2000
CANON SADDLE FINISHER K3/K4 REV.0 MAR. 2001
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CHAPTER 2 OPERATION OVERVIEW
13.4.3 Feed speed control
The feed speed in folding mode is controlled by the folder motor (M71) and finisher inlet
motor (M1). The feed speed is the process speed only, and paper is fed at the same speed as
the process speed of the copier (speed control range: 314 to 607 mm/sec).
The feed speed in non-folding mode is controlled by the finisher inlet motor (M1).
13.4.4 Folder Motor Control
The folder motor (M71) is a DC brush-less motor. The CPU (IC101) on the finisher con-
troller PCB sends a reference pulse (FFMFG) to the folder motor controller PCB. The motor
drive signal (FFMON) is sent to the folder driver PCB by serial communication.
When the folder motor (M71) rotates, the clock pulse (FFMCLK) is sent to the speed con-
trol circuit by the encoder. The speed control circuit compares the reference pulse (FFMG)
and the clock pulse from the encoder, and adjusts the drive circuits so that they match. The
clock pulse signal (FFMCLK) is also sent to the finisher controller PCB and is synchronized
with the finisher inlet motor (M1). The CPU (IC101) monitors the clock pulse signal, and if
the number of pulses per second does not reach the specified value, it judges that there is a
fault in the folder motor. The motor is then stopped and error code E518 is displayed on the
control panel of the copier.
F02-1304-04
+24v
+5v
J799
-1
-3
-4
-6
-5
-2
Folder motor controller PCB
Folder motor
M71
Clock pulse
generator
Finisher
controller
PCB
Folder
driver PCB
Drive
circuit
Speed
control
circuit
IC101
FFMCLK
FFMFG
IC791
FFMON
FFMCLK
J125B
6 9
J125A
-5
-4