Fig. 4-125 Driving Mechanism Operation (A); Fig. 4-126 Driving Mechanism Operation (B) - Canon NP-70 Service Manual

4-106
4.17 COPYBOARD DRIVING MECHANISM ASSEMBLY
4.17-1
OUTLINE OF ASSEMBLY OPERATION
NP
-70
This assembly is used to drive the copyboard so it moves back and forth for copying. The
operation occurs as follows:
a) As the drum starts rotating prior to the beginning of a copy cycle, it moves the drive
chain causing the return and forward drive sprockets to rotate. As neither clutch is
"ON", no further action occurs (see Fig. 4-125).
C.E1- "OFF"
C~ 2- "OFF"
Drive Chain
Drive Sprockets
Fig. 4-125 Driving Mechanism Operation (AJ
b) As the "start cam" begins the copy cycle, the forward clutch (C E? 1) is energized.
c) Activation of C.~ 1 results in the wire driving pulley rotating to cause the copyboard to
move forward (see Fig. 4-126).
C,~ 1-"ON"
ire Driving Pulley
Fig. 4-126 Driving Mechanism Operation
(BJ
Second Printingtilune, 1974
© CANON INC.