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OPERATIONS
and
TIMING
I
4.
Scanner Motor
Drive
System
Operation
a.
Clockwise
rotation
The
scanner motor
driver
outputs pulses,
and
the
motor
rotates
CW.
This
moves
the
lens
in
the
direction
for
REDUCTION,
and
the
scanner
moves
forward.
For
REDUCTION
copying, the
motor
speed
increases
to
move
the
scanner
faster
(forward).
b.
Counterclockwise
rotation
The
scanner motor
is
driven
CCW
by
pulses
of
phase
relationship
opposite
to that
used
to drive
it
CW.
This
moves
the lens
in
the direction
for
ENLARGEMENT,
and
moves
the
scanner
in
reverse.
DC
controller
PCB
36V
Motor
power
supply
J302-5
COMA
{jM^jj
Scanner motor
(M2)
Output
shaft
T
COMB
-jt_
J302-2
Figure 3-14
3-16
COPYRIGHT
©
1992
CANON
INC.
CANON
NP-1550
REM
JAN.1992
PRINTED
IN
JAPAN (IMPRIMEAUJAPON]
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