FrameMaker Ver.5.5E(PC) EP3000/EP3010 GENERAL, MECHANICAL/ELECTRICAL
98.06.10
M-30
The Scanner starts the scan motion when a Scan signal is output from the Master Board.
At the start of a scan motion and other heavy load conditions, the Scanner Motor requires a
large amount of current. The Current 1 or 2 signal from the Motor Drive Board is selected
accordingly to vary the amount of current supplied to the Scanner Motor.
✽
The Current signal selection timing is controlled by software.
On receiving the Scan signal, the Motor Drive Board applies motor drive pulses, which are
out of phase with each other, to the Scanner Motor. The motor speed is varied by changing
the width of the pulses applied to the Scanner Motor.
Current 1
H
H
L
Current 2
H
L
H
Operation
When the scan
speed reaches a
given level.
At scan start and dur-
ing scan decelera-
tion.
At return start and
during return motion.
Control Signal
Energized
Deenergized
WIRING DIAGRAM
M4
Scan Signal
PWB-F
L
H
8-D
M4
Current
Switching
Signal 1
PWB-F
L
H
M4
Current
Switching
Signal 2
PWB-F
L
H
Control Signal
Blocked
Unblocked
WIRING DIAGRAM
PC81
PWB-A PJ39A-1
L
H
7-B