Minolta EP5000 General, Mechanical/Electrical page 43

Interleaf EP5000/EP4000 GENERAL, MECHANICAL/ELECTRICAL
97.04.01
The Scanner starts the scan motion as a Scan signal is output from PWB-A. At the start
of a scan motion and other heavy load conditions, Scanner Motor M2 requires a large
amount of current. The Current 1 or 2 signal from PWB-F is selected accordingly to vary
the amount of current supplied to M2.
*The Current signal selection timing is controlled by software.
Current 1
Current 2
Current
When the scan
speed reaches a
Operation
given level and dur-
ing scan deceleration
* M2 is used at scan start of a small zoom ratio.
On receiving the Scan signal, Motor Drive Board PWB-F applies motor drive pulses,
which are out-of-phase with each other, to M4. The motor speed is varied by changing
the width of the pulses applied to M2.
Control Signal
M2
PWB-F
Scan Signal
M2
Current
PWB-F
Switching
Signal 1
M2
Current
PWB-F
Switching
Signal 2
Control Signal
PC81 PWB-F
L M1
H L
H H
M2>M1>L
At scan start and dur-
ing return decelera-
tion. (*)
Energized Deenergized
L H
L H
L H
Blocked Unblocked
L H
M-29
M2
H
L
At return start and
during return motion.
(*)
WIRING DIAGRAM
22-B
WIRING DIAGRAM
18-E