Interleaf EP5000/EP4000 GENERAL, MECHANICAL/ELECTRICAL
97.04.01
M-29
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.
L
M1
M2
Current 1
H
L
H
Current 2
H
H
L
Current
M2>M1>L
Operation
When the scan
speed reaches a
given level and dur-
ing scan deceleration
At scan start and dur-
ing return decelera-
tion. (*)
At return start and
during return motion.
(*)
* 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
Energized
Deenergized
WIRING DIAGRAM
M2
Scan Signal
PWB-F
L
H
M2
Current
Switching
Signal 1
PWB-F
L
H
22-B
M2
Current
Switching
Signal 2
PWB-F
L
H
Control Signal
Blocked
Unblocked
WIRING DIAGRAM
PC81
PWB-F
L
H
18-E