4-3
Electrical
4.1.3 Control of Belt Motor
(a) The motor for discharging papers out of stack is a two phase exciting type, two
phase pulse motor. Its control circuit is shown below.
(b) Each pulse signal output from P20, P21, P22, P23 of IC1 in P.C.B (PWB-A)
excites and rotates the coil in each phase.
(c) Motor is stopped when signals from P20, P21, P22, P23 of IC1 change to L and
power supply to motor coil is cut off.
1
2
3
4
5
6
1
2
3
4
5
6
SM
SM
DC24V
B
PJ4 4
B
PJ4 5
A
PJ4 3
A
RA1
M3
18
11
8
1
10
14
3
9
OUTB
OUTA
OUTA
R5
R6
R7
R6
R9
C6
C7
R4
R3
R2
C5
C4
OUTB
RSB
REFB
REFA
RSA
PJ4 6
23
19
20
18
16
17
5
13
2
6
P20
P22
P21
P23
IC1
GND
INA
INA
INB
TdA
TdB
INB
DC5V
BELT MOTOR
4.1.4 Control of Elevation Motor
(a) Elevation motor, which moves lower tray up and down, is a +24V DC motor. Its
control circuit is shown below.
(b) It is controlled by the combination of signals from P30 and P31 of IC1 in P.C.B.
(PWB-A).
(c) Lower tray is elevated when H and L are output from P30 and P31 respectively.
Lower tray is descended when L and H are output from P30 and P31 respectively.
(d) Motor is stopped when L is output from P30 and P31, and braked when H is
output from P30 and P31.
ELEVATION MOTOR
1
2
1
2
SM
SM
C17
C15
IC16
C19
C18
PJ4
8
PJ4
7
RA3
IC3
M4
DC24V
DC5V
GND
GND2
3
5
1
2
6
5
47
OUT1
VCC
GND
OUT2
IN1
IN2
P30
P31