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11. Elevator motor drive circuit
The elevator motor control signal (EMA, B) from the expansion I/O is
input through the driver TD62503F (IC13) to the H driver STA457C
(IC12), to drive the elevator motor which adjusts the tray height ac-
cording to the paper volume stored in the off-set tray (tray 3). EMA,B
signal logic controls the rotational direction of the motor (CW/CCW) to
move up and down the tray.
input through the driver TD62503F (IC13) to the H driver STA457C
(IC12), to drive the elevator motor which adjusts the tray height ac-
cording to the paper volume stored in the off-set tray (tray 3). EMA,B
signal logic controls the rotational direction of the motor (CW/CCW) to
move up and down the tray.
The motor is braked to improve the stopping accuracy of the tray.
TD62503 (IC13, a driver for driving STA457C, consists of R180-
R183, R197, R198, C158, C159, C166, C167, D7, and D8 which
forms a delay circuit to prevent short electric current from flowing
inside the H driver when EMA and B are changed over.
R183, R197, R198, C158, C159, C166, C167, D7, and D8 which
forms a delay circuit to prevent short electric current from flowing
inside the H driver when EMA and B are changed over.
To protect the circuit from shorting and motor locking, a protective
fuse (F3) is installed.
fuse (F3) is installed.
EMB
EMA
Rotational
direction
Working direction
0
0
Brake
Brake
0
1
CW
Elevation
1
0
CCW
Descent
1
1
Stop
Stop
12. Off-set motor drive circuit
The off-set motor control signal (OFMA,B) from the CPU is input to
the H driver TA7291S (IC1), to drive the off-set motor which moves
the tray sidewise against the paper discharge direction, in order to
sort the sheets discahrged to the off-set tray (tray 3) by the number of
sheets specified.
the H driver TA7291S (IC1), to drive the off-set motor which moves
the tray sidewise against the paper discharge direction, in order to
sort the sheets discahrged to the off-set tray (tray 3) by the number of
sheets specified.
The rotational direction of the motor is crank controlled in one direc-
tion (CW) and braked to a stop at the off-set home position.
tion (CW) and braked to a stop at the off-set home position.
To protect the circuit from shorting and motor locking, a protective
fuse (F1) is installed.
fuse (F1) is installed.
OFMB
OFMA
Rotational
direction
Working direction
0
0
Stop
Stop
0
1
CCW
Not used
1
0
CW
Off-set operation
1
1
Brake
Brake
9
4
8
F03
1.15A/125V
T1.0A/250V
+24V
1
6
8
4
9
STA457C
IC12
6
1
3
3
2
7
7
5
5
10
10
EVM+
EVM-
EVM
D06 D05
1SR124-400x2
I/O
(IC03)
PE0
PE1
4 EMA
5 EMB
TD62503F
TD62503F
TD62503F
TD62503F
+5V
R183
R182
R181
R180
D07
D08
R178
R179
4.7K
4.7K
200
200
1K
1K
1SS133
1SS133
C158
1000P
C159
1000P
1
16
2
15
3
14
4
13
IC13D
IC13C
IC13B
IC13A
+5V
R198
R197
1K
1K
C166
68000P
C167
68000P
R20
R19
2.4K(1/4W)
2.4K(1/4W)
1K
2
Vcc
IN1
IN2
GND
VS
VREF
OUT1
OUT2
TA7291S
IC01
2
9
1
5
3
7
8
6
CPU
(IC02)
P44
P45
23 OFMA
24 OFMB
R101
R102
47K
47K
+5V
F01
0.315A/125V
T0.25A/250V
T0.25A/250V
C01
10U/35V
OFM+
OFM-
OFM
+24V
9 – 10
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