TSC TTP-243 Series - Stepping Motor and DC Motor Driver; Protection Circuit

25
TTP-243 Bar Code Printer
Service Manua
l
3.10 Stepping Motor And DC Motor Driver/ Protection Circuit
MB
1
T
2
VMM
3
GND
4
VCC
6
I1
7
PHASE
8
I0
9
C
10
VR
11
MA
15
E
16
GNDGNDGND
5,12,13,
VMM
,14
U17
PBL3717/2
MB
1
T
2
VMM
3
GND
4
VCC
6
I1
7
PHASE
8
I0
9
C
10
VR
11
MA
15
E
16
GNDGNDGND
5,12,13,
VMM
,14
U18
PBL3717/2
C55
820p
C56
820p
C57
820p
C58
820p
R51
56K
R45
1K
R52
56K
R46
1K
R14
1
R15
1
R16
1
R17
1
PHASE1
PHASE2
+5V
+5V
+24V
+24V
L18
BEAD
L20
BEAD
C52
470u
C54
470u
C27
0.1u
C28
0.1u
MB
1
T
2
VMM
3
GND
4
VCC
6
I1
7
PHASE
8
I0
9
C
10
VR
11
MA
15
E
16
GNDGNDGND
5,12,13,
VMM
,14
U19
PBL3717/2
C59
820p
C60
820p
R53
56K
R47
1K
R18
1
R19
1
+5V
+24V
L19 BEAD
C53
470u
C29
0.1u
PHASE3
DCMA
DCMB
MOTOR_GND
D12
D13
D14
D15
I1
I0
DCM
CUTTER
A
1
B
2
CLR
3
Q
4
Q
13
Cext
14
RCext
15
U13A
74HC123
C12
0.1u
R41
150K
+5V
MOTOR
1
2
3
4
5
6
RN6
10K 6PIN
蜂鳴器
1A1
2
1A2
4
1A3
6
1A4
8
2A1
11
2A2
13
2A3
15
2A4
17
1Y1
18
1Y2
16
1Y3
14
1Y4
12
2Y1
9
2Y2
7
2Y3
5
2Y4
3
1G
1
2G
19
U6
74LS244
1
2
3
4
JP12
STEP MOTOR
L31 BEAD
L30 BEAD
L29 BEAD
L28
BEAD
L27
BEAD
L7
BEAD
C78
0.01uF
C77
0.01uF
C73
0.01u
C74
0.01u
C76
0.01u
C75
0.01u
F2
FUSE2
F1
FUSE2
F3
FUSE2
CUTTER
Fig. 3.11 Stepping Motor And DC Motor Driver/ Protection Circuit
This is the Stepping Motor and DC motor Drive/ Protection Circuit. Connector JP12
sends the pattern as shown in table1. The status of I0 & I1 determines the stepping
motor power level, the power level pattern is shown in table2. Motor port is the
protection pin. When it is at ‘LOW’ level, the power of the motor system will be closed.
Power will be ON again until MOTOR pin is the pulse of ‘HIGH’ level. PHASE1 and
PHASE2 determine the pattern of stepping motor drive circuit. For example, the
sequence of PHASE1/PHASE2 in full step mode is 0/0 → 0/1 → 1/1 → 1/0.
Step
Pin on JP12
1 2 3 4 PHASE
1 ON ON ON A
2 ON ON /A
3 ON ON ON /B
4 ON ON B
Table1 Stepping Motor Pattern
MOTOR CURRENT I0 I1
HIGH LEVEL 100% L L
MEDIUM LEVEL 60% H L
LOW LEVEL 20% L H
ZERO CURRENT 0% H H
Table2 Stepping motor power pattern