Ribbon Motor Driver - Citizen CL-E700 series Technical Manual

Forcible stop of the "SA PF Motor" at an abnormally high temperature:
If the temperature of the "SA PF Motor" reaches 105°C (221°F), the "SA PF Motor" stops.
In addition, an abnormally high temperature is monitored by the abnormally high temperature
detection circuit. (Refer to
temperature is detected with this circuit, the FPGA changes the level at pin N3 from "High" to
"Low" so that +24V DC (VMT) to the motor driver (U13) stops.

(2) Ribbon motor driver

This is a driving circuit to drive the "SA Ribbon Motor F" (stepping motor). The "SA Ribbon
Motor F" is used to take up the ribbon.
In the same way as mentioned in
Ribbon Motor F" is controlled by the VMTON signal at pin N3 of FPGA (U5). When the VMTON
signal is "High", Q20 turns ON, FET Q18 turns ON, and +24V DC (VMT) is supplied to the "SA
Ribbon Motor F".
The rotational direction is determined by the RIBDIR_R signal at pin B11 of FPGA and the
motor drive pulse is fed from pin A7 (RIBSTEP_R). The motor driver (U601) drives the "SA
Ribbon Motor F" using these signals.
The digital-to-analog converter (U16) controls the drive current to the "SA Ribbon Motor F".
The output from pin 6 (DARBMT_R) of U16 is fed to pin 15 (REF) of the motor driver (U601) to
determine the amount of drive current to the "SA Ribbon Motor F".
L: Turns on Q18 to supply
power to the ribbon motor.
U5
FPGA
N3
VMTON
21_N1
R138
A7 RIBSTEP_R
81_A7
B11
RIBDIR_R
72_B11
Motor current control
U16
D/A Converter
B5
13
82_B5
CLK
B4
12
82_B4 DI
D4
11
14_D4 LD
R2A20164SA
U1A
CPU
41
RIBTRG
P6_11
64
nRSTGA
P8_12
From the following Temperature Sensors
- Head Temperature Sensor
- PF Motor Temperature Sensor
- Ribbon Motor Temperature Sensor
"2-2-4(4) PF motor temperature
"2-2-5(1) PF motor
+24V
R136
C152
Q18
R137
TJ15S06M3L
Q20
(+24V)
VMT
DTC114EM
RIBBON_STOP_REWIND
RIBBON_DIR_REWIND
DARBMT_R
R119
AO1
AO2
U17A
6
3
AO3
+
1
2
R121
-
U6B RIBBON MT_ENABLE
Monostable
Multivibrator
9
5
1
/A
Q
10 2
B
11
CLR
74VHC123
nTMPERR
Normally "High".
[SA Main PCB]
L: Error
sensor".) If an abnormally high
driver", the power supply to the "SA
J301
J4 J304
F1
VMT
1 1
VMT
2 2
R71
RIBSTEP_R
16 16
RIBDIR_R
17
17
DARBMT_R
18
18
4 4
19 19 MOTENB
3-6
3-6 14-16
R167
C142
[SA Relay PCB]
U11
4
2-33
Chapter 2 Operating Principles
2-2.
Operation of Control Parts
U601
J601
Motor Driver
J602
VMT
3 3
19
21
VCC1 OUT1A
4 4 24
18
VCC2
OUT1B
5 5
14
CLK
22
6
6 17
OUT2A
DIR
1
7
7
OUT2B
4 4
8 8
2
ENABLE
8
MODE0
14-
9
MODE1
16
15
REF
C613
A4984SES
[SA Ribbon Control PCB]
CL-E700 series
Ribbon Motor
3
4
M
2
1
[SA Ribbon
Motor F]