Chapter 2 Operating Principles
2-2.
Operation of Control Parts
2-23
CL-E720DT
2-2-5. Drivers
(1)
PF motor driver
This is a driving circuit to drive the “SA PF Motor” (stepping motor).
The following illustration shows a simplified circuit.
The “SA PF Motor” is driven by the bipolar constant current chopper method. The excitation
mode for the motor is the 1-2 phase.
The power supply to the “SA PF Motor” 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 PF Motor”.
The excitation mode of the “SA PF Motor” is determined by the PFMS1 and PFMS2 signals at
pins F2 and F3 of the FPGA. The rotational direction is determined by the PFDIR signal and
the motor drive pulse is fed from pin A4 (PFCLK signal). The motor driver (U13) drives the “SA
PF Motor” using these signals.
The digital-to-analog converter (U16) controls the drive current to the “SA PF Motor”. Its output
signal (DAPFMT) is fed to pin 15 (REF) of the motor driver (U13) to determine the amount of
drive current to the “SA PF Motor”.
In power saving mode, the VMTON signal goes to “Low” and VMT to the motor driver (U13)
stops
.
At this time, the PFOFF signal at pin A6 of FPGA goes to “High”, Q6 turns ON, and the
DAPFMT signal output from the digital-to-analog converter (U16) is fixed to a certain low
voltage level.
24
14
19
2
17
12
VCC1
VCC2
CLK
DIR
ENABLE
SLEEP
Motor Driver
1
2
3
4
J5
OUT1A
OUT1B
OUT2A
OUT2B
M
18
21
1
22
Q20
DTC114EM
Q18
TJ15S06M3L
REF
C116
R83
2
DAPFMT
L: Turns on Q18 to supply
Motor current control
PFCLK
PFDIR
nPFENB
nPFSLEEP
15
power to the PF motor.
D/A Converter
LD
CLK
13
12
DI
11
DACDAT
DACCD
DACSCK
R2A20164SA
AO2
AO1
8
R138
VMTON
N3
21_N1
FPGA
U5
DTC114TM
U16
PFOFF
+3.3V
R165
Q6
MODE0
MODE1
PFMS1
PFMS2
U13
A4
81_A4
D1
11_D1
F1
11_F1
A12
71_A12
F2
12_F2
F3
13_F3
B5
82_B5
B4
82_B4
D4
14_D4
A6
81_A6
[SA Main PCB]
9
(+24V)
A4984SES
+24V
R136
R137
VMT
[SA PF Motor]
C152
PF Motor
Summary of Contents for CL-E720DT
Page 1: ...Technical Manual CL E720DT Direct Thermal Barcode Label Printer ...
Page 5: ...Chapter 1 Specifications 1 1 CL E720DT CHAPTER 1 SPECIFICATIONS ...
Page 15: ...Chapter 2 Operating Principles 2 1 CL E720DT CHAPTER 2 OPERATING PRINCIPLES ...
Page 75: ...Chapter 3 Disassembly and Maintenance 3 1 CL E720DT CHAPTER 3 DISASSEMBLY AND MAINTENANCE ...
Page 119: ...Chapter 4 Troubleshooting 4 1 CL E720DT CHAPTER 4 TROUBLESHOOTING ...
Page 131: ...Chapter 5 Parts Lists 5 1 CL E720DT CHAPTER 5 PARTS LISTS ...
Page 159: ...Chapter 5 Parts Lists 5 29 CL E720DT DRAWING NO 7 Unit Opepane Rev 0 ...
Page 162: ...Chapter 5 Parts Lists CL E720DT 5 32 DRAWING NO 8 Accessories Rev 0 3 2 1 1 1 2 1 3 ...
Page 164: ...Chapter 6 Circuit Diagrams 6 1 CL E720DT CHAPTER 6 CIRCUIT DIAGRAMS ...
Page 183: ...Appendices AP 1 CL E720DT APPENDICES ...
Page 186: ...Appendices A Mounting Diagrams CL E720DT AP 4 2 Solder side ...