Lukhan LK-T21 User manual

LK-T21
Thermal Receipt Printer
Technical Manual
SEWOO TECH CO., LTD.
www.miniprinter.com

LK-T21 Technical Manual
TABLE OF CONTENTS
1. General Specifications
1.1 Printing Specifications
1.2 Character Specifications
1.3 Auto Cutter
1.4 Paper Roll Supply Device
1.5 Paper Specification
1.6 Printable Area
1.7 Printing and Cutting Positions
1.8 Internal Buffer
1.9 Electrical Characteristics
1.10 EMI and Safety Standards Applied
1.11 Reliability
1.12 Environmental Conditions
2. Configuration
2.1 Interface
2.1.1 RS-232 serial interface
2.1.2 Specifications
2.1.3 Switching between on-line and off-line
2.1.4 Interface connector terminal assignments and signal functions
2.1.5 Serial interface connection example
2.1.6 Centronics parallel interface
2.1.7 Data Receiving Timing(Compatibility Mode)
2.1.8 USB Interface
2.1.9 Interface Connector
3. Connectors
3.1 Interface Connectors
3.2 Electrical Characteristics
3.3 Drawer kick-out Connector (Modular Connector)
4. Control Command Summary
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LK-T21 Technical Manual
1. General Specifications
1.1 Printing Specifications
1) Printing method: Thermal line printing
2) Dot density: 180dpi x 180dpi
203dpi x 180dpi
3) Printing direction: Unidirectional with friction feed
4) Printing width: 72mm(2.83"), 576 dot positions (203dpi)
72.2mm(2.84"), 512 dot positions (180dpi)
80mm(3.15"), 640 dot positions (203dpi)
5) Characters per line(default): Font A: 42
Font B: 56
6) Printing speed: High speed mode:
35.5lines/second maximum
(1/6inch feed) (at 24V, 20 )℃
Approximately 200mm/sec maximum
(approximately 5.9inchs/sec maximum)
NOTE:☞Speeds are switched depending on the applied voltage to the printer and head temperature
conditions automatically.
NOTE:☞There may be variations in printing after switching the mode of the printing speed. To prevent this
for logo printing with ESC* command, using a downloaded bit image is recommended. Change
in printing speed does not occur during down loaded bit image printing.
7) Line spacing (default): 1/6 inch (4.23mm)
Programmable by control command.
1.2 Character Specifications
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LK-T21 Technical Manual
1) Number of characters: Alphanumeric characters: 95
Extended graphics 128 × 7 pages
(including one space page)
International characters: 32
① English
② Hangul
③ Chinese (GB2312,Big5)
④ Kanji
2) Character structure: Font A: 12 24ⅹ
Font B: 9 24ⅹ
Hangul, Chinese: 24 24ⅹ
Font A is selected as the default
3) Character size:
EPSON Emulation STAR Emulation
Dot density 0.141ⅹ0.141mm/dot
(180*180dpi)
0.125ⅹ0.141mm/dots
(203*180dpi)
[dpi: dots per 25.4mm{1"}]
3)Printing direction Unidirectional With friction feed
4)Paper width
82.5mm
(3.25")
80mm
(3.15")
60mm
(2.36")
58mm
(2.28")
82.5mm
(3.25")
80mm
(3.15")
60mm
(2.36")
58mm
(2.28")
5)Maximum
printable area
72.2mm
(512dots)
72.2mm
(512dots)
54.1mm
(384dots)
50.8mm
(360 dots)
80mm
(640dots)
72mm
(576 dots)
54.5mm
(436 dots)
52.5mm
(420 dots)
6)Character / line
Font A (12 24)ⅹ42 42 32 30 53 48 36 35
Font B (9 24)ⅹ56 56 42 40 71 64 48 46
Kanji Font (24 24)ⅹ21 21 16 15 26 24 18 17
1.3 Auto Cutter
Partial cut: Cutting with one point center uncut
NOTE: To prevent dot displacement, after cutting, paper must be fed
approximately 1mm(14/360 inches) or more before printing.
1.4 Paper Roll Supply Device
1) Supply method: Drop-in paper roll
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LK-T21 Technical Manual
2) Near-end sensor:
a) Detection method: Photo Reflector
b) Paper roll spool diameter:
Inside: 12mm(.47″)
Outside: 18mm(.71″)
c) Near-end adjustment: Adjusting screw
d) Remaining amount:
Fixed position #1 (approximately 23mm(0.9″))
#2 (approximately 27mm(1.06″))
NOTE: You can use a command to stop printing upon detection of a paper near-end.
1.5 Paper Specification
1) Paper type: Specified thermal paper
2) Form: Paper roll
3) Paper width:
(82.5mm paper width model)
82±0.5mm(3.23"±0.02")
(80mm paper width model)
79.5 ±0.5mm (3.13" ±0.02")
(60mm paper width model)
59.5±0.5mm(2.34"±0.02")
(58mm paper width model)
57.5 ±0.5mm (2.26" ±0.02")
4) Paper roll size: Roll diameter : Maximum 83mm
Take-up paper roll width:
80 ± 0.5, 1.0mm(3.15"±0.020", 0.04")
5) Paper roll spool diameter: Inside: 12mm(.47")
Outside: 18mm(.71")
NOTE: Paper must not be pasted to the paper roll spool.
1.6 Printable Area
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LK-T21 Technical Manual
<EPSON Emulation>
6.8mm
0.141mm
<82.5mm {3.25"} paper width model>
82±0.5mm
3mm
512 dots
72.2mm(dot #1-#512)
4.3mm
<80 mm {3.15"} paper width model>
0.141mm
79.5±0.5mm
3mm
512 dots
72.2mm(dot #1-#512)
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59.5±0.5mm
<60mm {2.36"} paper width model>
0.141mm
3mm 2.4mm
384 dots
54.1mm(dot #1-#384)
LK-T21 Technical Manual
57.5±0.5mm
0.141mm
3mm 3.7mm
360 dots
<58mm {2.28"} paper width model>
50.8mm(dot #1-#360)
Figure 1.6.1 Printable Area for EPSON Emulation
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LK-T21 Technical Manual
<STAR Emulation default setting>
57.5±0.5mm
<58mm {2.28"} paper width model>
0.125mm
2.65mm
420 dots
2.35mm
52.5mm(dot #1-#420)
Figure 1.6.2 Printable Area for STAR Emulation (for Default Setting)
<STAR Emulation when the paper width is changed>
82±0.5mm
<82.5 mm {3.25"} paper width model>
0.141mm
1mm 1mm
640 dots
80mm(dot #1-#640)
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LK-T21 Technical Manual
Figure 1.6.3 Printable Area for STAR Emulation (When the Paper Width Is Changed)
NOTE : The numeric values used here are center values to be used in designing. The printable area may be out of
alignment by 2 mm maximum to the left or right, due to the paper position or tolerance of parts.
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LK-T21 Technical Manual
1.7 Printing and Cutting Positions
Center of the print dotline
Auto-cutter blade position
Manual-cutter position
[Units: mm(Al the numeric values are typical.)]
Appro *12.6
Paper feed direction
Appro * 30.5
Figure 1.7.1 Printing and Cutting Positions
NOTE: Numeric values used here are center values to be used in designing. The values may vary slightly as a result of
paper slack or variations in the paper. Take this into account when setting the cutting position of the autocutter.
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