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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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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LK-T21 Technical Manual
1.8 Internal Buffer
1) Receive buffer: 4kbyte
1.9 Electrical Characteristics
1) Supply voltage: +24 VDC ± 7%
2) Current consumption (at 24V):
Operating:Approx.1.5A(atASCIIPrinting)
Peak:Approx. 10A(at print duty 100%, For 10 seconds or less)
Stand-by: Approx. 0.15A
1.10 EMI and Safety Standards Applied
1) Europe: EMI – EN55022 CLASS A
EMS – EN61000-3-2, EN61000-3-3, EN50082-1
Safety Standard: EN60950
2) North America: EMI - FCC Part#15 Class A
Safety Standards- UL(1950), c-UL(No.950)
1.11 Reliability
1) MCBF: 50 million lines
(based on an average printing rate of 12.5% with paper thickness in the range 65 ㎛
to 75 ㎛).
35 million lines
(based on an average printing rate of 12.5% with paper thickness in the range 76 ㎛
to 150 ㎛)
2) Cutter Life: the cutter performs 1,000,000 cuts with thickness 65 ㎛, and/or 300,00cuts with
thickness 100 ㎛to the paper
1.12 Environmental Conditions
1) Temperature: Operating: 5°to 45°C
Storage: -20°to 60°C
(except for paper)
2) Humidity: Operating: 10 to 90%RH
Storage: 10 to 90%RH (except for paper)
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LK-T21 Technical Manual
2. Configuration
2.1 Interface
2.1.1 RS-232 serial interface
2.1.2 Specifications
Data transmission: Serial
Synchronization: Asynchronous
Handshaking: DTR/DSR or XON/XOFF control
Signal levels: MARK= -3 to –15V: Logic “1”
SPACE= +3 to +15V: Logic “0”
Baud rage: 4800, 9600, 19200, 38400 bps
Data word length: 7 or 8 bits
Parity Settings: None, even, odd
Stop bits: 1 or more
Connector (printer side): Female DSUB-25 pin connector
NOTE: The data word length, baud rate, and parity depend on the
DIP switch settings.
2.1.3 Switching between on-line and off-line
The printer does not have an on-line/off-line switch.
The printer goes off-line:
•Between when the power is turned on (including reset using the interface) and when the
printer is ready to receive data.
•During the self-test.
•When the cover is open.
•During paper feeding using the paper feed button.
•When the printer stops printing due to a paper-end (in cases when an empty paper supply
is detected by either paper roll end detector or the paper roll near-end detector with a
printing halt feature by
ESC c4).
•During macro executing stand by status.
•When a temporary abnormality occurs in the power supply voltage.
•When an error has occurred.
2.1.4 Interface connector terminal assignments and signal functions
PIN SIGNAL I/O DESCRIPTION
2 TXD - Printer transmit data line RS-232C level
3 RXD - Printer receive data line RS-232C level
4, 20 DTR Output Printer handshake to host line RS-232C level
6 DSR Input Data Send Ready
1,7 GND - System Ground
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LK-T21 Technical Manual
2.1.5 Serial interface connection example
Host side Printer side
TXD ………………………………… RXD
DSR ………………………………… DTR
RXD ………………………………… TXD
DTR ………………………………… DSR
FG ………………………………… FG
SG ………………………………… SG
DETAILS: ◦Set the handshaking so that the transmit data can be received.
◦Transmit data to the printer after turning on the power and initializing the printer.
B0 B1 B2 B3 B4 B5 B6 B7START PARITY
"1"
"0"
STOP
1 or 2
Bit
N
one or
1 Bi
t
7 or 8
Bi
t
1Bit
< Figure 2.1 Serial transmission bit frame >
RxD
DTR
ready busy ready busy
buffer full buffer emptied
"1"
"0"
"0"
"1"
< Figure 2.2 Line transmission with protocol >
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LK-T21 Technical Manual
2.1.6 Centronics parallel interface
1) Specifications
Data transmission: 8-bit parallel
Synchronization: STROBE pulse supplied by host computer.
Handshaking: ACK and BUSY
Connector: D-SUB 36(female) or equivalent
DATA Datan Datan+1
tHold
nStrobe
tSetup tSTB
Busy Peripheral Busy
tReady tBUSY
nAck
tReply tACK tnBUSY
tNext
PIN SIGNAL I/O DESCRIPTION
1 STROBE- Input Synchronize signal Data received
2-9 DATA0-7 Input Data bit Transmitted 0-7
10 ACK- Output Data receiving competed
11 BUSY Output Impossible to printer data receiving
12 PE Output Paper empty
13 SELECT Output Printer’s status for ON/OFF line
14 AUTO FEED- Input ND
15 GROUND - System Ground
16 GROUND - System Ground
17 NC -
18 LOGIC-H - +5V
19-30 GROUND - System Ground
31 INIT- Input Initialize
32 ERROR- Output Printer Error
33 GROUND - System Ground
34 NC -
35 +5V - +5V
36 SELECT IN- Input ND
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LK-T21 Technical Manual
2.1.7 Data Receiving Timing (Compatibility Mode)
Specifications
Characteristics Symbol Min [ns] Max [ns]
Data Hold Time (host) tHold 750 --
Data Setup Time tSetup 750 --
STROBE Pulse Width tSTB 750 --
READY Cycle Idle Time tReady 0 --
BUSY Output Delay Time tBUSY 0 500
Data Processing Time tReply 0 ∝
ACKNLG Pulse Width tACK 500 10us
BUSY Release Time tnBUSY 0 ∝
ACK Cycle Idle Time tNEXT 0 --
•The printer latches data at a nStrobe ↓timing
2.1.8 USB Interface
PIN SIGNAL I/O DESCRIPTION
1 +5V - +5V
2 DATA- - Printer transmit data line
3 DATA+ - Printer transmit data line
4 GND - System Ground
1) Specifications
Data transmission: USB 2.0
Connector: USB “B” type connector
2) USB interface connection example
Host side Printer side
VCC ………………………………… VCC
DATA+ ……………………………… DATA+
DATA- ……………………………… DATA-
GND ………………………………… GND
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LK-T21 Technical Manual
2.1.9 Interface Connector
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LK-T21 Technical Manual
3. Connectors
3.1 Interface Connectors
Refer to Section 2.1, Interface
3.2 Electrical Characteristics
1) Input Voltage: DC 24V ± 10%
2) Current Consumption: Operating: Approx. 1.5 A (at ASC printing)∥
Peak: Approx. 10 A (at print duty 100%, For 10 seconds or less)
Stand-by: Approx. 0.15 A
3) Power Connector
3.3 Drawer Kick-out Connector (Modular Connector)
The pulse specified by ESC p or DLE DC4 is output to this connector.
The host can confirm the status of the input signal by using the
DLE EOT,GS a, or GS r commands.
1) Pin assignments: Refer to Table 2.2.2
2) Connector model:
Printer side: DAEEUN DEK-623PCB-6-B or Equivalent
User side: 6-position 6-contact (RJ12telephone jack)
< Drawer Kick-out Connector Pin Assignments >
Pin Number Signal Name Direction
1 Frame GND -
2 Drawer kick-out drive signal 1 Output
3 Drawer open/close signal Input
4 +24V -
5 Drawer kick-out drive signal 2 Output
6 Signal GND -
+24V is output through pin 4 when the power is turned on. However, pin 4 must by used only for the drawer.
< Figure 3.1 Drawer Kick-out Connector >
3) Drawer kick-out drive signal
Output signal: Output voltage: Approximately 24V
Output current: 1A or less
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LK-T21 Technical Manual
CAUTION: To avoid an overcurrent, the resistance of the drawer kick-out solenoid
must be 24 Ωor more.
Output waveform: Outputs the waveforms in Figure 3.2 to the points A and B
in Figure 3.3
t1 (ON time) and t2 (OFF time) are specified by ESC p or
DLE DC4.
< Figure 3.2 Drawer Kick-out Drive Signal Output Waveform >
4) Drawer open/close signal
Input signal level (connector pin 3):“L”= 0 to 0.8V
“H”=3to5V
< Figure 3.3 Drawer Circuitry >
NOTE: 1. Use a shielded cable for the drawer connector cable.
2. Two driver transistors cannot be energized simultaneously.
3. The drawer drive duty must by as shown below.
ON time
≤0.2
(ON time + OFF time)
4. Be sure to use the printer power supply (connector pin 4) for the drawer power source.
5. The resistance of the drawer kick-out solenoid must not be less than the specified. Otherwise, an
overcurrent could damage the solenoid.
6. Do not connect telecommunication network to the drawer kick-out connector.
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LK-T21 Technical Manual
4Controle Command summary
No. Command Function
1 HT Horizontal tab
2 LF Print and line feed
3 CR Print and carriage return
4 FF Print end position label to start printing
5 CAN Cancel print data in page mode
6 DLE EOT Real-time status transmission
7 DLE ENQ Real-time request to printer
8 DLE DC4 Generate pulse at real-time
9 ESC FF Print data in page mode
10 ESC SP Set character right-side spacing
11 ESC ! Set print mode
12 ESC $ Set absolute print position
13 ESC % Select/cancel user-defined character set
14 ESC & Define user-defined characters
15 ESC * Set bit image mode
16 ESC - Turn underline mode on/off
17 ESC 2 Set 1/6 inch line spacing
18 ESC 3 Set line spacing using minimum units
19 ESC = Select peripheral device
20 ESC ? Cancel user-defined characters
21 ESC @ Initialize printer
22 ESC D Set horizontal tab positions
23 ESC E Select emphasized mode
24 ESC G Select double-strike mode
25 ESC J Print end feed paper using minimum units
26 ESC L Select page mode
27 ESC M Select character font
28 ESC R Select international character set
29 ESC S Select standard mode
30 ESC T Select print direction in page mode
31 ESC V Set/cancel 90°cw rotated character
32 ESC W Set printing area in page mode
33 ESC ＼Set relative position
34 ESC a Align position
35 ESC c 3 Select paper sensor(s) to output paper-end signals
36 ESC c 4 Select paper sensor(s) to stop printing
37 ESC c 5 Enable/disable panel buttons
38 ESC d Print and feed paper n lines
39 ESC p General pulse
40 ESC t Select character code table
41 ESC { Set/cancel upside-down character printing
42 FS p Print NV bit image
43 FS q Define NV bit image
44 GS ! Select character size
45 GS $ Set absolute vertical print position in page mode
46 GS * Define downloaded bit image
47 GS / Print down-loaded bit image
48 GS : Start/end macro definition Not avalible
49 GS B Turn white/black reverse printing mode on/off
50 GS H Select printing position of HRI characters
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LK-T21 Technical Manual
51 GS I Transmit printer ID
52 GS L Set left margin
53 GS P Set horizontal and vertical motion units
54 GS V Cut paper
55 GS W Set printing area width
56 GS ＼Set relative vertical print position in page mode
57 GS ^ Execute macro Not avalible
58 GS a Enable/disable Automatic Status Back(ASB)
59 GS b Turn smooting mode on/off Not avalible
60 GS f Select font for HRI characters
61 GS h Set bar code height
62 GS k Print bar code
63 GS r Transmit status
64 GS v 0 Print raster bit image
65 GS w Set bar code width
< Add >
1 ESC i Full cut
2 ESC m Partial cut
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