Download Thermal printing mechanism MT2460 User's Manual

Thermal printing mechanism
MT2460
User’s Manual
www.custom.it
MT2460
All rights reserved. Total or even partial reproduction of this manual in any
form, whether on paper or electronically, is strictly forbidden. While CUSTOM
ENGINEERING SPA guarantees that the information contained in this manual
has been carefully checked and verified, CUSTOM ENGINEERING SPA and
other resources utilized in its creation assume no responsibility for situations
arising from its use.
Feedback regarding any errors in the manual’s content or suggestions on
how it could be improved would be greatly appreciated. Since its products
are subject to continuous checking and improvement, CUSTOM
ENGINEERING SPA reserves the right to modify the information contained
in this manual without prior notice.
COD. DOME - MT2460
VERS. 1.00
Copyright  2002 CUSTOM ENGINEERING SPA – Italy
CUSTOM ENGINEERING SPA
Str. Berettine 2 - 43010 Fontevivo (PARMA) - Italy
Tel. : +39 0521-680111
Fax : +39 0521-610701
http: www.custom.it
To contact our Technical Support :
Phone. : +39 0521-680163 Fax : +39 0521-680146
Email : [email protected]
MT2460
Printing mechanism models MT2460
A. Front exterior view MT2460
1- Motor
2- Print Head
3- Head up lever
4- Sensor Head up detection
5- Knob paper feed
6- Thermal head connector
A- Paper outfeed
B- Paper input
C- Paper end sensor
5
2
1
A
C
MT2460
TABLE OF CONTENTS
INTRODUCTION
CONVENTIONS USED IN THE MANUAL ..................................................... 1
GENERAL SPECIFICATIONS ...................................................................... 2
DESCRIPTION OF THE MECHANISM ......................................................... 3
MAIN FEATURES ........................................................................................... 4
1. CONNECTIONS
1.1 CONNECTIONS TERMINALS .............................................................
1.2 THERMAL HEAD CONNECTOR .........................................................
1.2.1 Thermal head connector’s pin assignment ................................
1.3 MOTOR CONNECTOR ........................................................................
1.3.1 Motor connector’s pin assignment .............................................
1.3.2 Electrical circuit block diagram of motor ....................................
1.4 PAPER END/HEAD-UP CONNECTOR ...............................................
1.4.1 Paper end/Head-up sensor connector’s pin assignment ..........
1.4.2 Electrical circuit block diagram of paper end/head-up sensor ...
1-1
1-2
1-2
1-3
1-3
1-3
1-4
1-4
1-4
2. PRINT HEAD
2.1 PRINT HEAD ........................................................................................
2.2 OPERATION PRECAUTIONS .............................................................
2.3 BLOCK DIAGRAM OF ELECTRICAL SERIES CIRCUIT ..................
2.3.1 Head division processing ...............................................................
2.4 PRINTING DATA AND PRINTING POSITION ....................................
2.5 ELECTRICAL CHARACTERISTICS OF CIRCUIT ............................
2.6 SWITCHING CHARACTERISTICS OF CIRCUIT ..............................
2.7 TIMING CHART....................................................................................
2.8 THERMISTOR ......................................................................................
2.8.1 Thermistor curve ............................................................................
i
MT2460
2-1
2-1
2-2
2-2
2-3
2-4
2-5
2-6
2-6
2-8
TABLE OF CONTENTS
3. STEPPER MOTOR
3.1 STEPPER MOTOR ..............................................................................
3.1.1 Technical specifications .................................................................
3.1.2 Excitation sequence .......................................................................
3.2 PRECAUTION ......................................................................................
3-1
3-1
3-2
3-2
4. SENSOR
4.1 SENSOR............................................................................................... 4-1
4.2 GRAPHICS OF TYPICAL CHARACTERISTICS ................................ 4-2
5. DIMENSIONS
5.1 DIMENSIONS ....................................................................................... 5-1
MT2460
ii
INTRODUCTION
CONVENTIONS USED IN THE MANUAL
N.B.
Gives important information or suggestions relative to the use of the
printer
WARNING
The information marked with this symbol must be carefully heeded
to safeguard against damaging the printer
DANGER
The information marked with this symbol must be carefully heeded
to safeguard against injury to the operator.
1
MT2460
INTRODUCTION
GENERAL SPECIFICATIONS
(Tab. 1)
Item
Specification
Printing method
Thermal line dot method
Effective printing width
56mm ± 0,2mm
Head configuration (dots/line)
448
Dot Pitch
0.125 mm horizontal 0.125 mm vertical
Printing Speed (see power
consumption and energy for dots)
150 mm/s
Paper width (mm)
60 ± 0,5
Paper feed method
Friction feed, 1 dot line/1 pulses,
bipolar 2-2 phase excitation
Head temperature sensor
Thermistor
Paper detection
Reflective type photosensor
Maximum number of dots
activated at a time
192
700 Ω ± 3%
Dot resistance (Rav)
Number of strobes
3
5°C
Header energy
25°C
40°C
0,165mJ/dot (0,22 ms)
0,15mJ/dot (0,20 ms)
0,14mJ/dot (0,19 ms)
23 Ω
Driver saturated resistance (Ric)
External dimensions
(W x D x H)
85,4 x 49 x 20
Weight
72 gr.
Operation Voltage range logic
5V ± 10%
Operation Voltage dotline head
22,8 ÷ 25,2 V
Current consumption
31 mA/dots
Life/Reability
Recommanded paper
MT2460
50 K m
Kanzan KF50 or equivalent
2
INTRODUCTION
Maximum ratings
Parameter
(Tab. 2)
Specification
Head voltage
25,2 V (note between connectors)
Logic voltage
Vdd = +5V ± 0,25V
Environment operating
temperature range
0 ÷ 50°C
10 ÷ 90% RH no condensation
Operating humidity
Storage environmental
Maximum operating temperature
-40 ÷ 80°C Humidity 10 ÷ 90% no condensation, Paper excluded
Detected temperature of thermistor shall not exceed 65°C
DESCRIPTION OF THE MECHANISM
With the MT2460 mechanim Custom shows a new line of thermal plastic
printing mechanisms; the new serie offers the possibility to achieve the high
performances together with a very compact layout.
The MT2460 mechanisms prints at a high 203 dpi resolution on paper
weights between 60 and 120 gr/m2 (also labels).
The mechanism is featured with a high torque paper-pulling motor, and with a
silicon rubber roll.
3
MT2460
INTRODUCTION
MAIN FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
Paper width from 60 mm.
Autoloading capability.
High printing speed up to 65 mm/sec.
Logic voltage 24V.
Possibility to manage paper thickness from 60 to 120 gr/m2 (also
labels).
Sensors: Paper end sensor, head up detection, temperature sensor
thermistor 30K.
Life 50 Km Printed paper.
Compact Layout.
Double paper inlet : straight and 90°.
Possibility to have the kit of integrated autocutter.
New generation of printing head with a high performance.
Options : Control board, notch sensor.
MT2460
4
1. CONNECTIONS
Paper control
connector
(Fig.1.1)
6
1 4
1
1
M otor
connector
Therm al head
connector
15
1.1 CONNECTIONS TERMINALS
The MT2460 mechanism has 3 interface connectors (see fig. 1.1), thermal
head connector, motor connector and paper control connector. In the table
below aredescribed the connector specifications and functions :
(Tab.1.1)
N o.
Connector
Pin No.
Type
1
Thermal head connector
15
JST connector (or equivalent)
Male S15B-PH-K-S
6
Molex connector (or equivalent)
female housing 51021-0600
terminal 50058-800
4
Molex connector
female housing 51021-0400(white)
terminal 50058-8000
Head-up sensor
2
Paper end sensor
3
Motor connector
1-1
MT2460
1. CONNECTIONS
1.2 THERMAL HEAD CONNECTOR
1.2.1 Thermal Head connector’s pin assignments
(Tab.1.2)
N o.
Signal
Function
1
VH
HEAD POWER SUPPLY
2
VH
HEAD POWER SUPPLY
3
VH
HEAD POWER SUPPLY
4
GND
GROUND
5
GND
GROUND
6
GND
GROUND
7
VD D
LOGIC POWER SUPPLY
8
TM
THERMISTOR
9
STB1
STROBE1 SIGNAL
10
10
STB2
STROBE2 SIGNAL
11
11
STB3
STROBE3 SIGNAL
12
12
N.C.
NOT CONNECTED
13
13
CLOCK
SERIAL CLOCK
14
14
LATCH
LATCH
15
15
DATA IN
DATA INPUT
MT2460
1-2
1. CONNECTIONS
1.3 MOTOR CONNECTOR
1.3.1 Motor connector’s pin assignments
(Tab.1.3)
N o.
Signal
Remarks
1
MOTA+
Phase 1 coil
2
MOTB+
Phase 2 coil
3
MOTA-
Phase 1 coil
4
MOTB-
Phase 2 coil
1.3.2 Electrical circuit block diagram of motor
(Fig.1.3)
1
M O TA+
3
M O TA-
2
M O TB+
M otor
4
M O TB-
1-3
MT2460
1. CONNECTIONS
1.4 PAPER END/HEAD-UP SENSOR CONNECTOR
1.4.1 Paper end/Head-up sensor connector’s pin assignments
(Tab.1.4)
N o.
Signal
1
Photo-transistor collector
2
Photo-transistor emitter
Remarks
Paper-end sensor
3
Led anode
4
Led cathode
5
Head-up sensor output
6
Head-up sensor output
Head-up sensor
1.4.2 Electrical circuit block diagram of Paper end/Head-up
sensor
(Fig.1.4)
A
3
K
C
4
1
E
2
SW 1
5
SW 2
6
MT2460
1-4
2. PRINT HEAD
2.1 PRINT HEAD
MT2460 has a thickfilm thermal printhead. Scanning Line Time (SLT) is the
time to print one complete line using all strobes available.
The relation between the printhead supply voltage and “On Time” (Ton) is as
follows:
(Tab.2.1)
2
VHead x Rav
Po = Io2 x Rav =
(Rav + Ric)2
Symbol
Parameter
Unit
Rav
Average resistance
700 Ω
Ric
Driver Saturated Resistance
23 Ω
Eo
Ton =
Po
2.2 OPERATION PRECAUTIONS
1. When continuous printing is performed the supply energy should be
reduced so that the substrate temperature show in Maximum Condition
Table
2. Power On and Off sequence must be in the following order to prevent the
dot element damage: Turn On= Apply the logic supply voltage (Vdd) first
and then the printhead supply voltage. Turn Off= Switch off the printhead
supply voltage first and then turn the logic voltage off.
3. The printhead shall be disabled in STB during Power ON/OFF, or Power
(VH)-Logic(Vdd) sequence described in note 2 shall be kept.
4. Heat elements and IC’s shall be anti-electrostatic in order to prevent the
electrostatic destruction. Do not touch the connector pins with naked
hands.
5. The printhead substrate surface is coated with glass and mechanical
stress or shock (including dust scratch damage) should be avoided to
prevent damage.
6. When the printhead operation is finished, printsupply voltage (including
the charged voltage with capacitor) should be reduced to the ground level
and remained until next printhead operation occur.
7. Condensation should be avoided. If condensation occurred, do not switch
on the printhead power until condensation disappear.
8. If printing sound, for example sticking sound, occured, please adjust the
paper feed speed or pulse to avoid these kind of mechanical resonance.
9. Please pay attention that the paper used does not include bad factor to
affect printhead life.
10. The print density variation may become larger if the number of dots
energized at same time becomes greater than the 192 value.
2-1
MT2460
2. PRINT HEAD
2.3 BLOCK DIAGRAM OF THE ELECTRICAL CIRCUIT
1, 2, 3
V H (+24V )
448
321
320
129
128
1
4, 5, 6
GND
TM
8
V D D (+ 5V )
7
S TB 3
11
S TB 2
10
S TB 1
9
LAT C H
14
D ATA IN
15
CLOCK
13
TH ER M IS TO R
30K Ω B :3950
LATC H R E G ISTE R
448 B IT S H IFT R E G ISTE R
15 P IN
(Fig.2.1)
Notes : Symbol “
“ : means a negative logic signal.
2.3.1 Head Division Processing
The thermal head has 3 strobes, and print divide into up 3 times is possible.
The relation between strobes and position of heting elements is shown in the
following table :
(Tab.2.2)
S TB N o.
D ot N o.
Dots/STB
1
1 ~ 128
128
2
129 ~ 256
128
3
257 ~ 448
192
MT2460
2-2
2. PRINT HEAD
2.4 PRINTING DATA AND PRINTING POSITION
The data of 448 bits (1 to 448) transferred by DATA IN (DI) are printed in the
arrangement as shown in the following figure :
(Fig.2.2)
P a p er fee d in g d ire ctio n
P rin ting p a p er
P rin ting side
P rin ting d a ta
D ATA IN
P rin te r m e ch a n ism
M oto r
2-3
MT2460
2. PRINT HEAD
2.5 ELECTRICAL CHARACTERISTICS OF CIRCUIT
(Tab.2.3)
Item
SYMBOL
MINI
TYP.
MAXI.
Unit
Head power supply
VH
23.5
24.0
24.5
V
Logic power supply
V dd
4.75
5.0
5.25
V
Logic supply current
Idd
-
-
31.5
mA
Input Voltage (High)
VIH
0.8xVdd
-
V dd
V
Input Voltage (Low)
VIL
0
-
0.2xVdd
V
Data input current (DI) High (1)
ILHDI
-
-
0.5
uA
Data input current (DI) Low
ILLDI
-
-
-0.5
uA
STB 1 to 3 input current (High) (1)
IIHSTR
-
-
1.5
uA
STB 1 to 3 input current (Low)
IILSTR
-
-
-165
uA
Clock input current (High) (1)
ILHCLK
-
-
3.5
uA
Clock input current (Low)
IILLCLK
-
-
-3.5
uA
Latch input current (High) (1)
IIHLAT
-
-
3.5
uA
Latch input current (Low)
IILLAT
-
-
-3.5
uA
Data out output voltage (High)
VDOH
4.45
-
-
V
Data out output voltage (Low)
VDOL
-
1.3
2.0
V
fCLK
0.1
1.0
3.5
MHz
Clock frequency
(1)
Note: Each strobe includes pull-up resistance of 300KΩ ± 50%.
MT2460
2-4
2. PRINT HEAD
2.6 SWITCHING CHARACTERISTICS OF CIRCUIT
The switching characteristic summarized in the following table :
Item
(Tab.2.4)
SYMBOL
MINI
TYP.
MAXI.
Unit
Clock frequency
fMAX
-
-
4.0
Mhz
Clock pulse width
tw(T)
70
-
-
ns
Data setup time
tsu(D)
50
-
-
ns
Data hold time
th(D)
40
-
-
ns
Latch setup time
tsu(LA)
100
-
-
ns
Latch pulse width
tw(LA)
100
-
-
ns
Strobe setup time
tsu(STB)
100
-
-
ns
Strobe to driver
Otuput delay time
TpLH
TpHL
-
-
3.5
µs
(Fig.2.3)
tw (T)
CL OCK
DA TA IN
tsu (D)
th(D)
tw(LA )
LA TC H
tsu(LA)
tsu(STB)
ST RO BE
tpLH
OU TP UT
VO LTAG E
2-5
MT2460
2. PRINT HEAD
2.7 TIMING CHART
(Fig.2.4)
1.0 M H z
CLO CK
DAT A I N
LA T C H
ST RO BE 1,2
ts
ST RO BE 3
0.625 m s
1 line
24V
VH
Notes : Symbol “
“ : means a negative logic signal.
2.8 THERMISTOR
The thermistor is very important to adjust the strobe time (Tstrobe) ~ (SLT) in
function of the head temperature and to monitor the temperature to prevent
the head damage if the temperature is over the limit described in the
Maximum conditions table.
•
•
•
•
Resistance R25 :
B value :
Operating temperature :
Time costant :
30 KΩ ± 5% at 25°C
3950 K ± 2%
–20 ~ + 80°C
Max. 30 sec.(in the air)
Then the resistance value, R, versus temperature , T (in °C) is given by the
formula :
R(T) = R25 * e {B*(1/TX – 1/T25)}
MT2460
2-6
2. PRINT HEAD
(Tab.2.5)
Temperature (°C)
Thermistor Resistance (R)
MIN. (KΩ)
TYP. (KΩ)
MAX. (KΩ)
-20.0
268.8
296.6
326.5
-15.0
202.7
222.3
243.2
-10.0
154.2
168.2
182.9
-5.0
118.4
128.4
138.9
0.0
91.70
98.90
106.4
5.0
71.65
76.71
82.10
10.0
56.20
59.99
63.88
15.0
44.50
47.27
50.10
20.0
35.49
37.53
39.58
25.0
28.50
30.00
31.50
30.0
22.84
24.14
25.46
35.0
18.42
19.55
20.71
40.0
14.95
15.93
16.94
45.0
12.20
13.06
13.94
50.0
10.02
10.76
11.54
55.0
8.271
8.920
9.596
60.0
6.864
7.430
8.021
65.0
5.726
6.219
6.738
70.0
4.799
5.230
5.686
2-7
MT2460
2. PRINT HEAD
2.8.1 Thermistore Curves
(Fig.2.5)
350,000
250,000
200,000
150,000
100,000
50,000
Temperature (°C)
MT2460
2-8
70,00
65,00
60,00
55,00
50,00
45,00
40,00
35,00
30,00
25,00
20,00
15,00
10,00
5,00
0,00
-5,00
-10,00
-15,00
0,000
-20,00
Resistance (KOhm)
300,000
3. STEPPER MOTOR
3.1 STEPPER MOTOR
The paper feed pitch for stepper motor is 2 steps for one dotline(1).
(1)
Note: 1 dotline = 0.125 mm.
3.1.1 Technical specifications
(Tab.3.1)
Item
Specification
Drive voltage
D C 24 V
N o . o f p h ases
2
Drive mode
Bipolar drive
Step angle
18° ± 10%
Rated current
350 mA / Phase
Resistance
12Ω ± 7% at 25 °C (each phase)
Inductance
5.7 mH ± 25% at 25°C (1kHz. 1Vrms )
Holding torque
85 gf-cm MIN
Pull-out torque
45 gf−cm MIN
Insulation resistance
100 MΩ MIN (500 Vdc)
Insulation class
Class E
Dielectric strength
5 mA (at 600V AC 1.0 sec.)
Life
210 Hr min.
Maximum coil temperature 115°C
3-1
MT2460
3. STEPPER MOTOR
3.1.2 Excitation sequence
The motor is driven in the forward direction if its excitation phases are
switched as per the following steps :
Signal
(Tab.3.2)
S eq u en ce
A+
A+
AA-
B+
B+
BB-
Step1
High
Low
Low
High
Step2
High
Low
High
Low
Step3
Low
High
High
Low
Step4
Low
High
Low
High
Excitation Voltage Waveforms
1dot line
(A)
H
STEP1
STEP2
(Fig.3.1)
STEP3
STEP4
L
(A)
H
L
(B)
H
L
(B)
H
L
3.2 PRECAUTION
1.
Drive the motor with mosfet driver to obtain the maximum torque force
instead transistor driver , transistor driver lose voltage VCEsat *2.
2.
Please check the ratio print/pause to prevent the overtemperature on
stepper motor.
3.
If the motor is driven by more than 24 volts we suggest to use a
chopper driving, in order to reduce current, please contact CUSTOM
ENGINEERING SPA for further information.
MT2460
3-2
4. SENSOR
4.1 SENSOR
Maximum Ratings
(Tab.4.1)
(Ta = 25°C)
Parameter
Symbol
Rating
Unit
IF
50
mA
∆ IF /°C
-0.67
mA/°C
Pulse forward current (1)
IFP
400
mA
Reverse voltage
VR
5
V
Collector-emitter voltage
V C EO
30
V
Emitter-collector voltage
V EC O
5
V
PC
50
mW
∆ P C /°C
-0.67
mW/°C
IC
20
mA
Operating temperature range
T opr
-25 ~ 85
°C
Storage temperature range
T stg
-30 ~ 100
°C
Forward current
L
E
D
D
E
T
E
C
T
O
R
(1)
Forward current derating (Ta > 25°C)
Collector power dissipation
Collector power dissipation derating
(Ta > 25°C)
Collector current
NOTE: Pulse width 100 ≤ µs, Repetitive frequency = 100 Hz.
Opto-electrical characteristics
Parameter
LE D
Conditions
MIN.
TYP.
MAX.
Unit
Forward voltage
VF
IF = 10mA
1.00
1.15
1.30
V
Reverse current
IR
V R = 5V
-
-
10
µA
Peak emission
wavelength
λP
IF = 10mA
-
940
-
nm
ICEO
V CE = 10V, IF = 0
-
-
0.1
µA
-
900
-
nm
λP
Collector current (2)
Leakage current
(2)
(Tab.4.2)
Symbol
Collector dark current
DETECTOR Peak sensibility
wavelength
COUPLED
(Ta = 25°C)
Collector-emitter
saturation voltage
IC
V CE = 5V, IF = 10mA
50
-
750
µA
ILEAK
V CE = 5V, IF = 10mA
-
-
0.1
µA
IF = 10mA, IC = 25µA
-
0.15
0.4
V
V CC = 10V, IC = 1 mA
R L = 1K Ω
-
10
-
µs
-
10
-
µs
V CE
(sat)
Rise time
tr
Fall time
tf
NOTE: IC classification R: 50 ~ 150 µΑ, O : 110 ~ 330 µΑ.
4- 1
MT2460
4. SENSOR
4.2 GRAPHICS OF TYPICAL CHARACTERISTICS
Forw ard current I F ( m A )
Forward Current vs. Ambient Temperature
50
40
30
20
10
0
0
40
20
60
80
100
120
140
(Fig.4.1)
A m bient tem perature Ta (°C )
Collector Power dissipation vs. Ambient Temperature
Collector power
dissipation Pc ( m W )
50
40
30
20
10
0
0
20
40
60
80
100
120
Am bient tem perature Ta (°C)
MT2460
4- 2
(Fig.4.2)
4. SENSOR
Forward Current vs. Forward Voltage
50
Forw ard current I F ( m A )
Ta = 25 °C
30
10
Ta = 75 °C
50
5
25
0
-25
3
1
0 .9
1 .0
1 .1
1 .2
1 .3
1 .4
1 .5
(Fig.4.3)
Forw ard voltage V F (V )
Collector Current vs. Forward Current
Collector current I C ( µA )
3 0 00
1 0 00
500
S A M PL E A
300
B
C
100
50
Ta = 25 °C
30
V C E = 5V
V C E = 0.4V
10
1
3
10
30
100
300
1 0 00
(Fig.4.4)
Forw ard current I F ( m A )
4- 3
MT2460
4. SENSOR
Collector Current vs. Collector-Emitter Voltage
60 0
(Fig.4.5)
Collector current I C ( µA )
Ta = 25 °C
50 0
20
40 0
16
30 0
12
20 0
8
I F = 4m A
10 0
0
0
2
4
6
8
10
12
14
Collector em itter voltage V CE (V)
Collector-Emitter Saturation Voltage vs Ambient temperature
0 .2 4
(Fig.4.6)
Collector em itter saturation
voltage V C E(S AT ) (V)
IF = 1 0 m A
I C = 2 5 µA
0 .2 0
0 .1 6
0 .1 2
0 .0 8
0 .0 4
0
- 40
- 20
0
20
40
60
80
Am bient tem perature Ta (°C)
MT2460
4- 4
100
4. SENSOR
Dark current vs Ambient temperature
(Fig.4.7)
D ark Current I D (I CE O ) ( µA)
1
10
-1
V C E = 1 0V
10
5
-2
10
10
-3
-4
0
20
40
60
80
1 00
1 20
1 40
Am bient tem perature Ta (°C)
4- 5
MT2460
5. DIMENSIONS
5.1 DIMENSIONS
The figure 5.1 illustrates the overall dimensions for the MT2460 thermal
printing mechanism.
(Fig.5.1)
(Dimensions in mm)
2,25
38
50
85,4
5- 1
13,3
49
44,25
58,3
5,65
20
MT2460