Custom Audio Electronics MT2460 User manual

OEM
MT2460
MT2460
USER MANUAL

All rights reserved. Total or partial reproduction of this manual in whatever form, whether by printed or elec-
tronic means, is forbidden. While guaranteeing that the information contained in it has been carefully checked,
CUSTOM ENGINEERING SPA and other entities utilized in the realization of this manual bear no responsibility
for how the manual is used.
Information regarding any errors found in it or suggestions on how it could be improved are appreciated. Since
products are subject to continuous check and improvement, CUSTOM ENGINEERING SPA reserves the right
to make changes in information contained in this manual without prior notification.
Copyright © 2002 CUSTOM ENGINEERING S.p.a. – Italy
CUSTOM ENGINEERING S.p.A.
Str. Berettine 2 - 43010 Fontevivo (PARMA) - Italy
Tel.: [phone] - Fax: [phone]
http: www.custom.biz
Customer Service Department:
Email: [email protected]

TABLE OF CONTENTS
1 INTRODUCTION...................................................................................................................................................... 5
1.1 General safety information ............................................................................................................................... 5
1.2 General features............................................................................................................................................... 5
1.3 Print head specifications .................................................................................................................................. 5
2 INSTALLATION AND USE....................................................................................................................................... 7
2.1 Front exterior view of MT2460.......................................................................................................................... 7
3 CONNECTIONS....................................................................................................................................................... 9
3.1 Connections terminals...................................................................................................................................... 9
3.1.1 Thermal head connector ............................................................................................................................. 10
3.1.2 Motor connector .......................................................................................................................................... 10
3.1.3 Electrical circuit block diagrams of motor .................................................................................................... 10
3.1.4 Paper-end/Head-up sensor connector ........................................................................................................ 11
3.1.5 Electrical circuit block diagrams of Paper-end/Head-up sensor.................................................................. 11
4 PRINT HEAD.......................................................................................................................................................... 13
4.1 Operation precautions .................................................................................................................................... 13
4.2 Block diagram of the electrical circuit ............................................................................................................. 14
4.3 Printing data and printing position .................................................................................................................. 15
4.4 Electrical characteristics of circuit .................................................................................................................. 15
4.5 Switching characteristics of circuit.................................................................................................................. 16
4.6 Timing chart.................................................................................................................................................... 16
4.7 Thermistor ...................................................................................................................................................... 17
4.7.1 Thermistore Curves ..................................................................................................................................... 17
5 STEPPER MOTOR ................................................................................................................................................ 19
5.1 Technical specifications.................................................................................................................................. 19
5.2 Excitation sequence ....................................................................................................................................... 19
5.3 Precaution ...................................................................................................................................................... 20
6 SENSOR ................................................................................................................................................................ 21
6.1 Graphics of typical characteristics.................................................................................................................. 22
7 DIMENSIONS......................................................................................................................................................... 27
7.1 DIMENSIONS................................................................................................................................................. 27
TABLE OF CONTENTS
User Manual MT2460 3

TABLE OF CONTENTS
4 MT2460 User Manual

1 INTRODUCTION
1.1 General safety information
• Read and keep the instructions which follow.
• Follow all warnings and instructions indicated.
• Before cleaning the mechanism, disconnect the power supply.
• Clean the mechanism with a damp cloth. Do not use liquid or spray products.
• Do not operate the mechanism near water.
• Do not use the mechanism on unstable surfaces that might cause it to fall and be seriously damaged.
• During the integration of the printer, we strongly warn to keep an adeguate paper loop outlet underneath the
presenter, in order to allow the receipt being properly printed out.
• Only use the mechanism on hard surfaces and in environments that guarantee proper ventilation.
• Make sure the mechanism is placed in such a way as to avoid damage to its wiring.
• Use the type of electrical power supply indicated. If in doubt, contact your retailer.
• Do not introduce foreign objects of any kind into the mechanism as this could cause a short circuit or damage
parts that could jeopardize mechanism functioning.
• Do not spill liquids onto the mechanism.
• Do not carry out technical operations on the mechanism, with the exception of the scheduled maintenance pro-
cedures specifically indicated in the user manual.
1.2 General features
PAPER WIDTH 60 mm
RESOLUTIONS 8 dot/mm (203dpi)
PRINTING SPEED 150 mm/sec.
LOGIC VOLTAGE 3,3 V. 5V
SENSORS Paper end, head up detection, temperature thermistor 30K
LIFE 50 Km printed paper
AUTOLOADING CAPABILITY
COMPACT LAYOUT
HIGH TORQUE PAPER-PULLING MOTOR
SILICON RUBBER PAPER FEEDING ROLL
1.3 Print head specifications
PRINTING METHOD Thermal line dot method
EFFECTIVE PRINTING WIDTH 56 mm
HEAD CONFIGURATION (DOTS/LINE) 448
DOT PITCH 0,125 mm
PRINTING SPEED (see power consumption and energy dots) 150mm/sec.
PAPER WIDTH (MM) 60 mm
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
DOT RESISTANCE (RAV) 700 
1. INTRODUCTION
User Manual MT2460 5

NUMBER OF STROBES 3
HEATER ENERGY
5°C 0,18 mJ/dot (0,24 ms)
25°C 0,15 mJ/dot (0,20 ms)
45°C 0,14 mJ/dot (0,19 ms)
DRIVER SATURATED RESISTANCE (RIC) 33 
EXTERNAL DIMENSIONS (W x D x H) 85,4 x 49 x 20
WEIGHT 72 gr
OPERATION VOLTAGE RANGE LOGIC 3,3 V, 5 V
OPERATION VOLTAGE DOTLINE HEAD 24V± 5%
CURRENT CONSUMPTION 32,5 mA/dots (R = 700 )
LIFE / REABILITY 50 Km 1 x 108pulse
RECOMMENDED PAPER WEIGTH 55 g/m2
RECOMMENDED PAPER KF-50HDA or equivalent
HEAD VOLTAGE VH= 25,2 V (note between connectors)
SUPPLY VOLTAGE VDD = 5,5 V
SUBSTRATE TEMPERATURE 65 °C
ENVIRONMENT OPERATING TEMPERATURE RANGE 5 ÷ 50°C
OPERATING HUMIDITY 10 ÷ 90 % RH no condensation
ENVIRONMENT STORAGE TEMPERATURE (EXCEPT PAPER) -40 ÷ 80 °C
1. INTRODUCTION
6 MT2460 User Manual

2 INSTALLATION AND USE
2.1 Front exterior view of MT2460
Motor1.
Print Head2.
Head up lever3.
Sensor Head up detection4.
Knob paper feed5.
Thermal Head connector6.
A- Paper outfeed
B- Paper input
C- Paper end sensor
1
2
4
3
6
5
B
C
A
2. INSTALLATION AND USE
User Manual MT2460 7

2. INSTALLATION AND USE
8 MT2460 User Manual

3 CONNECTIONS
3.1 Connections terminals
The mechanism has three interface connectors (see following figure), that includes the thermal head connector, motor
connector and paper control connector.
1
6
1
15
4
Paper control
connector
Motor
connector
Thermal head
connector
In the table below are described the connector specifications and functions:
No. Connector Pin No. TYPE
1 Thermal head connector 15 JST connector (or equivalent)
Male S15B-PH-K-S
2
Head-up sensor
6
Molex connector (or equivalent)
female housing 51021-0600
terminal 50058-8000
Paper end sensor
3 Motor connecotr 4
Molex connector
female housing 51021-0400(white)
terminal 50058-8000
3. CONNECTIONS
User Manual MT2460 9

3.1.1 Thermal head connector
The connector’s pin assignments is as follows:
No. 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 VDD Logic power supply
8 TM Thermistor
9STB1 Strobe1 signal (Active low)
10 STB2 Strobe2 signal (Active low)
11 STB3 Strobe3 signal (Active low)
12 NC Not connected
13 CLK Serial clock
14 LATCH Latch (Active low signal)
15 DATA IN Data input
Connector type: JST connector (or equivalent)
Male S15B-PH-K-S
NOTE: The symbol “  “ means a negative logical signal.
3.1.2 Motor connector
The connector’s pin assignments is as follows:
No. SIGNAL FUNCTION
1 MOTA+ Phase 1 coil
2 MOTB+ Phase 2 coil
3 MOTA- Phase 1 coil
4 MOTB- Phase 2 coil
Connector type: Molex connector female housing 51021-0400
terminal 50058-8000
3.1.3 Electrical circuit block diagrams of motor
1
3
2
4
MOTA+
Motor
A
B
MOTA-
MOTB+
MOTB-
3. CONNECTIONS
10 MT2460 User Manual

3.1.4 Paper-end/Head-up sensor connector
The connector’s pin assignments is as follows:
No. SIGNAL FUNCTION
1 C Collector photo transistor paper
2 E Emitter photo transistor paper
3 A LED Anode paper
4 K LED Cathode paper
5 SW1 Switch signal 1 of head-up sensor output
6 SW2 Switch signal 2 of head-up sensor output
Connector type: Molex connector female housing 51021-0600
terminal 50058-8000
3.1.5 Electrical circuit block diagrams of Paper-end/Head-up sensor
3
C
E
A
1
2
4
5
6
SW1
SW2
K
3. CONNECTIONS
User Manual MT2460 11

3. CONNECTIONS
12 MT2460 User Manual

4 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:
Po = Io2x Rav = VH2x Rav Ton = Eo
(Rav + Ric)2Po
SYMBOL PARAMETER VALUE UNIT
Rav Average resistance 700 
Ric Driver saturated resistance 23 
4.1 Operation precautions
When continuous printing is performed the supply energy should be reduced so that the substrate temperature1.
show in Maximum Condition Table.
Power On and Off sequence must be in the following order to prevent the dot element damage:2.
Turn On= Apply the logic supply voltage (Vdd) first and then the printhead supply voltage (VH).
Turn Off= Switch off the printhead supply voltage (VH) first and then turn the logic voltage (Vdd) off.
The printhead shall be disabled in STB during Power ON/OFF, or Power (VH)-Logic(Vdd) sequence described3.
in note 2 shall be kept.
Heat elements and IC’s shall be anti-electrostatic in order to prevent the electrostatic destruction. Do not touch4.
the connector pins with naked hands.
The printhead substrate surface is coated with glass and mechanical stress or shock (including dust scratch dam-5.
age) should be avoided to prevent damage.
When the printhead operation is finished, printsupply voltage (including the charged voltage with capacitor) should6.
be reduced to the ground level and remained until next printhead operation occur.
Condensation should be avoided. If condensation occurred, do not switch on the printhead power until condensa-7.
tion disappear.
If printing sound, for example sticking sound, occured, please review and adjust the paper feed mechanism and8.
the electrical pulse to avoid these kind of mechanical resonance.
Please pay attention that the paper used does not include bad factor to affect printhead life.9.
The print density variation may become larger if the number of dots energized at same time becomes greater10.
than 192 value.
4. PRINT HEAD
User Manual MT2460 13

4.2 Block diagram of the electrical circuit
1, 2, 3 DOT #448 DOT #192
14
15
13
VH (+24V)
CLOCK
DATA IN
12
448 BIT SHIFT REGISTER
LATCH
4, 5, 6
GND
11
9
10
TM THERMISTOR
30KB:3950
8
7
VDD (+3.3V)
STB3
STB1
STB2
DOT #320
3
LATCH REGISTER
Each STB Line is pulled-down within the driver IC
STB No. Dot No. Dots/STB
1 1 ~ 192 192
2 193~ 320 128
3 321 ~ 448 128
4. PRINT HEAD
14 MT2460 User Manual

4.3 Printing data and printing position
Print data of 448-bits length (1 to 448), transferred by DATA IN(DI), are printed in the arrangement as shown in the
following figure :
Printing data
Printing paper
DATA IN
Printer mechanism
Motor
1 2 3 4 . . . . . . . 447 448
Printing surface
Paper feeding
direction
4.4 Electrical characteristics of circuit
ITEM SYMBOL MINI TYP. MAXI. UNIT CONDITIONS
Head power supply VH23.5 24.0 24.5 V
Logic power supply VDD 3.00 3.3 5.5 V
Logic supply current IDD - 5.6 17.5 mA
VDD = 3.3 V
fCLK = 5 MHz
SI = fCLK/2
Input Voltage High VIH 0.8 x VDD -V
DD VSTB, DI, LAT, CLK
Low VIL 0 - 0.2 x VDD V
Data input current
(DI)
High(1) IIH DI - - 0.5 A
VDD = 3.3V
VIH = 5V
TA = 25°C
Low IIL DI -0.5 - - AVDD = 3.3V
VIL = 0V
STB input current
(STB)
High(1) IIH STB - - 1.5 A
VDD = 3.3V
VIH = 5V
TA = 25°C
Low IIL STB -66 - - AVDD = 3.3V
VIL = 0V
Clock input current
(CLK)
High(1) IIH CLK - - 3.5 A
VDD = 3.3V
VIH = 5V
TA = 25°C
Low IIL CLK -3.5 - - AVDD = 3.3V
VIL = 0V
Latch input current
(LAT)
High(1) IIH LAT - - 3.5 AVDD = 3.3V
VIH = 5V
Low IIL LAT -3.5 - -3 AVDD = 3.3V
VIL = 0V
(1) Note: Each strobe includes pull-up resistance of 300K± 50% per IC.
4. PRINT HEAD
User Manual MT2460 15

4.5 Switching characteristics of circuit
The switching characteristic summarized in the following table :
ITEM SYMBOL MIN. TYP. MAX. UNIT
Clock frequency fMAX - - 5.0 MHz
Clock pulse width tw(T) 70 - - ns
Data set-up time tsu(D) 40 - - ns
Data hold time th(D) 40 - - ns
Latch set-up time tsu(LA) 100 - - ns
Latch pulse width tw(LA) 100 - - ns
Strobe set-up time tsu(STB) 100 - - ns
Strobe to driver
Output delay time
tpLH
tpHL --18s
CLOCK
DATA IN
LATCH
STROBE
OUTPUT
VOLTAGE
tw(T)
tsu(D) th(D)
tsu(LA)
tw(LA)
tpLH
tsu(STB)
tpHL
4.6 Timing chart
CLOCK
DATA IN
VH
STROBE 3
STROBE 1,2
LATCH
0.625 ms
1 line
ts
24V
1.0 MHz
NOTES: The symbol “  “ means a negative logical signal.
4. PRINT HEAD
16 MT2460 User Manual

4.7 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: 30 K± 5% at 25°C•
B value: 3950 K ± 3%•
Operating temperature: –20 ~ + 80°C•
Time costant: 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) }
4.7.1 Thermistore Curves
0,000
50,000
100,000
150,000
200,000
250,000
300,000
-20,00 -15,00 -10,00
-5,00
0,00 5,00
10,00 15,00 20,00 25,00 30,00 35,00 40,00 45,00 50,00 55,00 60,00 65,00 70,00
°
Temperature (°C)
Resistance (K)
4. PRINT HEAD
User Manual MT2460 17

4. PRINT HEAD
18 MT2460 User Manual

5 STEPPER MOTOR
The paper feed pitch for stepper motor is 2 steps for one dotline(1).
(1) Note: 1 dotline = 0.125 mm.
5.1 Technical specifications
ITEM SPECIFICATION
Drive voltage DC 24 V
No. of phases 2
Drive mode Bipolar drive
Step angle 18° ± 10%
Rated current 350 mA / Phase
Resistance 12± 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 M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
5.2 Excitation sequence
The motor is driven in the forward direction if its excitation phases are switched as per the following steps:
(PH2B)
(PH1B)
(PH1A)
(PH2A)
H
L
H
L
H
L
H
L
STEP1 STEP2 STEP3 STEP4
1 dot line
Excitation Voltage Waveforms
SEQUENCE SIGNAL
PH2B PH1B PH1A PH2A
Step1 High Low Low High
Step2 High Low High Low
Step3 Low High High Low
Step4 Low High Low High
5. STEPPER MOTOR
User Manual MT2460 19

5.3 Precaution
Drive the motor with mosfet driver to obtain the maximum torque force instead transistor driver , transistor driver1.
lose voltage VCEsat *2.
Please check the ratio print/pause to prevent the overtemperature on stepper motor.2.
If the motor is driven by more than 24 volts we suggest to use a chopper driving, in order to reduce current, please3.
contact CUSTOM ENGINEERING SPA for further information.
5. STEPPER MOTOR
20 MT2460 User Manual