Custom Engineering MT002-1 User manual

OEM
USER MANUAL
MT002-1
MT002-1

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 © 2009 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.it
Customer Service Department:
Email: [email protected]

TABLE OF CONTENTS
1 INTRODUCTION........................................................................................................................................1-1
1.1 General safety information .................................................................................................................1-1
1.2 General features.................................................................................................................................1-1
1.3 Print head specifications ....................................................................................................................1-1
2 INSTALLATION AND USE..........................................................................................................................2-1
2.1 Mechanism components ....................................................................................................................2-1
3 CONNECTIONS.........................................................................................................................................3-1
3.1 Connections terminals........................................................................................................................3-1
3.2 Electrical circuit block diagrams .........................................................................................................3-2
4 PRINT HEAD..............................................................................................................................................4-1
4.1 Operation precautions ........................................................................................................................4-1
4.2 Block diagram of the electrical circuit .................................................................................................4-2
4.3 Printing data and printing position ......................................................................................................4-3
4.4 Electrical characteristics of circuit ......................................................................................................4-3
4.5 Switching characteristics of circuit......................................................................................................4-4
4.6 Timing chart........................................................................................................................................4-4
4.7 Thermistor ..........................................................................................................................................4-5
4.7.1 Thermistore Curves .........................................................................................................................4-5
5 STEPPER MOTOR ....................................................................................................................................5-1
5.1 Technical specifications......................................................................................................................5-1
5.2 Excitation sequence ...........................................................................................................................5-1
5.3 Precaution ..........................................................................................................................................5-2
6 SENSOR ....................................................................................................................................................6-1
6.1 graphics of typical characteristics.......................................................................................................6-2
7 DIMENSIONS.............................................................................................................................................7-7
TABLE OF CONTENTS
User Manual MT002-1 i

TABLE OF CONTENTS
ii MT002-1 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 dam-
age 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
procedures specifically indicated in the user manual.
1.2 General features
PAPER WIDTH 58 mm +0 / -1
RESOLUTIONS 8 dot/mm (203dpi)
PRINTING SPEED up to 90 mm/sec.
SENSORS Paper end, temperature thermistor 30K
LIFE 50 Km printed paper
AUTOLOADING CAPABILITY
COMPACT LAYOUT
1.3 Print head specifications
PRINTING METHOD Thermal line dot method
EFFECTIVE PRINTING WIDTH 48 mm ±0.2 mm
HEAD CONFIGURATION (DOTS/LINE) 384
DOT PITCH 0,125 mm
PRINTING SPEED Up to 90 mm/sec
PAPER WIDTH (MM) 58 mm ±0.1 mm
PAPER ROLL MAXIMUM DIAMETER 60 mm
PAPER FEED METHOD Friction feed, 1 dot line / 2pulse, bipolar
HEAD TEMPERATURE SENSOR Thermistor
PAPER DETECTION Photo interrupter reflessive
MAXIMUM NUMBER OF DOTS ACTIVATED AT A TIME 100
DOT RESISTANCE (RAV) 176 ±4%
NUMBER OF STROBES 2
1. INTRODUCTION
User Manual MT002-1 1-1

HEADER ENERGY
5°C 0,16 mJ/dot (0,68 ms) VH=7.2V
25°C 0,13 mJ/dot (0,55 ms) VH=7.2V
45°C 0,11 mJ/dot (0,47 ms) VH=7.2V
DRIVER SATURATED RESISTANCE (RIC) 9 
EXTERNAL DIMENSIONS (W x D x H) 67,3 x 17,4 x 33
WEIGHT 36 gr
OPERATION VOLTAGE THERMAL HEAD Logic power supply VDD = 3÷5.25 V (absolute max. ratings)
Head power supply VH= 7.2÷8.5 V (absolute max. ratings)
CURRENT CONSUMPTION
Medium 2,5 A
Max 4 A
Peak 3 A
LIFE / REABILITY 50 Km 1 x 108pulse
RECOMMENDED PAPER WEIGTH 55 g/m2
RECOMMENDED PAPER OJI KF-50HDA or equivalent
NOISE Max 51 bA
HEAD VOLTAGE VH= 8,5 V
SUPPLY VOLTAGE VDD = 7 V
SUBSTRATE TEMPERATURE 65 °C
ENVIRONMENT OPERATING TEMPERATURE RANGE -10 ÷ 50°C
OPERATING HUMIDITY 10 ÷ 90 % RH no condensation
ENVIRONMENT STORAGE TEMPERATURE (EXCEPT PAPER) -20 ÷ 70 °C
1. INTRODUCTION
1-2 MT002-1 User Manual

2 INSTALLATION AND USE
2.1 Mechanism components
Paper outfeed1.
Print Head2.
Knob paper feed3.
Print Head flat cable4.
Paper outfeed5.
Paper end sensor6.
1 2 3 4
5
6
2. INSTALLATION AND USE
User Manual MT002-1 2-1

2. INSTALLATION AND USE
2-2 MT002-1 User Manual

3 CONNECTIONS
3.1 Connections terminals
The mechanism has one interface connector, that includes the thermal head signal, motor control and paper
sensor control. The connector’s pin assignments is as follows:
1
30
Bottom circuit
No. SIGNAL FUNCTION
1 Led cathode
Paper end sensor
2Photo-transistor
Anode / Collector
3Photo-transistor
emitter
4 N.C.
5 N.C:
6 VH Head power supply
7 VH Head power supply
8 DI Data input
9 CLK Serial clock
10 GND Ground
11 GND Ground
12 STB6 Strobe6 signal
13 STB5 Strobe5 signal
14 STB4 Strobe4 signal
15 VDD Logic voltage
16 TM Thermistor
17 TM Thermistor
18 STB3 Strobe3 signal
19 STB2 Strobe2 signal
20 STB1 Strobe1 signal
21 GND Ground
22 GND Ground
23 LAT Latch
24 DO Data output
25 VH Head power supply
26 VH Head power supply
27 PH1A
Motor
28 PH2A
29 PH1B
30 PH2B
Connector type: ZIF connector for flexible printed circuit 30 pin
(pitch 1 mm)
NOTE: The thermistore of print head is connected to VDD on the capton.
3. CONNECTIONS
User Manual MT002-1 3-1

3.2 Electrical circuit block diagrams
28
30
29
27
5
4
3
2
1
6
7
PH2A
Motor
B
A
PH2B
PH1B
PH1A
1
2
3
4
5
6
7
28
27
29
30
CATHODE
ANODE / COLLECTORE
EMITTER
MOTOR PAPER END SENSOR
3. CONNECTIONS
3-2 MT002-1 User Manual

4 PRINT HEAD
MT002-1 has a thickfilm thermal printhead and is allowed to have 4.0 A maximum power absorbed, the print
density variation may become larger if the number of dots energized at same time becomes greater than 64.
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 Rave Ton = Eo
(Rcom x N + Rave + Ric + Ric)2Po
or
Po = Eo VH = Po x (Rcom x N + Rav + Ric)
Ton Rav
SYMBOL PARAMETER VALUE UNIT
Rav Average resistance (Heater resistance + Lead resistance) 176 
N No. of burning dots at same time (example 100) dots
Rcom Common Resistance 0.05 
Ric Driver saturated resistance 9 
4.1 Operation precautions
When continuous printing is performed the supply energy should be reduced so that the substrate tem-1.
perature 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 de-3.
scribed in note 2 shall be kept.
Heat elements and IC’s shall be anti-electrostatic in order to prevent the electrostatic destruction. Do not4.
touch the connector pins with naked hands.
The printhead substrate surface is coated with glass and mechanical stress or shock (including dust scratch5.
damage) should be avoided to prevent damage.
When the printhead operation is finished, printsupply voltage (including the charged voltage with capacitor)6.
should 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 until7.
condensation disappear.
Print quality would be degraded if paper or ink residue were sticked on the heat element area. For such a8.
case, please use applicator with alcohol to clean up. Do not use the sandpaper destroying the heat ele-
ments.
If printing sound, for example sticking sound, occured, please review and adjust the paper feed mechanism9.
and 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.10.
The print density variation may become larger if the number of dots energized at same time becomes11.
greater than 100.
In order to avoid surge, a 47 F capacitor is required between VH and GND at controller board side. 0.112.
F ceramic capacitor should be placed between VDD and GND.
4. PRINT HEAD
User Manual MT002-1 4-1

4.2 Block diagram of the electrical circuit
THERMISTOR
30KΩB:3950
25, 26 DOT #384 DOT #1
10, 11, 21, 22
12
23
8
9
16
17
VH
GND
TM
TM
CLK
DO
DI
LAT
15
Vdd
STB6
13
STB5
14
STB4
18
STB3
19
STB2
24
126543
LATCH REGISTER
SHIFT REGISTER
20
STB1
STB No. Dot No. Dots/STB
1 1 ~ 64 64
2 65 ~ 128 64
3 129 ~ 192 64
4 193 ~ 256 64
5 257 ~ 320 64
6 321 ~ 384 64
4. PRINT HEAD
4-2 MT002-1 User Manual

4.3 Printing data and printing position
Print data of 384-bit length is printed in the arrangement as shown in the following figure :
Printing data
Printing paper
DATA IN
Printer mechanism
Motor
1 2 3 4 . . . . . . 383 384
Printing surface
Paper
feeding
direction
4.4 Electrical characteristics of circuit
ITEM SYMBOL MINI TYP. MAXI. UNIT CONDITIONS
Head power supply VH- 7.2 8.5 V
Logic power supply VDD 3.00 5.00 5.25 V
Logic supply current IDD - - 54 mA fDI = 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 IIH DI - - 0.5 uA
VIH = 5V
VIL = 0V
Low IIL DI - - -0.5 uA
STB input current
(STB)
High IIH STB - - 30 uA
Low IIL STB - - -0.5 uA
Clock input current
(CLK)
High IIH CLK - - 3 uA
Low IIL CLK - - -3 uA
Latch input current
(LAT)
High IIH LAT - - 3 uA
Low IIL LAT - - -3 uA
4. PRINT HEAD
User Manual MT002-1 4-3

4.5 Switching characteristics of circuit
The switching characteristic summarized in the following table :
ITEM SYMBOL MIN. TYP. MAX. UNIT CONDITIONS
Clock frequency fCLK -58 MHz VDD= 5.0V
- 3 5 VDD = 3.3V
Clock width tw CLK 95 (155) - - ns VDD= 5.0V, fCLK = 5MHz
VDD= 3.3V, fCLK = 3MHz
Data set-up time t setup DI 100 (140) - - ns
Data hold time t hold DI 85 - - ns
Data out delay time td DO -50- ns VDD= 5.0V
- 90 - VDD = 3.3V
Latch width tw LAT 150 - - ns
Latch set-up time t setup LAT 200 - - ns
Latch Hold time t hold LAT 80 - - ns
STB set-up time t setup STB 300 - - ns
Driver out delay time tdo - - 10 (30) s VDD= 5.0V (VDD= 3.3V)
NOTES: CLK should be used at duty 50% (± 5%), if operated more than fCLK = 5MHz (or fCLK = 3MHz when
VDD = 3.3 V). Also, CLK should be within one cycle , being subject to the ratio between DATA SET-UP TIME
and DATA HOLD TIME is 1:1.
4.6 Timing chart
CLOCK (CLK)
LATCH (LAT)
High : HOLD
Low : THROUGH
DRIVER OUT
STROBE (STB)
DATA OUT (DO)
High: BLACK
Low: WHITE
DATA IN (DI)
High: BLACK
Low: WHITE
Tw CLK
td DO
t setup DI t hold DI
tw LAT
tdo tdo
t setup STB
t setup LAT t hold LAT
NOTES: The symbol “  “ means a negative logical signal.
4. PRINT HEAD
4-4 MT002-1 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 KW ± 5% at 25°C•
B value: 3950 K ± 2%•
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
180
140
TEMPERATURE : ( °C )
RESISTANCE : (K )Ω
020
30 40 50 7
0
-20
100
20
80
40
60
120
160
-10 10 60
4. PRINT HEAD
User Manual MT002-1 4-5

4. PRINT HEAD
4-6 MT002-1 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 5.5 V
No. of phases 2
Drive mode Bipolar drive
Step angle 18° ± 2°
Rated current 350 mA / Phase
Resistance 12± 7% at 25 °C (each phase)
Inductance 3.7 mH ± 25% at 25°C (1kHz. 1Vrms )
Holding torque 33.7 gf-cm MIN
Pull-out torque (1200 pps) 13.3 gf-cm MIN
Insulation resistance 100 MMIN (500 Vdc)
Insulation class Class E
Dielectric strength AC 500V 1 min.
Life 3000 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 MT002-1 5-1

5.3 Precaution
Drive the motor with mosfet driver to obtain the maximum torque force instead transistor driver , transistor1.
driver 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 5 volts we suggest to use a chopper driving, in order to reduce current,3.
please contact CUSTOM ENGINEERING SPA for further information.
5. STEPPER MOTOR
5-2 MT002-1 User Manual

6 SENSOR
Maximum Ratings (Ta = 25°C)
PARAMETER SYMBOL RATING UNIT
Input
Power dissipation PD75 mW
Reverse voltage VR5V
Forward current IF50 mA
Pulse forward current(1) IFP 1A
Output
Collector power dissipation PC50 mW
Collector current IC20 mA
Collector-emitter voltage VCEO 30 V
Emitter-collector voltage VECO 3V
Operating temperature range TOPR -20 ~ 85 °C
Storage temperature range TSTG -30 ~ 100 °C
(1) Note: Pulse width 100 s, Repetitive frequency = 100 Hz.
Opto-electrical characteristics (Ta = 25°C)
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX UNIT
Input
Forward voltage VFIF= 10 mA - - 1.3 V
Reverse current IRVR= 5 V - - 10 A
Peak emission wavelength PIF= 10 mA - 940 - nm
Output Collector dark current ICEO VCE = 10 V - - 0.2 A
Peak sensibility wavelength P- 900 - nm
Light current ILVCE = 5 V, IF= 10 mA 90 - - A
Leakage current ILEAK VCE = 5 V, IF = 10 mA - - 0.2 A
Switching
speeds
Rise time trVCC = 2 V, IC= 0.1 mA
RL= 1 K
-30-s
Fall time tf-25-s
6. SENSOR
User Manual MT002-1 6-1

6.1 graphics of typical characteristics
Collector Power dissipation vs. Ambient Temperature
Forward Current vs. Forward Voltage
6. SENSOR
6-2 MT002-1 User Manual