Seiko MTP Series Use and care manual

MTP SERIES
THERMAL
PRINTER MECHANISM
TECHNICAL REFERENCE
39019-2352-01
Seiko Instruments Inc.
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MTP SERIES THERMAL PRINTER MECHANISM TECHNICAL REFERENCE
Document Number 39019-2352-01
January 1995
Copyright 1995 by Seiko Instruments Inc.
All rights reserved.
Seiko Instruments Inc. (SII) has prepared this manual for use by SII personnel,
licensees, and customers. The information contained herein is the property of SII
and shall not be reproduced in whole or in part without the prior written approval of
SII.
SII reserves the right to make changes without notice to the specifications and
materials contained herein and shall not be responsible for any damages (including
consequential) caused by reliance on the materials presented, including but not
limited to typographical, arithmetic, or listing errors.
SII is a trademark of Seiko Instruments Inc.
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iii
PREFACE
This reference manual describes the specifications and basic operating procedures
for the MTP Series Themal Printer Mechanisms. Read it thoroughly so that you are
able to use the MTP Series Themal Printer Mechanisms properly.
Fully investigate the intellectual proprietary rights of the sample circuits designed in
this manual before using.
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iv

v
TABLE OF CONTENTS
Section Page
CHAPTER 1 FEATURES
CHAPTER 2 SPECIFICATIONS
2.1 PART NUMBER....................................................................................... 2-1
2.2 GENERAL SPECIFICATIONS................................................................. 2-2
2.2.1 Character Printers ..................................................................... 2-2
2.2.2 Graphic Printers......................................................................... 2-4
2.3 MOTOR DRIVE CHARACTERISTICS..................................................... 2-6
2.4 TG (TACHO-GENERATOR) OUTPUT CHARACTERISTICS ................. 2-9
2.5 HOME SWITCH....................................................................................... 2-10
2.6 THERMAL PRINT HEAD......................................................................... 2-11
2.6.1 Head Specifications................................................................... 2-11
2.6.2 Head Applied Energy Correction............................................... 2-12
2.6.3 Head Activation Pulse Width..................................................... 2-12
2.6.4 Control of Printing Pulse Width ................................................. 2-13
2.6.5 Intialization................................................................................. 2-14
2.6.6 Paper Feeding........................................................................... 2-14
CHAPTER 3 PIN ASSIGNMENT
3.1 B HEAD-MOUNTED PRINTER ............................................................... 3-1
3.1.1 Thermal Head Control Pin......................................................... 3-1
3.1.2 Motor and Switch Control Pin.................................................... 3-2

vi
Section Page
3.2 G HEAD-MOUNTED PRINTER............................................................... 3-3
3.2.1 Thermal Head Control Pin......................................................... 3-3
3.2.2 Motor and Switch Control Pin.................................................... 3-3
3.3 E HEAD-MOUNTED PRINTER............................................................... 3-4
3.3.1 Thermal Head Control Pin......................................................... 3-4
3.3.2 Motor and Switch Control Pin.................................................... 3-4
CHAPTER 4 TIMING CHART
4.1 TIMING CHART ...................................................................................... 4-1
4.2 DETAILED CHART OF PRINTING START TIMING............................... 4-3
4.3 CONTINUOUS PRINTING OPERATION................................................ 4-3
4.3.1 Home Switch Signal Method..................................................... 4-3
4.3.2 Home Switch Signal Method..................................................... 4-4
CHAPTER 5 APPEARANCE AND DIMENSIONS
CHAPTER 6 SAMPLE CIRCUIT BLOCK DIAGRAM
CHAPTER 7 DESIGNING AND HANDLING PRECAUTIONS
7.1 DESIGN PRECAUTIONS........................................................................ 7-1
7.2 HANDLING PRECAUTIONS................................................................... 7-1
CHAPTER 8 DESIGN OF PERIPHERAL DEVICES
8.1 MOUNTING THE PRINTER.................................................................... 8-1
8.1.1 MTP102 Printer......................................................................... 8-1
8.1.2 MTP201 and 401 Printers......................................................... 8-2
8.2 MOUNTING THE PAPER CUTTER........................................................ 8-4
8.3 MOUNTING A ROLL HOLDER FOR HEAD SENSITIVE PAPER........... 8-5
8.4 THERMAL PAPER TAKE-UP DEVICE................................................... 8-6

vii
8.5 FLEXIBLE CABLE................................................................................... 8-7
8.5.1 Connecting and Fixing the Flexible Cable Terminal.................. 8-7
8.5.2 Bend Radius of Flexible Cable.................................................. 8-7
8.6 REPLACEMENT OF HEAD UNIT............................................................ 8-8
8.6.1 Removing Head Unit ................................................................. 8-8
8.6.2 MOUNTING THE HEAD UNIT .................................................. 8-10
TABLES
Table Page
2-1 Character Printer Specifications .............................................................. 2-2
2-2 Graphic Printer Specifications ................................................................. 2-4
2-3 TG Output................................................................................................ 2-9
FIGURES
Figure Page
2-1 Motor Drive Characteristics...................................................................... 2-6
2-2 Motor Drive Signal Timing........................................................................ 2-7
2-3 Sample Motor Drive Circuit...................................................................... 2-8
2-4 Sample TG waveform shaping circuit...................................................... 2-9
2-5 TG Timing Signal..................................................................................... 2-9
2-6 OFF-to-ON Detection............................................................................... 2-10
2-7 ON-to-OFF Detection............................................................................... 2-10
2-8 Pulse Width Control................................................................................. 2-13
2-9 Sample Pulse Width Control Circuit......................................................... 2-14
3-1 Thermal Head Control Pin Assignment (B Head-mounted Printer) ......... 3-1
3-2 Motor and Switch Control Pin Assignment
(B Head-mounted Printer, MTP102)........................................................ 3-2
3-3 Motor and Switch Control Pin Assignment
(B Head-mounted Printer, MTP201 and MTP401)................................... 3-2
3-4 Thermal Head Control Pin Assignment (G Head-mounted Printer)......... 3-3
3-5 Motor and Switch Control Pin Assignment (G Head-mounted Printer).... 3-3
3-6 Thermal Head Control Pin Assignment (E Head-mounted Printer) ......... 3-4
3-7 Motor and Switch Control Pin Assignment (E Head-mounted Printer)..... 3-4

viii
Figure Page
4-1 Timing Chart............................................................................................ 4-2
4-2 Printing Start Timing Chart...................................................................... 4-3
4-3 Continuous Printing Timing Chart (Home Switch Detection Method)...... 4-3
4-4 Continuous Printing Timing Chart (Timing Signal Count Method)........... 4-4
5-1 MTP102 (B head-mounted) Appearance and External Dimensions........ 5-2
5-2 MTP201 (B head-mounted) Appearance and External Dimensions........ 5-3
5-3 MTP201 (E head-mounted) Appearance and External Dimensions........ 5-4
5-4 MTP401 (B head-mounted) Appearance and External Dimensions........ 5-5
5-5 MTP201 (G head-mounted) Appearance and External Dimensions....... 5-6
5-6 MTP401 (G head-mounted) Appearance and External Dimensions....... 5-7
6-1 Sample Circuit Block Diagram (B Head-mounted Printer)....................... 6-2
6-2 Sample Circuit Block Diagram (G Head-mounted Printer) ..................... 6-3
8-1 MTP102 Printer (Back)............................................................................ 8-1
8-2 Mounting with Screws (MTP102 Printer)................................................. 8-1
8-3 Mounting without Screws (MTP102 printer)............................................. 8-2
8-4 MTP201 and 401 Printers (Back)............................................................ 8-2
8-5 Mounting with Screws (MTP201 and 401 Printer)................................... 8-3
8-6 Mounting without Screws (MTP201 and 401 Printer).............................. 8-3
8-7 Mounting the Paper Cutter ...................................................................... 8-4
8-8 Mounting a Roll Holder for Heat Sensitive paper .................................... 8-5
8-9 Roll without Core..................................................................................... 8-5
8-10 Bend Radius of Flexible Cable................................................................ 8-7
8-11 Moving the Head Carrier ......................................................................... 8-8
8-12 Removing the Flexible Lead Wire ........................................................... 8-8
8-13 Pulling out the Flexible Cable Plate......................................................... 8-9
8-14 Pulling Out the Head Unit........................................................................ 8-9
8-15 Inserting the Head Unit Terminal............................................................. 8-10
8-16 Rotating the Head Portion of the Unit...................................................... 8-10
8-17 Sliding the Head along the Guide of the Head Carrier............................ 8-11
8-19 Inserting the Flexible Cable..................................................................... 8-11
8-18 Pushing the Flexible Cable PLate .......................................................... 8-11

1 - 1
CHAPTER 1
FEATURES
The MTP Series Line Thermal Printer Mechanism is a series of compact, thermal
printers designed to meet the demand for small, low cost units. It can be used in
adding machines, measuring instruments and analyzers, office machines, medical
apparatus, and data terminal devices.
The MTP Series Line Thermal Printer Mechanism has the following features:
• Low cost
• Maintenace-free
• High quality printing
• Battery drive
• Silent, nonimpact system
• Designed for versatile applications
• High reliability
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1 - 2

2 - 1
CHAPTER 2
SPECIFICATIONS
2.1 PART NUMBER
(1) Character printers
MTP −➀: Base model code
➁: Characters per line*
➂: Print head type used
* Maximum number of characters per line based on character matrix in General
Specifications.
(2) Graphic printers
MTP −➀: Base model code
➂: Print head type used
➃: Maximum number of dots per row per line
➂➃
➀➁➂
➀
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2 - 2
2.2 GENERAL SPECIFICATIONS
2.2.1 Character Printers
Table 2-1 Character Printer Specifications
Item Specifications
Base model code MTP102 MTP201 MTP401
Model MTP102-13B MTP102-16B MTP201-20B MTP201-24B MTP401-40B
Printing metod Thermal serial dot printing
Printing direction left to right with respect to the direction the paper is fed.
Dots per line
(H ×W / line)
7 dots×89 dots 7 dots
×110 dots 7 dots ×138 dots 7 dots ×166 dots 7 dots ×278 dots
Paper feed pitch
(H ×W)
0.35mm
×0.30mm 0.35mm ×0.24mm 0.35mm ×0.33mm 0.35mm ×0.28mm 0.35mm
×0.24mm
Character matrix
(H ×W) 7 ×5 dot matrix
Character size
(H ×W)
2.4mm
×1.5mm 2.4mm ×1.2mm 2.4mm×1.6mm 2.4mm ×1.4mm 2.4mm ×1.2mm
Characters per line 13 dot (2 dot
spaces)
16 dot (2 dot
spaces)
20 dot (2 dot
spaces)
24 dot (2 dot
spaces)
40 dot (2 dot
spaces)
Printing width 26.7mm 26.4mm 45.9mm 46.0mm 66.7mm
Printing speed
(room temperature,
5.0V)
Approx.1.5
line / s
Approx.1.2
line / s
Approx.1.0
line / s
Approx.0.9
line / s
Approx.0.5
line / s
Paper feed pitch 3.8mm
Head activation
timting detection Via a tachogenerator
Home position
detection Via a mechanical switch
Operating voltage
range DC5.0V±1.0V
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2 - 3
Table 2-1 Character Printer Specifications (continued)
Item Specifications
during
printing 3.2A max.
during
paper
feed
250mA max.
Operating temperature
range 0 to 50°C
Storage temperature
range -40 to 60°C
Life span 5 hundred thousand lines (5.0V rated enrgy, room temperature, “8” full
line printing)
Failure rate 10-6 / line or less (5.0V rated enrgy, room temperature, “8” full line
printing)
Operating noise (room
temperature, 5.0V) 70dB or less (back ground noise: 40dB or less, measuring distance: 15cm, weighing: JIS A curve, dynamic characteristics : SLOW range)
Paper feed force 20g or more 50g or more
Paper hold force 50g or more 100g
Dimensions
(WDH) 48×31×13.8mm 70×34×14.4mm 91.5×35.5
×20mm
Weight Approx. 35g Approx. 40g Approx. 50g
Paper width 38−1
0mm 58−1 0mm 80−1 0mm
Paper thickness 65±5 µ m
Recommended thermal
paper Maker /Sensitivity Normal High sensitivity
Nippon Paper Industries TP50KS-A TF50KS-E2C
Honshu Paper Co., Ltd. FH65BX-14N FH65BU-2
Mitsubishi Paper Co., Ltd. F-200U7N5 F-200U9W3
Current
consumption
(room
temperature,
5.0V)
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2 - 4
2.2.2 Graphic Printers
Table 2-2 Graphic Printer Specifications
Item Specifications
Base model code MTP201 MTP401
Model MTP201-G128 MTP201-G166 MTP401-G256 MTP201-G280
Printing metod Thermal serial dot printing
Printing direction left to right with respect to the direction the paper is fed.
Dots per line
(H×W / line)
8 dots
×128 dots 8 dots ×166 dots 8 dots ×256 dots 8 dots ×280 dots
Paper feed pitch
(H×W)
0.35mm
×0.35mm 0.35mm ×0.28mm 0.35mm ×0.26mm 0.35mm ×0.24mm
Character matrix
(H×W) 7×5 dot matrix
Character size
(H×W)
2.4mm×1.7mm 2.4mm×1.4mm 2.4mm×1.3mm 2.4mm×1.2mm
Characters per line 18 dot (2 dot
spaces)
24 dot (2 dot
spaces)
36 dot (2 dot
spaces)
40 dot (2 dot
spaces)
Printing width 44.7mm 46.0mm 66.6mm 67.2mm
Printing speed
(room temperature,
5.0V)
Approx.0.9
line / s
Approx.0.9
line / s
Approx.0.5
line / s
Approx.0.5
line / s
Paper feed pitch 2.8mm
Head activation timing
detection Via a tachogenerator
Home position
detection Via a mechanical switch
Operating voltage
range DC5.0V±1.0V
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2 - 5
Table 2-2 Graphic Printer Specifications
Item Specifications
during
printing 3.2A max.
during
paper
feed
250mA max.
Operating temperature
range 0 to 50°C
Storage temperature
range -40 to 60°C
Life span 5 hundred thousand lines (5.0V rated energy, room temperature, “8” full
line printing)
Failure rate 10-6 / line or less (5.0V rated enrgy, room temperature, “8” full line
printing)
Operating noise (room
temperature, 5.0V)
70dB or less (back ground noise : 40dB or less, measuring distance:
15cm, weighing network: JIS A curve,dynamic characteristics: SLOW
range)
Paper feed force 20g or more
Paper hold force 50g or more 100g or more
Dimensions
(W×D×H) 70×34×14.4mm 91.5×35.5×20mm
Weight Approx. 40g Approx. 50g
Paper width 58 mm 80 mm
Paper thickness 65±5 µ m
Recommended thermal
paper Maker /Sensitivity Normal High sensitivity
Nippon Paper Industries TP50KS-A TF50KS-E2C
Honshu Paper Co., Ltd. FH65BX-14N FH65BU-2
Mitsubishi Paper Co., Ltd. F-200U7N5 F-200U9W3
* Only high-sensitivity thermal papers can be used with the MTP201-
16E.
Current
consumption
(room
temperature,
5.0V)
0
-1
0
-
1
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2 - 6
2.3 MOTOR DRIVE CHARACTERISTICS
The motor is the power source for head movement and paper feed. Through the
application of DC voltage to the motor, the head automatically moves back and
forth, and paper fed on its return; therefore, there is no need to reverse the motor.
(1) Motor terminal voltage 5.0±1.0 VDC
(2) Motor power consumtion
During printing 170 mA max. (room temperature, room
humidity, 5.0 VDC)
During paper feeding 250 mA max. (room temperature, room
humidity, 5.0 VDC)
Commencing movement 700 mA max. (room temperature, room
humidity, 5.0 VDC)
Ceasing movement 500 mA max. (room temperature, room
humidity, 5.0 VDC)
Starting
Printing
Paper feeding
170mA max. 250mA max.
Stopping
Time
25 ms max.
(when applying the brake)
Current
500mA max.
700mA max.
Figure 2-1 Motor Drive Characteristics
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2 - 7
(3) Motor stop signal Stop the motor drive signal within 1 ms after
detecting a home switch “OFF” (100 to 250
µ
s) signal, and input a motor stop signal of at
least 25 ms.
Fi
g
ure 2-2 Motor Drive Si
g
nal Timin
g
* See Section 2.5, Home Switch, for home switch signal.
Home switch signal
Motor drive signal
Motor stop signal
ON
100∼250
µ
s
OFF
1 ms max.
25 ms min.
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2 - 8
Fi
g
ure 2-3 Sample Motor Drive Circuit
* When using Sanyo Electric’s LB1256 as the thermal head and motor drive IC, because of a
built-in motorstop circuit, a motor stop signal is not required.
M
Vcc
270Ω
300Ω
3kΩ
30kΩ2kΩ
IN
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2 - 9
2.4 TG (TACHO-GENERATOR) OUTPUT CHARACTERISTICS
The TG is a signal generator directly connected to the motor, that generates false
sine waves of two cycles per 1 turn of the motor. These waves are converted by a
waveform shaping circuit into rectangular wave signals, which are used as a pulse
impression timing signal for the thermal head.
(1) TG output
Table 2-3 TG Output
4 to 6V 5V
Output voltage (Vp-p) 2.0 to 7.0 3.5 to 6.0
Period (ms) 2.5 to 6.5 3.0 to 5.0
(2) Sample TG waveform shaping circuit
Figure 2-4 Sample TG waveform shaping circuit
Timing signal
Vcc
180kΩ
180kΩ
560P
2SC1740R
1SS133
TG
Figure 2-5 TG Timing Signal
* Generation of the timing signals depends on the user.
TG signal
Timing signal
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2 - 10
2.5 HOME SWITCH
The home switch is a push-open type mechanical switch, which switches “OFF”
when the head is at the home position (left end). The switch has two functions. The
first is to detect the home position when the head stops there. Upon returning to
the home postion, the home switch switches from “ON” to “OFF”, and brakes are
applied to stop the motion of the print head.
The second function is it is used as reference point for starting the counting of the
print timing signals. As the head begins to move to the right from the home position,
the home switch switches from “OFF” to “ON”, at which point counting of the print
timing signal begins (TG signals after waveform shaping).
(1) Contact resistance
5 Ωmax. (measuring current: 50
µ
A)
(2) Current
1.0 mA max. (5.0 VDC)
(3) OFF-to-ON detection
Figure 2-6 OFF-to-ON Detection
100
µ
s
2ms
This swtich has the characteristics that the ON state exists for more than 100
µ
s
within 2 ms of when the home switch switches from OFF-to-ON. Do not detect the
switch until after 1-line has printed after detection of the first ON detection.
(4) ON-to-OFF detection
Figure 2-7 ON-to-OFF Detection
2ms
450
µ
s
This switch has the characteristics that the OFF state exists for more than 450
µ
s
within 2 ms of when the home switch switches from ON-to-OFF. Do not detect the
switch for 10 ms after detection of OFF.
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