Seiko SII LTP01-245-11 Use and care manual

LTP01-245-11/12/18
THERMAL PRINTER MECHANISM
TECHNICAL REFERENCE
U00129248807

LTP01-245-11/12/18 THERMAL PRINTER MECHANISM TECHNICAL REFERENCE
U00129248800 November 2012
U00129248801 January 2013
U00129248802 March 2013
U00129248803 April 2013
U00129248804 June 2013
U00129248805 November 2013
U00129248806 August 2014
U00129248807 July 2015
Copyright © 2012-2015 by Seiko Instruments Inc.
All rights reserved.
Seiko Instruments Inc. (hereinafter referred to as "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.
is a trademark of Seiko Instruments Inc.

PREFACE
This technical reference (hereinafter referred to as "manual") describes the specifications and basic operating
procedures for the LTP01-245-11/12/18 thermal printer mechanism (hereinafter referred to as "printer").
The printer has the following models.
LTP01-245-11
LTP01-245-12
LTP01-245-18
This manual usually describes information common to any printer unless otherwise specified.
If the information is different depending on model, specific model names are mentioned clearly.
Chapter 1 "Precautions" describes safety, design, and handling precautions. Read it thoroughly before
designing so that you are able to use the product properly.
SII has not investigated the intellectual property rights of the sample circuits included in this manual. Fully
investigate the intellectual property rights of these circuits before using.
It is possible to use the LTP01 series for replacing LTPZ245M-C384-E thermal printer mechanism (hereinafter
referred to as "LTPZ245M").
In this manual, the description of negative logic has an additional "/" in the beginning of the terminal name.
The input/output direction is described from the product side.
The printer complies with EU RoHS Directive (2011/65/EU)
The printer contains "Pb". The details are described below.
a particular free-cutting steel parts, a particular component in glass of the electronic parts
*: Lead-containing items listed above are exempt from RoHS (2011/65/EU).
PREFACE-1

Identifying the parts of the printer as follows.
The following describes identifying the parts of the LTP01-245-11, LTP01-245-12, and LTP01-245-18 as an
example of the LTP01-245-11. The figure of LTP01-245-12 and LTP01-245-18 illustrates only the differences
from LTP01-245-11.
Thermal head
Connecting terminals
Platen gear
Platen
Platen unit
Printer main body
Out-of-paper sensor
Motor
Platen position sensor
LTP01-245-12
LTP01-245-18
Printer mechanism
PREFACE-2

TOC-1
TABLE OF CONTENTS
CHAPTER1 PRECAUTIONS 1-1
1.1 SAFETY PRECAUTIONS......................................................................................1-2
1.2 DESIGN AND HANDLING PRECAUTIONS .........................................................1-3
1.2.1 Design Precautions.......................................................................................1-3
1.2.2 Handling Precautions....................................................................................1-5
1.2.3 Precautions on Discarding ............................................................................1-6
CHAPTER2 FEATURES 2-1
CHAPTER3 SPECIFICATIONS 3-1
3.1 GENERAL SPECIFICATIONS ..............................................................................3-1
3.2 PRINT CONFIGURATION.....................................................................................3-3
3.3 STEP MOTOR.......................................................................................................3-4
3.3.1 General Specifications ..................................................................................3-4
3.3.2 Sample Drive Circuit......................................................................................3-5
3.3.3 Excitation Sequence......................................................................................3-7
3.3.4 Motor Start/Stop Method...............................................................................3-8
3.3.5 Motor Drive Method.......................................................................................3-9
3.3.6 Motor Drive Precautions..............................................................................3-15
3.4 THERMAL HEAD ................................................................................................3-16
3.4.1 Structure of the Thermal Head....................................................................3-16
3.4.2 Print Position of the Data.............................................................................3-17
3.4.3 Electrical Characteristics of Thermal Head.................................................3-18
3.4.4 Timing Chart................................................................................................3-20
3.4.5 Thermal Head Heat Element Resistance....................................................3-20
3.4.6 Maximum Current Consumption .................................................................3-20
3.5 CONTROLLING THE ACTIVATION PULSE WIDTH FOR THERMAL HEAD....3-21
3.5.1 Calculation of Activation Pulse Width..........................................................3-21
3.5.2 Calculation of Printing Energy.....................................................................3-22
3.5.3 Adjustment of Thermal Head Resistance....................................................3-22
3.5.4 Adjustment of Thermal Head Drive Voltage................................................3-23
3.5.5 Setting of Activation Pause Time ................................................................3-23
3.5.6 Adjustment by Thermal Head Activation Cycle...........................................3-24
3.5.7 Calculation Sample for the Activation Pulse Width.....................................3-25
3.5.8 Temperature Characteristics of the Thermistor ..........................................3-26
3.5.9 Detecting Abnormal Temperature of the Thermal Head.............................3-28
3.6 PLATEN POSITION SENSOR............................................................................3-29
3.6.1 General Specifications ................................................................................3-29
3.6.2 Precautions for the Platen Position Sensor.................................................3-29
3.7 OUT-OF-PAPER SENSOR.................................................................................3-30
3.7.1 General
Specifications ................................................................................3-30

TOC-2
3.7.2 Precautions for the Out-of-Paper Sensor....................................................3-30
CHAPTER4 CONNECTING TERMINALS 4-1
4.1 RECOMMENDED CONNECTOR FOR EXTERNAL CIRCUITS..........................4-1
4.2 CONNECTING TERMINALS.................................................................................4-1
CHAPTER5 PRINT DRIVE METHOD 5-1
5.1 MOTOR AND THERMAL HEAD DRIVE METHOD ..............................................5-1
5.2 THERMAL HEAD DIVISION DRIVE METHOD.....................................................5-3
5.3 PRECAUTIONS FOR PRINT DRIVE....................................................................5-3
CHAPTER6 OUTER CASE DESIGN GUIDE 6-1
6.1 SECURING THE PRINTER MAIN BODY.............................................................6-1
6.1.1 How to Mount the Printer Main Body ............................................................6-1
6.1.2 Recommended Screws.................................................................................6-2
6.1.3 Precautions for Securing the Printer Main Body...........................................6-2
6.2 SECURING THE PLATEN UNIT
(RECOMMENDED SHAPE AND DIMENSIONS) .................................................6-3
6.2.1 Recommended Shape of the Platen Holder..................................................6-3
6.2.2 Dimensions for Positioning and Securing the Platen Holder ........................6-4
6.2.3 Precautions for Securing the Platen Holder..................................................6-5
6.3 LAYOUT OF THE PRINTER MECHANISM AND THE THERMAL PAPER .........6-6
6.4 WHERE TO MOUNT THE PAPER HOLDER .......................................................6-7
6.5 DESIGN THE PAPER OUTLET............................................................................6-8
6.5.1 Design the Shape of the Paper Outlet ..........................................................6-8
6.5.2 Mount the Paper Cutter.................................................................................6-9
6.6 HOW TO CONNECT A PAPER WINDER...........................................................6-10
6.6.1 Precautions for Connecting the Paper Winder............................................6-10
CHAPTER7 EXTERNAL DIMENSIONS 7-1
CHAPTER8 HANDLING METHOD 8-1
8.1 INSTALLING/UNINSTALLING THE THERMAL PAPER ......................................8-1
8.1.1 Procedures for Installing/Uninstalling the Thermal Paper.............................8-1
8.1.2 Precautions for Installing/Uninstalling the Thermal Paper............................8-2
8.2 CLEANING THE THERMAL HEAD.......................................................................8-2
8.2.1 Procedures for Cleaning the Thermal Head .................................................8-2
8.2.2 Precautions for Cleaning the Thermal Head.................................................8-3

TOC-3
FIGURES
Figure 3-1 Print Dot Pitch................................................................................................3-3
Figure 3-2 Print Area.......................................................................................................3-3
Figure 3-3 Sample Drive Circuit 1...................................................................................3-5
Figure 3-4 Sample Drive Circuit 2...................................................................................3-6
Figure 3-5 Input Voltage Waveforms for the Sample Drive Circuit.................................3-7
Figure 3-6 Motor Start/Stop Timing Chart.......................................................................3-8
Figure 3-7 Thermal Head Block Diagram......................................................................3-16
Figure 3-8 Transfer Data and Print Position..................................................................3-17
Figure 3-9 Thermal Head Drive Timing Chart...............................................................3-20
Figure 3-10 Time from the start of the preceding thermal head activation to the start of
the current thermal head activation (W')......................................................3-24
Figure 3-11 Temperature Characteristics of the Thermistor...........................................3-26
Figure 3-12 Sample External Circuit of the Platen Position Sensor................................3-29
Figure 3-13 Sample External Circuit of the Out-of-Paper Sensor...................................3-30
Figure 4-1 Connecting Terminals....................................................................................4-1
Figure 5-1 Timing Chart for Division Printing ..................................................................5-1
Figure 6-1 Dimensions for Positioning and Securing the Printer Main Body..................6-1
Figure 6-2 Dimensions for Positioning and Securing the Platen Unit.............................6-3
Figure 6-3 Dimensions to Mount the Platen Unit ............................................................6-4
Figure 6-4 Recommended Layout between the Printer Mechanism and
the Thermal Paper.........................................................................................6-6
Figure 6-5 Recommended Paper Holder Dimensions ....................................................6-7
Figure 6-6 Paper Path.....................................................................................................6-8
Figure 6-7 Blade Edge.....................................................................................................6-9
Figure 7-1 External Dimensions of the Platen Unit.........................................................7-1
Figure 7-2 External Dimensions of the Printer (LTP01-245-11/18).................................7-2
Figure 7-3 External Dimensions of the Printer (LTP01-245-12)......................................7-3
Figure 8-1 Shape of the Thermal Paper Edge................................................................8-1
Figure 8-2 Cleaning Position of the Thermal Head.........................................................8-3

TOC-4
TABLES
Table 3-1 General Specifications...................................................................................3-1
Table 3-2 General Specifications of the Step Motor......................................................3-4
Table 3-3 Excitation Sequence......................................................................................3-7
Table 3-4 Maximum Motor Drive Pulse Rate.................................................................3-9
Table 3-5 Maximum Motor Drive Pulse Rate (During auto-loading)..............................3-9
Table 3-6 Acceleration Steps.......................................................................................3-11
Table 3-7 Maximum Continuous Drive Time and Drive Ratio......................................3-12
Table 3-8 Maximum Continuous Drive Time (min) and Paper Feed Length (m) at
Temperature Rise 50°C...............................................................................3-13
Table 3-9 Maximum Continuous Drive Time and Drive Ratio
(When the Same Control as the LTPZ245M Is Used).................................3-13
Table 3-10 Maximum Drive Time (min) and Paper Feed Length (m) at Temperature
Rise 50°C (When the Same Control as the LTPZ245M Is Used)................3-14
Table 3-11 Maximum Drive Time (min) and Paper Feed Length (m) at Temperature
Rise 75°C (When the Same Control as the LTPZ245M Is Used)................3-14
Table 3-12 DST and Activated Heat Elements ..............................................................3-17
Table 3-13 Electrical Characteristics of Thermal Head (Vdd: 3.0 V to 3.6 V)................3-18
Table 3-14 Electrical Characteristics of Thermal Head (Vdd: 4.75 V to 5.25 V)............3-19
Table 3-15 Thermal Head Heat Element Resistance ....................................................3-20
Table 3-16 Standard Printing Energy and Temperature Coefficient..............................3-22
Table 3-17 Activation Pulse Width.................................................................................3-25
Table 3-18 Temperature Characteristics of the Thermistor...........................................3-27
Table 3-19 General Specifications of Platen Position Sensor .......................................3-29
Table 3-20 Out-of-Paper Sensor ...................................................................................3-30
Table 4-1 Recommended Connectors...........................................................................4-1
Table 4-2 Terminal Assignments of the Connecting Terminal.......................................4-2

CHAPTER 1
PRECAUTIONS
Read through this manual to design a product and to operate the printer properly. Pay special attention to the
precautions noted in each section for details. Information contained in this manual is subject to change
without notice.
For the latest information, contact our sales representative.
Sufficient evaluation and confirmation should be performed with the designed outer case mounted, to ensure
proper use of the printer.
SII shall not be liable for any and all claims, actions, lawsuits, demands, costs, liabilities, losses, damages
and/or expenses that are caused by improper handling of the printer, any use not contained in this manual or
that result from the outer case, unless such damages and/or loss originate from the printer itself.
SII makes no warrant that your products into which built the sample circuits included in this manual can work
properly and safe. You shall evaluate and confirm sufficiently that such products can work properly and safe,
and shall be liable for any and all claims, actions, lawsuits, demands, costs, liabilities, losses, damages and/or
expenses arising out of or in relating to such products.
SII has not investigated the intellectual property rights of the sample circuits included in this manual. Fully
investigate the intellectual property rights of these circuits before using.
The printer is designed and manufactured to be mounted onto general electronic equipment. If high reliability
is required of the printer in respect to hazardous influences on the body or life and loss to property, redundant
design of the entire system should be carried out and verify the performance with your actual device before
commercialization. Our sales representative should be informed as such in advance.
Follow the precautions listed below when designing your product for using safely. Include any necessary
precautions into your operation manual to ensure safe operation of your product by users.
1-1

1.1 SAFETY PRECAUTIONS
Follow the precautions listed below when designing your product for using safely. Include any necessary
precautions into your operation manual and attach warning labels to your products to ensure safe operation.
Precautions to prevent the thermal head from overheating
When the thermal head heat elements are continuously activated by a CPU or other malfunction,
the thermal head may overheat and may cause smoke and fire. Follow the method described in
Chapter 3 "Detecting abnormal temperatures by hardware" to monitor the temperature of the
thermal head to prevent overheating. Turn the printer off immediately if any abnormal conditions
occur.
Precautions for rising temperatures of the thermal head
Temperature of the thermal head and its peripherals rises very high during and immediately after
printing. Be sure to design the outer case to prevent users from burn injuries by touching them.
Place warning labels to warn users to ensure safe operation. As for thermal head cleaning, warn
users to allow the thermal head to cool before cleaning. In order to allow cooling, secure clearance
between the thermal head and the outer case when designing the outer case.
Precautions for rising temperatures of the motor
Temperature of the motor and its peripherals rises very high during and immediately after printing.
Be sure to design the outer case to prevent users from burn injuries by touching them. Place
warning labels to warn users to ensure safe operation. In order to allow cooling, secure clearance
between the motor and the outer case when designing the outer case.
Precautions for sharp edges of the printer
The printer may have some sharp edges and cutting surfaces of the metal parts. Be sure to design
the outer case to prevent users from injuring himself/herself by touching the sharp edges and place
warning labels to warn users to ensure safe operation.
Precautions for motor drive
The hair may get caught in the exposed platen and the gears. Control the motor drive not to drive
when the outer case and the platen unit is in open state. Also, make sure to design the outer case so
as not to touch the platen and the gears and also prevent any objects from getting caught. Place
warning labels to warn users to ensure safe operation.
1-2

1.2 DESIGN AND HANDLING PRECAUTIONS
To maintain the primary performance of the printer and to prevent future problems from occurring, follow the
precautions below.
1.2.1 Design Precautions
Apply power in the following manner:
At power on : (1) Vdd →(2) Vp
At shut down : (1) Vp →(2) Vdd
A surge voltage between Vp and GND should not exceed 10V.
For noise countermeasure, connect a 0.1μF capacitor between Vdd and GND pins near the
connector.
Make the wire resistance between the power supply (Vp and GND) and the printer (connecting
terminals) as small as possible (below 50mΩ). Keep distance from signal lines to reduce electrical
interference.
The switch and the sensor may generate instantaneous abnormal signal. Design the firmware in
order to prevent malfunction due to the abnormal signal.
Keep the Vp power off during not printing in order to prevent the thermal head from electrolytic
corrosion. In addition, design the product so that the Signal Ground (GND) of the thermal head
and the Frame Ground (FG) of the printer become the same electric potential.
Use C-MOS IC chips for CLK, /LAT, DI and DST signals of the thermal head.
When turning the power on or off, or during not printing, always disable the DST.
To prevent the thermal head, out-of-paper sensor, motor, and platen detection switch from being
damaged by static electricity:
(1) Connect the printer Frame Ground (FG) connecting area to the Frame Ground (FG) of the outer
case. See Chapter 6 "OUTER CASE DESIGN GUIDE" for details.
(2) Connect the Signal Ground (GND) to the Frame Ground (FG) through approximately 1 MΩ
resistance.
Always detect the outputs of the platen position sensor and out-of-paper sensor. Never activate the
thermal head when the platen unit is in open state and when there is no thermal paper. Incorrect
activation of the thermal head may reduce the life of the thermal head and the platen and may
damage them.
A pause time between thermal head activations of the same heat element shall be secured more
than 0.5ms. Pay attention to when using one division printing or when a thermal head activation
time becomes longer. If activating for a long time without the pause time, the thermal head may
become damaged.
If too much energy is applied to the thermal head, it may overheat and become damaged. Always
use the printer with the specified amount of energy shown in Chapter 3 "CONTROLLING THE
ACTIVATION PULSE WIDTH FOR THERMAL HEAD".
Operation sound and vibration during printing vary depending on the motor pulse rate. Verify the
performance with your actual device.
Paper feed force can be decreased depending on the motor pulse rate. Verify the performance with
your actual device.
Do not perform continuous printing to prevent the motor from overheating. Refer to Chapter 3 "Motor
Drive Method" to set a pause time.
1-3

Paper feeding may be confused with several dot lines when printing is started from waiting status.
When printing and paper feeding are interrupted and then started printing, as this may cause the
paper feeding be confused. When printing bit images and so on, always feed the thermal paper for
more than 48 steps at start up and do not interrupt printing.
To prevent degradation in the print quality due to the backlash of the paper drive system, feed the
thermal paper for 48 steps or more at the initialization, at a time after setting/releasing the platen unit,
at a time after feeding the thermal paper backward, and a time after cutting with a paper cutter.
Surface of thermal paper may get scratched by backward feed. The backward feed may cause
paper skew and jams depending on paper roll layout and designing of paper holder. Be sure to
confirm performance with your product before using the backward feed.
If printing at a high print ratio for longer length, non-printing area may be colored due to an
accumulation of heat. Verify the performance with your actual device.
It is recommended that the door is guided by part of the outer case, when the platen unit is set into
the printer main body. If the rotation fulcrum of the rotation system of the door is configured to the
component mounting the printer main body, could design with high accuracy.
A door on the outer case that holds the platen unit must be set by pushing the center of the platen
unit. If only one end of the platen unit is set, a print defect, and/or a paper jam will occur. Verify the
performance with your actual device. In order to be pushed the center of the platen to set it, put an
indication to do so.
If the printer main body and the platen unit are not placed in proper position, the print defect and the
paper jam may occur. Therefore, pay special attention to it when designing the outer case.
For the position relation between the printer main body and the platen unit, see Chapter 6 "OUTER
CASE DESIGN GUIDE".
Design the rotation system of the door and the outer case strong enough to keep the allowable
dimensions because stress is applied to them when setting and releasing the platen unit. The
rotation center for the rotation system of the door should be designed to fit the rotational shaft into
the shaft hole so that the platen unit should be stable when it is in the close state.
Design the thermal paper supply system in accordance with Chapter 6 "OUTER CASE DESIGN
GUIDE". When the thermal paper supply position is improper, print difficulty or paper detection
difficulty will be caused and the surface of thermal paper may get scratched. Verify the performance
with your actual device.
Do not use labeling paper, 2-ply thermal paper, and the thermal paper with thickness of 75μm or
thicker.
Design the outer case so that a tension force is not applied to the FPC. The FPC could be moved by
setting/releasing the platen unit, so design the product so that the FPC has enough play after
connected it. The tension force may cause some print problems and may damage the FPC.
Metal parts may become discolored and rusted due to the operational environment. Consider these
factors regarding appearance.
Pressure or stress for direction where the platen unit is released should be applied only when the
platen unit is actually released. Permanent pressure or stress for releasing the platen unit may
cause slipping gears, negative influence on printing quality, and printing troubles during operation.
Contrary to the LTPZ245M, it is required to prevent overheating in the printer. See "3.3.6 Motor
Drive Precautions" for details.
1-4

1.2.2 Handling Precautions
Incorrect handling may reduce the efficiency of the printer and cause damage. Handle the printer with the
following precautions.
Also, include any necessary precautions so that users handle the printer with care.
Using anything other than the specified thermal paper does not guarantee print quality and life of the
thermal head.
The followings are examples of trouble:
(1) Poor printing quality due to low thermal sensitivity
(2) Abrasion of the thermal head due to the thermal paper surface roughness
(3) Printing stuck and unusual noise due to sticking the thermal layer of the thermal paper
to the thermal head
(4) Printing fade due to low preservability of the thermal paper
(5) Electrolytic corrosion of the thermal head due to inferior paper
After the printer has been left not in use for long period of time, the platen could be deformed and
resulted in print quality deteriorated. In this case, feed the thermal paper for a while to recover
deformation of the platen. If the thermal head is remained in contact with the platen without
thermal paper for a long time, the platen and the thermal head may be stuck together and cause
paper feed difficulty. If facing this problem, release the platen unit, and set it back again before
starting printing.
Never loosen the screws that fasten respective parts of the printer. Loosened screws may reduce
the efficiency of the performance of the printer mechanism.
Do not release the platen unit during printing; otherwise this may reduce the efficiency of the printer
and may cause damage.
Do not apply stress to the platen unit during printing. The print defect may occur.
When setting the platen unit, the reduction gear may interfere with the platen gear and may cause
the platen unit to not be set. In such a case, release the platen unit and set it again.
Never pull out the thermal paper while the platen unit is set. The printer mechanism may become
damaged.
When handling the printer, make sure to use antistatic clothing and to ground yourself to prevent the
electronic parts such as thermal head, out-of-paper sensor, motor, and platen detection switch from
damaged by static electricity. Especially take care of the thermal head heat element and the
connecting terminal.
Do not hit or scratch the surface of the thermal head with any sharp or hard object. This could
damage the thermal head.
When printing at a high print ratio in a low temperature or high humidity environment, the vapor from
the thermal paper during printing may cause condensation to form on the printer and soil the thermal
paper itself. Prevent the thermal head from a drop of water. It may cause electrolytic corrosion of
the thermal head. If condensed, do not activate electricity until dried.
Connect or disconnect the connecting terminal after turn off the power.
Do not apply stress to the FPC while connecting and disconnecting them. Otherwise the FPC may
become damaged.
Warn users not to pull the thermal paper and not to change the paper eject angle during printing.
Otherwise, the paper jam or the cut failure may occur.
1-5

1-6
In order to prevent the electronic parts such as thermal head, out-of-paper sensor, motor, and platen
detection switch from damage and to avoid the print defect, warn users not to touch the thermal
head and the sensor directly when handling the printer like replacing the thermal paper.
Do not use the paper roll with glued end or folded end. In case of using such paper roll, replace to a
new one before the end of the paper roll is shown up.
The printer is not waterproof and drip proof. Prevent contact with water and do not operate with
wet hands as it may damage the printer or may cause a short circuit or fire.
The printer is not dust proof. Never use the printer in a dusty place, as it may damage the thermal
head and paper drive system.
Do not use the printer in corrosive gas and siloxane atmosphere as it may cause the contact failure.
1.2.3 Precautions on Discarding
When discarding used printers, discard them according to the disposal regulations and rules of each
respective district.
* : Refer to the manual for other information on precautions.

CHAPTER 2
FEATURES
The printer is a compact printer that adopts a thermal line dot printing method.
It has the following features:
High resolution printing
A high-density print head of 8 dots/mm produces clear and precise printing.
Compact and light weight
Dimensions : W69.8mm x D32.7mm x H15.3mm (LTP01-245-11, LTP01-245-18)
W70.3mm x D32.7mm x H15.3mm (LTP01-245-12)
Mass : Approx. 44 g
High print speed*
Maximum 75mm/s print is available.
Easy operation
Platen open mechanism provides easy paper installation.
Auto-loading function
Automatic insertion of the thermal paper is enabled by theAuto-loading function.
Maintenance Free
No cleaning and no maintenance required.
Low noise
Thermal printing technology realizes low-noise print.
Replaceability
Possible for full replacement from LTPZ245M.
: Print speed differs depending on working conditions.
2-1

3-1
CHAPTER 3
SPECIFICATIONS
3.1 GENERAL SPECIFICATIONS
Table 3-1 lists the general specifications of the printer.
Table 3-1 General Specifications
(1/2)
Specifications
Items
LTP01-245-11/18 LTP01-245-12
Printing method Thermal dot line printing
Total dots per line 384 dots
Printable dots per line 384 dots
Simultaneously activated dots 64 dots max.
Resolution W 8 dots/mm × H 16 dots/mm
Paper feed pitch 0.03125 mm
Maximum print speed 75 mm/s*1
Print width 48 mm
Paper width 0
1-
58 mm
Thermal head temperature detection Thermistor
Platen position detection None Mechanical switch
Out-of-paper detection Reflection type photo interrupter
Operating voltage range
Vp line
Vdd line
4.75 V to 9.5 V
3.0 V to 3.6 V, or 4.75 V to 5.25 V
Current consumption
Vp line Thermal head drive
Motor drive
Vdd line Thermal head logic
3.76 A max. (at 9.5 V) *2
0.65 A max.
0.1 A max.

3-2
(2/2)
Specifications
Items
LTP01-245-11/18 LTP01-245-12
Operating temperature range 0°C to 50°C (Non condensing)
Operating humidity range
Temperature(℃）
Relative Humidity（%RH）
50℃52%RH
45℃64%RH
40℃85%RH
0 10 20 30 40 50
100
90
80
70
60
50
40
30
20
10
0
Storage temperature range -25°C to 60°C (Non condensing)
Activation pulse
resistance 100 million pulses or more*3
Life span
(at 25°C and
rated energy) Abrasion
resistance 50 km or more*4
Paper feed force 0.49 N (50 gf) or more
Paper hold force 0.78 N (80 gf) or more
Dimensions*5 W 69.8 mm × D 32.7 mm × H 15.3 mm W 70.3 mm × D 32.7 mm × H 15.3mm
Mass Approx. 44 g
Specified thermal paper
Nippon Paper TF50KS-E2D
Oji Paper Co., Ltd. PD150R
PD160R-N
Papierfabrik August Koehler AG KT55F20
Mitsubishi Paper mills limited F220VP
Jujo Thermal AF50KS-E
AP50KS-FZ
Mitsubishi Hi-Tech Paper F5041
KSP P300
*1 : Print speed changes according to the processing speed of the controller and print pulse width of the thermal head.
*2 : The value when the number of simultaneously activated dots is 64 dots.
*3 : Excluded when the same dots are printed continuously.
*4 : Excluding damage caused by dust and foreign materials.
*5 : Excluded convex part.

3-3
3.2 PRINT CONFIGURATION
Figure 3-1 shows print dot pitch. Figure 3-2 shows print area.
48mm（384dot）
0.125mm 0.125mm
0.0625mm
Figure 3-1 Print Dot Pitch
58
0
-1
mm(Paper width )
5mm 48 mm(Printing width) 5mm
Figure 3-2 Print Area

3-4
3.3 STEP MOTOR
3.3.1 General Specifications
Table 3-2 shows general specifications of the step motor.
Table 3-2 General Specifications of the Step Motor
Item Specifications
Type PM type step motor
Drive method Bi-polar chopper
Excitation 1-2 phase
Winding resistance per phase 10.5 /phase 10%
Motor drive voltage Vp : 4.75 V to 9.5 V
Motor controlled current 325 mA/phase*1（450 mA/phase*2）
Drive pulse rate 2400 pps max.
*1: During paper feeding/print.
*2: During auto-loading the thermal paper.
See "3.3.5 Motor Drive Method" for how to set the motor controlled current.

3-5
3.3.2 Sample Drive Circuit
(a) Motor current control with VREF signal
Figure 3-3 is a sample drive circuit when motor driver VREF signal (1.0V output) and resistance
voltage division are used to perform the motor current control. It is not possible to use this sample
circuit when auto-loading is used because the motor current switching control is required.
Drive Condition Motor Controlled Current
(Fixed)
VLIM Terminal Input
Voltage
Paper feeding/Printing 325 mA 161 mV to 167 mV
Prin te r Co n n ect i n g
Term i n als
PH1
PH2
PH3
PH4
MCL1
BD6380EFV
IN1A OUT1A
IN2A OUT2A
IN1B OUT1B
IN2B OUT2B
PS
VREF RNF1
SEN SE1
VLIM 1
VLIM 2 RN F2
SEN SE2
CR1 CR2
NC NC
14
10
+
47μF
25V
Vp
4
18
2
47kΩ
FUSE
1A
15
11
19
7
6
24
1
Vd d
16
9
23
3
520
12 0.5Ω 1%
0.125W
21
13 0.5Ω 1%
0.125W
18kΩ 18kΩ
680pF 680pF
22
27
29
28
30
A
B
/A
/B
0.1μF
817
13.0kΩ±1%
2.55kΩ±1%
0.1μF
Vd d
GND
VM 1
VM 2
* : Recommended motor driver : BD6380EFV(Rohm)
Figure 3-3 Sample Drive Circuit 1