Seiko LTPD247A Technical Reference
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Seiko LTPD247A Technical Reference

Thermal printer mechanism
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LTPD247A/B, LTPD347A/B
THERMAL PRINTER MECHANISM
TECHNICAL REFERENCE
U00113137700

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  • Page 1 LTPD247A/B, LTPD347A/B THERMAL PRINTER MECHANISM TECHNICAL REFERENCE U00113137700...
  • Page 2 Copyright © 2008 by Seiko Instruments Inc. All rights reserved. Seiko Instruments Inc. (hereinafter referred to as “SII”) has prepared this technical reference 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.
  • Page 3 PREFACE This technical reference describes the specifications and basic operating procedures for the LTPD247A/B and LTPD347A/B thermal printer mechanism (hereinafter referred to as “printer”). The LTPD247A/B and LTPD347A/B have the following model. • LTPD247A-432-E • LTPD247B-432-E • LTPD347A-576-E • LTPD347B-576-E This technical reference usually describes information common to any printer unless otherwise specified.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1 PRECAUTIONS SAFETY PRECAUTIONS ....................... 1-2 DESIGN AND HANDLING PRECAUTIONS ................... 1-3 1.2.1 Design Precautions ......................1-3 1.2.2 Handling Precautions ......................1-4 1.2.3 Precautions on Discarding ....................1-5 CHAPTER 2 FEATURES CHAPTER3 SPECIFICATIONS GENERAL SPECIFICATIONS ......................3-1 HEAT ELEMENT DIMENSIONS .....................
  • Page 5 CHAPTER4 CONNECTING TERMINALS RECOMMENDED CONNECTOR FOR EXTERNAL CIRCUITS ............ 4-1 CONNECTING TERMINALS ......................4-1 CHAPTER5 PRINT DRIVE METHOD MOTOR AND THERMAL HEAD DRIVE METHOD ................ 5-1 THERMAL HEAD DIVISION DRIVE METHOD................5-3 PRECAUTIONS FOR PRINT DRIVE....................5-4 CHAPTER6 OUTER CASE DESIGN GUIDE SECURING THE PRINTER MAIN BODY ..................
  • Page 6 TABLES Table 3-1 General Specifications....................3-1 Table 3-2 General Specifications of the Step Motor..............3-4 Table 3-3 Excitation Sequence....................3-6 Table 3-4 Acceleration Steps（LTPD247） ................3-10 Table 3-5 Acceleration Steps（LTPD347） ................3-12 Table 3-6 Maximum Drive Time and Drive Ratio..............3-14 Table 3-7 DST Blocks and Activated Heating Elements(LTPD247) ........
  • Page 7 Figure 5-2 Timing Chart for Driving Using One Division (LTPD247).......... 5-2 Figure 6-1 Dimensions for Positioning and Securing the Printer Main Body (LTPD247A) ..6-2 Figure 6-2 Dimensions for Positioning and Securing the Printer Main Body (LTPD247B) ..6-2 Figure 6-3 Dimensions for Positioning and Securing the Printer Main Body (LTPD347A) ..
  • Page 8 CHAPTER 1 PRECAUTIONS Read through this technical reference 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 technical reference is subject to change without notice. For the latest information, contact our sales representative.

  • Page 9: Safety Precautions

    1.1 SAFETY PRECAUTIONS Follow the precautions listed below when designing a product using the printer. 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.

  • Page 10: Design And Handling Precautions

    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) V →...
  • Page 11 • Do not feed the thermal paper backwards more than 9mm. 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.

  • Page 12: Handling Precautions

    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.

  • Page 13: Precautions On Discarding

    • 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. If use the printer in a dusty place, it may damage the thermal head or paper drive system.

  • Page 14: Features

    The printer has the following features: • High resolution Printing A high-density print head of 8 dots/mm produces clear and precise printing. • Compact LTPD247A: Dimensions : W71.0mm x D30.0mm x H15.0mm LTPD247B: Dimensions : W71.0mm x D15.0mm x H30.0mm LTPD247A/B: Mass : approx.

  • Page 15: Chapter3 Specifications

    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 LTPD247A LTPD247B LTPD347A LTPD347B Printing method Thermal dot line printing Total dots per line 432 dots 576 dots...
  • Page 16 (2/2) Specifications Items LTPD247A LTPD247B LTPD347A LTPD347B -10 to 50°C (Non condensing) 40℃85%RH 45℃64%RH 50℃52%RH Operating temperature and humidity range Temperature(℃） Storage temperature range -35 to75°C (Non condensing) Activation pulse 100 million pulses or more Life span resistance (at 25°C and...

  • Page 17: Heat Element Dimensions

    3.2 HEAT ELEMENT DIMENSIONS Figure 3-1 shows heat element dimensions. Figure 3-2 shows print area. Amm (B dots) 48mm (384dot) 0.125mm 0.125mm LTPD247 (A: 54, B: 432) LTPD347 (A: 72, B: 576) Figure 3-1 Heat Element Dimensions mm(Paper Width) D mm DOTBlo D mm 5 mm...

  • Page 18: Step Motor

    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 Specifications Item LTPD247 LTPD347 Type PM type step motor Drive method Bi-polar chopper Excitation 2-2 phase 26Ω/phase ±10% Winding resistance per phase Motor drive voltage : 21.6 to 26.4V...

  • Page 19: Sample Drive Circuit

    3.3.2 Sample Drive Circuit Figure 3-3 shows a sample drive circuit for LTPD247 and Figure 3-4 shows a sample drive circuit for LTPD347. FUSE TB6562AFG 4.7kΩ 4.7kΩ PHASEA 10μF PHASEB MCL1 VREG 0.1μF Printer Connecting 1500pF Terminals 5.1kΩ±1% VREFA OUT1A VREFB OUT2A 1.1kΩ±1%...

  • Page 20: Excitation Sequence

    3.3.3 Excitation Sequence Drive the motor with 2-2 phase excitation. One step of the motor drive signal feeds the paper 0.0625 mm. One dot line is consisted of 2 steps. When the voltage signal shown in Figure 3-5 is input to the motor drive circuit shown in Figure 3-3, the printer feeds the paper in the normal direction when the motor is excited in order of step 1, step 2, step 3, step 4, step 5, step 6, step7, step 8, step 1, step 2, .

  • Page 21: Motor Start/Stop Method

    3.3.4 Motor Start/Stop Method Refer to the timing chart in Figure 3-6 when designing the control circuit or software for starting and stopping the motor. Also note the following precautions: (1) Start step To start the motor from the pause (no excitation) state, shift the motor to the sequence of print step after exciting the same phase as that of the stop step for the first acceleration step time of the acceleration step.

  • Page 22: Motor Drive Method

    3.3.5 Motor Drive Method Drive the motor by the following methods. (1) Motor drive pulse rate During paper feeding, the motor should be driven equal or lower the following maximum motor drive pulse rate. LTPD247 Maximum motor drive pulse rate (P ) : 3200 pps LTPD347 Maximum motor drive pulse rate (P ) : 2400 pps...
  • Page 23 Find the number of row (an) to decelerate from current acceleration step number to next step by substituting the calculated acceleration step number into the following equation. "an" should be rounded off to an integer. Number of row to decelerate from current acceleration step number to next step Current acceleration step number (=Current acceleration step time) Acceleration step number at "n"th step ahead (=Acceleration step time at "n"th step ahead...

  • Page 24: Table 3-4 Acceleration Steps（Ltpd247

    Table 3-4 Acceleration Steps（LTPD247） (1/2) Number of Speed Step Time Number of Speed Step Time Steps (pps) (μs) Steps (pps) (μs) Start － 5000 1600 4805 1627 2970 1653 2293 1679 1925 1704 1688 1729 1519 1754 1392 1778 1291 1802 1209 1826...
  • Page 25 (2/2) Number of Speed Step Time Number of Speed Step Time Steps (pps) (μs) Steps (pps) (μs) 2268 2781 2287 2797 2306 2812 2325 2827 2343 2842 2361 2858 2380 2873 2398 2888 2416 2903 2433 2917 2451 2932 2469 2947 2486 2962...

  • Page 26: Table 3-5 Acceleration Steps（Ltpd347

    Table 3-5 Acceleration Steps（LTPD347） (1/2) Number of Number of Step Time Number of Speed Step Time Steps Steps (μs) Steps (pps) (μs) Start 6407 1200 6407 1220 3960 1240 3058 1259 2567 1278 2250 1297 2025 1316 1856 1334 1722 1352 1613 1370...
  • Page 27 (2/2) Number of Number of Step Time Number of Speed Step Time Steps Steps (μs) Steps (pps) (μs) 1701 2086 1715 2097 1729 2109 1743 2120 1757 2132 1771 2143 1785 2155 1798 2166 1812 2177 1825 2188 1838 2199 1851 2210 1864...

  • Page 28: Table 3-6 Maximum Drive Time And Drive Ratio

    (5) Preventing Overheat To prevent the motor from overheating, the drive time and drive ratio are limited. Follow the Table 3-6 shown below to set a drive time and a pause time of the motor. Table 3-6 Maximum Drive Time and Drive Ratio Maximum Motor drive voltage Vp (V) Drive pulse rate...

  • Page 29: Motor Drive Precautions

    3.3.6 Motor Drive Precautions • Using the motor drive circuit other than the circuit shown in "Section 3.3.2 Sample Drive Circuit" may not ensure the specified efficiency. • To prevent degradation in the print quality due to the backlash of the paper drive system, feed the paper for 24 steps or more at the initialization, at a time after setting/releasing the platen block, and a time after cutting with a paper cutter.

  • Page 30: Thermal Head

    3.4 THERMAL HEAD The thermal head consists of heat elements and a thermal head driver that drives and controls the heat elements. The printing data input the DI terminal is “High” at printing and “Low” at non printing. The data from the DI terminal is transferred to the shift register at the rising edge of the CLK signal. The data is stored into the latch register by making LAT signal "Low"...

  • Page 31: Print Position Of The Data

    Table 3-7 DST Blocks and Activated Heating Elements(LTPD247) Heating Element Block DST Number Dots/ DST Number DST1 1 to 144 DST2 145 to 288 DST3 289 to 432 Table 3-8 DST Blocks and Activated Heating Elements(LTPD347) Heating Element Block DST Number Dots/ DST Number DST1...

  • Page 32: Electrical Characteristics Of Thermal Head

    3.4.3 Electrical Characteristics of Thermal Head Table 3-9 and Table 3-10 show electrical characteristics of thermal head. Table 3-9 Electrical Characteristics of Thermal Head(LTPD247) (at 25 °C) Rated value Item Symbol Conditions Unit Thermal head 1455 1500 1545 Ω heat element resistance Thermal Head 21.6 24.0...

  • Page 33: Timing Chart

    Table 3-10 Electrical Characteristics of Thermal Head(LTPD347) (at 25 °C ) Rated value Item Symbol Conditions Unit Thermal head 1455 1500 1545 Ω heat element resistance Thermal Head 21.6 24.0 26.4 drive voltage Thermal Head at the number of simultaneously 5.23 drive current activated dots = 288...

  • Page 34: Figure 3-9 Thermal Head Drive Timing Chart

    3.4.4 Timing Chart Figure 3-9 shows a thermal head drive timing chart. Figure 3-9 Thermal Head Drive Timing Chart 3.4.5 Thermal Head Resistance Table 3-11 shows resistance of the thermal head of the printer. Table 3-11 Thermal Head Resistance Thermal Head Resistance 1455 to 1545Ω...

  • Page 35: Maximum Current Consumption

    3.4.6 Maximum Current Consumption Since the maximum current consumption may reach the values calculated using equation (1) when the thermal head is driven, the number of simultaneously activated dots should be determined not to exceed power supply capacity. Also, allowable current for the cable material and the voltage drop on the cable should be cared well.

  • Page 36: Controlling The Activation Pulse Width For Thermal Head

    3.5 CONTROLLING THE ACTIVATION PULSE WIDTH FOR THERMAL HEAD To execute high quality printing using the printer, the activation pulse width according to printer use condition must be used. Control printing with the activation pulse width calculated by the following sequence. Printing at too high voltage or too long activation pulse width may shorten the life of the thermal head.

  • Page 37: Calculation Of Printing Energy

    3.5.2 Calculation of Printing Energy The printing energy “E” can be calculated using equation (3) as the appropriate printing energy is different depending on each specified thermal paper and the temperature of the thermal head. Equation (3): × － － Standard printing energy See Table 3-12 or Table 3-13 Temperature coefficient...
  • Page 38 Table 3-13 Standard printing energy and Temperature coefficient (LTPD347) Standard Temperature coefficient Thermal paper printing energy (mJ) Less than 25°C 25°C or higher TF50KS-E2D 0.2998 0.003666 0.003666 Nippon Paper TP50KJ-R 0.4009 0.005592 0.005199 TL69KS-LH 0.4848 0.002960 0.004133 PD160R-63 0.3821 0.002577 0.004581 Oji Paper PD160R-N...

  • Page 39: Adjustment Of Thermal Head Resistance

    3.5.3 Adjustment of Thermal Head Resistance The adjusted resistance “R” can be calculated using equation (4) to adjust the thermal head resistance as a voltage drop is caused by wiring resistance. Equation (4): × ) Thermal head heat element resistance 1500 (Ω) Wiring resistance in the thermal head 40 (Ω)

  • Page 40: Adjustment By Thermal Head Activation Pulse Cycle

    3.5.6 Adjustment by Thermal Head Activation Pulse Cycle The thermal head activation pulse cycle coefficient “C” can be calculated using equations (7) as the printing density varies by the thermal head activation pulse cycle (equivalent for motor drive pulse rate). Equation (7): when 2 step driving cycle is lower than 2640(μs): ×...

  • Page 41: Calculation Sample For The Activation Pulse Width

    3.5.7 Calculation Sample for the Activation Pulse Width Table 3-14 lists the calculation samples of the activation pulse width calculated using equation (2) and the values obtained using equations (3) to (5) and (7). Table 3-14 Activation Pulse Width Unit:ms Motor drive pulse rate [pps] 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 ℃]...

  • Page 42: Temperature Characteristics Of Thermistor

    3.5.8 Temperature Characteristics of Thermistor Calculate the resistance of the thermistor (R ) at the operating temperature T (°C) using the following equation (8). Variation of resistance by temperature is shown in Figure 3-10 and Table 3-15. Equation (8): × ×...
  • Page 43 Table 3-15 Temperature Characteristics Thermistor Temperature (°C) Resistance (kΩ) 316.97 234.22 175.07 132.29 100.99 77.85 60.57 47.53 37.61 30.00 24.11 19.51 15.89 13.03 10.75 8.92 7.45 6.25 5.27 4.47 3.80 3.25 2.79 2.41 2.09 3-29...

  • Page 44: Detecting Abnormal Temperature Of The Thermal Head

    3.5.9 Detecting Abnormal Temperature of the Thermal Head To protect the thermal head and to ensure personal safety, abnormal temperature of the thermal head must be detected by both hardware and software as follows: (1) Detecting abnormal temperatures by software Design software that will deactivate the heat elements if the thermal head thermistor (TH) detects a ≦...

  • Page 45: Out-Of-Paper Sensor

    3.6 OUT-OF-PAPER SENSOR The printer has a built-in out-of-paper sensor (reflection type photo interrupter) to detect whether paper is present or not. An external control circuit should be designed so that it detects output from the out-of-paper sensor and does not activate the thermal head and motor when there is no paper. Doing not so may cause damage to the thermal head or platen roller or shorten the life of the thermal head significantly.

  • Page 46: Platen Position Sensor

    3.7 PLATEN POSITION SENSOR The printer has a built-in platen position sensor for detecting whether the platen block is set or released. This sensor is a mechanical switch which is designed to be on when the platen block is set and to be off when it is released.

  • Page 47: Chapter4 Connecting Terminals

    CHAPTER 4 CONNECTING TERMINALS 4.1 RECOMMENDED CONNECTOR FOR EXTERNAL CIRCUITS Use the recommended connectors listed in Table 4-1 to connect the printer connecting terminals firmly to the external circuits. Table 4-1 Recommended Connectors Number of Recommended Connectors Terminals MOLEX INC: 0541045031 (right angle type, top contact, gold plated) 4.2 CONNECTING TERMINALS Figure 4-1 shows the terminal configuration of the connecting terminals and Table 4-2 and Table 4-3 show...

  • Page 48: Table 4-2 Terminal Assignments Of The Connecting Terminal（Ltpd247

    Table 4-2 Terminal Assignments of the Connecting Terminal（LTPD247） （1/2） Terminal Signal Description Number Name Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Print data input (serial input) Synchronizing signal for print data transfer No connection...
  • Page 49 (2/2) Terminal Signal Description Number Name Print data latch (memory storage) signal Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply N.C.

  • Page 50: Table 4-3 Terminal Assignments Of The Connecting Terminal（Ltpd347

    Table 4-3 Terminal Assignments of the Connecting Terminal（LTPD347） （1/2） Terminal Signal Description Number Name Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Print data input (serial input) Synchronizing signal for print data transfer N.C.
  • Page 51 （2/2） Terminal Signal Description Number Name Print data latch (memory storage) signal Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply Thermal head drive power supply N.C.

  • Page 52: Chapter5 Print Drive Method

    CHAPTER 5 PRINT DRIVE METHOD 5.1 MOTOR AND THERMAL HEAD DRIVE METHOD The motor and the thermal head must be driven at the same time for printing. The example of the LTPD247 driving is shown below. Figure 5-1 shows a timing chart for driving using fixed two division printing. Figure 5-2 shows a timing chart for driving using one division printing.

  • Page 53: Figure 5-2 Timing Chart For Driving Using One Division (Ltpd247)

    1st dot line 1st dot line 2nd dot line 2nd dot line 3rd dot line 3rd dot line 4th dot line 4th dot line Pause Start 1st step 2nd step 1st step 2nd step 1st step 2nd step 1st step 2nd step MCL1 DST1...

  • Page 54: Thermal Head Division Drive Method

    5.2 THERMAL HEAD DIVISION DRIVE METHOD In the thermal head of the printer, there are 3 blocks (every 144 dots) in 1 dot line for LTPD247. There are 4 blocks (4 blocks are divided every 144 dots) in 1 dot line for LTPD347. These blocks are called physical blocks.

  • Page 55: Precautions For Print Drive

    5.3 PRECAUTIONS FOR PRINT DRIVE • When using one division printing, a pause time between thermal head activations of the same heat element shall be secured more than 0.1ms. • The number of the maximum thermal head division in one dot line should be 6 or lower for LTPD247 and 8 or lower for LTPD347 to maintain print quality.

  • Page 56: Chapter6 Outer Case Design Guide

    • Holes #1 to #3 must be used for positioning the printer main body. Design bosses on the outer case to position the printer main body for the positioning holes #1 and #2 (LTPD247A / LTPD347A) or #2 and #3 (LTPD247B / LTPD347B). The height of the bosses on the outer case must be 1.5mm (Max.) •...

  • Page 57: Figure 6-1 Dimensions For Positioning And Securing The Printer Main Body (Ltpd247A)

    30.75 ±0.5 29.65 ±0.5 Outer case for printer main body mounting Unit : mm General tolerance : ±0.1 Figure 6-1 Dimensions for Positioning and Securing the Printer Main Body (LTPD247A) 20.7 Paper Center 3.15 Clearance secured for the motor Max. 3.75 Min.

  • Page 58: Figure 6-3 Dimensions For Positioning And Securing The Printer Main Body (Ltpd347A)

    Paper center 19.15 29.75 ±0.5 51.65 ±0.5 Outer case for printer main body mouting Unit : mm General tolerance : ±0.1 Figure 6-3 Dimensions for Positioning and Securing the Printer Main Body (LTPD347A) Paper Center 14.15 Clearance secured for the motor Min.

  • Page 59: Recommended Screws

    6.1.2 Recommended Screws M2 cross-recessed pan head screw 6.1.3 Precautions for Securing the Printer Main Body • Prevent from excessive stress, deformation, and torsion for securing the printer, otherwise poor printing quality, paper skewing, paper jamming, and noise during printing may be caused. •...

  • Page 60: Securing The Platen Block

    6.2 SECURING THE PLATEN BLOCK 6.2.1 How to Mount the Platen Block Figure 6-5 shows the dimensions of an engagement position of the printer main body and platen block when setting or releasing the platen block mounted on the door. •...

  • Page 61: Recommended Screw

    6.2.2 Recommended Screw M2.5 cross-recessed pan head screw 6.2.3 Precautions for Securing the Platen Block • Design the door on which the platen block is mounted, rotation system of the door and mounting position of the platen block on the door so that X1, X2 and Y dimensions as shown in Figure 6-5 are within the allowable dimensions as shown in Table 6-1.

  • Page 62: Connect The Printer To Frame Ground (Fg)

    6.3 CONNECT THE PRINTER TO FRAME GROUND (FG) To prevent the thermal head from being damaged by static electricity, it is recommended that the printer mechanism is connected to frame ground (FG). Verify the performance with your actual device. 6.3.1 How to Connect the Printer to Frame Ground (FG) •...

  • Page 63: Design The Platen Release Lever

    6.4 DESIGN THE PLATEN RELEASE LEVER Figure 6-6 shows dimensions of the release lever and its movement when the platen release lever is released. When designing the button or the lever that will operate simultaneously with the platen release lever, follow the precautions below.

  • Page 64: Layout Of The Printer And Paper

    6.5 LAYOUT OF THE PRINTER AND PAPER The printer mechanism can be laid out as shown in Figure 6-7 according to the loading direction of the thermal paper. Platen Thermal head heat elements Thermal head Printer mechanism Paper roll Printer mounting plate Out-of-paper sensor Figure 6-7 Recommended Layout between the Printer and the Paper * The thermal paper feeding distance between the out-of-paper sensor and the heat element is approximately 8.3mm...

  • Page 65: Where To Mount The Paper Holder

    6.6 WHERE TO MOUNT THE PAPER HOLDER When designing the layout of the paper holder, note the followings. The recommended configuration of the paper holder is shown in Figure 6-8. • Design the paper holder and the paper guide so that the thermal paper will be straight to the paper inlet port without any horizontal shifting and so that the center axis of the paper roll will be parallel to the printer when using paper roll.

  • Page 66: Design Paper Exit

    6.7 DESIGN PAPER EXIT 6.7.1 Design the Shape of the Paper Exit When designing the shape of the paper exit, note the followings. • Design the shape of the paper exit so that stress is not applied to the thermal paper that comes out. •...

  • Page 67: Design The Paper Cutter

    6.7.2 Design the Paper Cutter • Design paper cutter mounting position so the edge of the cutter blade does not touch with a platen block when the platen block is set and released. • Use a well-cut cutter so that the thermal paper can be cut with less force than paper holding force. •...

  • Page 68: Precautions For Designing The Outer Case

    6.8 PRECAUTIONS FOR DESIGNING THE OUTER CASE • The thermal paper with a small winding diameter may cause the paper jam in the printer main body and a gap between the printer mechanism and the outer case. If using such a thermal paper with the small diameter, verify the performance with your actual device.

  • Page 69: Chapter7 External Dimensions

    Figure 7-1 shows external dimensions of the platen block for LTPD247 and Figure 7-2 and Figure 7-3 show external dimensions of the printer LTPD247A and LTPD247B. Figure 7-4 shows external dimensions of the platen block for LTPD347 and Figure 7-5 and Figure 7-6 show...

  • Page 70: Figure 7-1 External Dimensions Of The Platen Block (Ltpd247)

    2.1 ±0.05 (Range of platen motion) Unit : mm General tolerance : ± 0.5 Figure 7-1 External Dimensions of the Platen Block (LTPD247)

  • Page 71: Figure 7-2 External Dimensions Of The Printer (Ltpd247A)

    3.8 ±0.1 2.1 ±0.05 9.5 ±0.2 1.6 ±0.05 27.5 2.65 1.48 (Paper Inlet position) 37 ±3 39.95 38.7 0.8 ±0.04 4.54 M2 burring Unit : mm : ±0.5 General tolerance Figure 7-2 External Dimensions of the Printer (LTPD247A)

  • Page 72: Figure 7-3 External Dimensions Of The Printer (Ltpd247B)

    3.8 ±0.1 2.1 ±0.05 9.5 ±0.2 1.6 ±0.05 17.2 2.65 1.48 （Paper Inlet Position） 23.7 52 ±3 24.95 0.8 ±0.04 M2 burring Unit : mm : ±0.5 General tolerance Figure 7-3 External Dimensions of the Printer (LTPD247B)

  • Page 73: Figure 7-4 External Dimensions Of The Platen Block (Ltpd347)

    2.1 ±0.05 (Range of platen motion) Unit : mm : ±0.5 General tolerance Figure 7-4 External Dimensions of the Platen Block (LTPD347)

  • Page 74: Figure 7-5 External Dimensions Of The Printer (Ltpd347A)

    3.8 ±0.1 2.1 ±0.05 9.5 ±0.2 1.6 ±0.05 27.5 2.65 1.48 (Paper Inlet Position) 37 ±3 39.95 38.7 4.54 0.8 ±0.04 M2 burring Unit : mm : ±0.5 General tolerance Figure 7-5 External Dimensions of the Printer (LTPD347A)

  • Page 75: Figure 7-6 External Dimensions Of The Printer (Ltpd347B)

    3.8 ±0.1 2.1 ±0.05 9.5 ±0.2 1.6 ±0.05 17.2 2.65 1.48 (Paper Inlet Position） 52 ±3 23.7 24.95 0.8 ±0.04 M2 burring Unit : mm : ±0.5 General tolerance Figure 7-6 External Dimensions of the Printer (LTPD347B)

  • Page 76: Chapter8 Handling Method

    CHAPTER 8 HANDLING METHOD 8.1 PROCEDURES FOR INSTALLING/UNINSTALLING THE THERMAL PAPER 8.1.1 Procedures for Installing/Uninstalling the Thermal paper ① Installing the thermal paper • Push the platen release lever in the direction of the arrow in the Figure 8-1. Platen block Platen release lever Figure 8-1 Loading the Thermal Paper (1) •...

  • Page 77: Precautions For Installing The Thermal Paper

    Figure 8-2 Loading the Thermal Paper (2) • Set the platen block after making sure that the thermal paper is set straight. (Close state) ② Uninstall the thermal paper • Uninstall the thermal paper in the same manner for installing the thermal paper. ③...

  • Page 78: Precautions For Cleaning The Thermal Head

    8.2 PRECAUTIONS FOR CLEANING THE THERMAL HEAD If the surface of the thermal head exposed to dirt, ensure to clean the thermal head to avoid a print defect. 8.2.1 Procedures for Cleaning the Thermal Head • Turn off the power before cleaning. •...

This manual is also suitable for:

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