Seiko LTP1245R-C384-E Especificações

LTP1245X-X384-E LINE THERMAL PRINTER MECHANISM TECHNICAL REFERENCE U00085320001 Seiko Instruments Inc.

1-2 1.2 DESIGN AND HANDLING PRECAUTIONS To maintain the initial level of performance of the LTP1245 and to prevent future problems from occurring,

1-3  Design the outer case so that the thermal head control terminals can move after fixing to the connector because they move 2 to 3 mm due to the

1-4  Connect or remove the connectors after powering off the printer.  When printing at a high print rate (black or zigzag pattern) in a low tem

2-1 2 FEATURES The LTP1245 Line Thermal Printer Mechanism is a compact, high-speed thermal line dot printing mechanism. It can b

2-2  Automatic paper load The paper detector enables the LTP1245 to load paper automatically.  Paper feed knob 2 The paper feed knob fo

3-1 3 SPECIFICATIONS 3.1 GENERAL SPECIFICATIONS Table 3-1 General Specifications Item Specification Print method Thermal dot line

3-2Table 3-1 General Specifications (Continued) Item Specification Operating temperature range (No codensation) -30°C to 70°C 4 Storage temperatu

3-3 3.2 HEAT ELEMENT DIMENSIONS The LTP1245 contains a thermal head with 384 heat elements (dot-size). Figure 3-1 Heat Element Dimensions

3-4 3.3 PAPER FEED CHARACTERISTICS  Paper is fed in a forward direction when the motor shaft is rotating in the normal direction (clockwise)

3-5 3.4 STEP MOTOR CHARACTERISTICS Table 3-3 General Motor Specifications Item Specification Type PM Number of phases 4-phase Drive met

LTP1245X-X384-E LINE THERMAL PRINTER MECHANISM TECHNICAL REFERENCE Document Number U00085320001 First Edition December 2003 Second Edition March

3-6 3.4.1 Motor Drive Circuit (1) Sample Drive Circuit Sample drive circuit for the motor are shown in Figure 3-3. 19 4 5 3.3KΩ 1% 2.7KΩ

3-7 (2) Excitation Sequence As shown in Table 3-4, the LTP1245 feeds paper in the normal direction when the motor is excited in the order of step 1

3-8 3.4.2 Motor Timing Refer to the timing chart in Figures 3-5 and 3-6 when designing the control circuit or software for starting and stopping th

3-9 (4) Others  Do not print paper at the intermittent feed mode. Doing so may deteriorate the printing quality due to irregular paper feeding p

3-10 3.4.3 Precautions for Driving the Motor (1) Motor Current Control Low speed motor driving while printing due to a division drive method,

3-11 In use at temperature below -5°C PH1 PH2 PH3 PH4 CTCRL1 Start (5.78ms) 1st step (5.78ms) 2nd step (3.57ms) Max speed=300pps 3rd step (3.33ms)

3-12 (2) Acceleration Control When driving the motor, acceleration control is needed to start paper feeding. When the motor is to be driven at the

3-13 Table 3-5 Acceleration Steps Number of Steps Speed (pps) Step Time (µs) start 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 173 280 362 432

3-14 3.5 THERMAL HEAD 3.5.1 Structure of the Thermal Head As Figure 3-8 shows, the LTP1245 thermal head consists of 384 heat elements, an

3-15 DATCLKLATCHDST6DST5DST2DST1THVddGNDVpShift RegisterLatch RegisterOutput DriverHeat ElementDOT 384DOT 321DOT 320DOT 257DOT 256DOT 129DOT 128DOT

iii PREFACE This reference manual describes the specifications and basic operating procedures for the LTP1245 (for RoHS) Line Thermal Printer

3-16Table 3-6 Blocks and Activated Heat Elements Block Number Heat Element Number Dots / Block 1 1 - 64 64 2 65 - 128 64 3 129 - 192 64 4

3-17 3.5.3 Head Resistance The LTP1245 head resistance is176 Ω ± 4 %. 3.5.4 Head Voltage The LTP1245 has a built-in head driver IC and

3-18 3.5.6 Thermal Head Electrical Characteristics Table 3-8 Thermal Head Electrical Characteristics (Vdd=4.5 to 5.5V, Ta=0 to 50°C) Rated Item

3-19 3.5.7 Timing Chart Figure 3-10 Timing Chart

3-20 3.6 CONTROLLING THE HEAD ACTIVATION (DST) PULSE WIDTH 3.6.1 Calculation of Head Activation Pulse Width Head activation pulse width i

3-21 3.6.3 Adjustment of Head Activation Voltage Adjustment of head activation pulse width due to changing the head activation volt

3-22 3.6.5 Determination of Activation Pause Time and Activation Pulse Period Dot lines may be activated in succession to the same th

3-23 3.6.7 Calculation Sample for the Head Activation Pulse Width Table 3-9 displays the calculation sample of the head activation pulse width th

3-24 3.6.8 Thermistor Resistance The resistance of the thermistor at the operating temperature TX (°C) is determined using the following equati

3-25 Table 3- 10 Temperature and Corresponding Thermistor Resistance Temperature (°°°°C) Thermistor Resistance (kΩΩΩΩ) Temperature (°°°°C) The

iv

3-26 3.6.10 Detecting Abnormal Temperatures of the Thermal Head To protect the thermal head and to ensure personal safety, abnormal thermal head t

3-27 3.7 HEAD-UP/PAPER DETECTOR LTP1245 has a built-in head-up detector to detect whether the head is up or down and a paper detector to detect wh

3-28 Table 3-13 Detectors Input / Output Conditions Item Symbol Conditions Std. Max. Forward voltage VF IF=10mA 1.15V 1.3V LED (input) R

3-29 3.7.3 Automatic Paper Load Paper can be automatically loaded when used in conjunction with the paper detector. To prevent paper from skewing

3-30 3.8 Mode Code Label Figure 3-14 shows that the printer is the LTP1245R-C384-E which is made in September 2004. See Figure 7-1 LTP1245R-C384-E

4-1 4 CONNECTING EXTERNAL CIRCUITS The LTP1245 has two types of connectors to connect it to the external circuits: FPC (Flexible Printed Ca

4-2 4.1 THERMAL HEAD CONTROL TERMINALS Figure 4-1 shows the FFC terminals of the thermal head control. 20 1 Figure 4-1 Thermal Head Control

4-3 4.2 MOTOR AND DETECTOR TERMINALS Figure 4-2 shows the FPC terminals of the motor control, paper detector and head-up detector. 91 Figure 4-

4-4

5-1 5 DRIVE METHOD 5.1 THERMAL HEAD DRIVE TIMING  Input of print data Input of DAT and CLK transfer the print data to the shift regis

v TABLE OF CONTENTS Section Page CHAPTER 1 PRECAUTIONS 1.1 SAFETY PRECAUTIONS ...

5-2 5.2 MOTOR DRIVE TIMING The phase of motors and the thermal head need to be synchronized to print. As example, the print method which divides o

5-3  2nd line, 1st step Drive the motor by one step (3rd step). As to how much step time is output, compare Tm with the time that was taken in the

5-4 Figure 5-2 Example of Motor Drive Timing Chart A B A B CLK DST 1,3,5 Block 2,4,6 Block 1,3,5 Block 2,4,6 Block DAT LATCH 2ND STEP OF THE 1ST

6-1 6 HOUSING DESIGN GUIDE 6.1 SECURING THE PRINTER The LTP1245 can be secured to the outer casing with screws. 6.1.1 Printer Mounting

6-2 6.2 LAYOUT OF PRINTER AND PAPER  Design the paper outlet angle in 0 to 45°. (See Figure 6-1) Figure 6-1 Paper Layout 6.3 WH

6-3 6.5 OUTER CASING STRUCTURE Figure 6-2 shows a sample structure for the outer casing. * Provide a gap of a few mm between the printer and

6-4

7-1 7 APPEARANCE AND DIMENSIONS Figure 7-1 shows the appearance and external dimensions of the LTP1245. CHAPTER

7-2 Figure 7-1 LTP1245R-C384-E Appearance and Dimensions Unit : mm Tolerance: ±0.5 mm

7-3 Figure 7-2 LTP1245S-C384-E Appearance and Dimensions Unit : mm Tolerance: ±0.5 mm

vi Section Page CHAPTER 4 CONNECTING EXTERNAL CIRCUITS 4.1 THERMAL HEAD CONTROL TERMINALS...

7-4 Figure 7-3 LTP1245T-S384-E Appearance and Dimensions Unit : mm Tolerance: ±0.5 mm

7-5 Figure 7-4 LTP1245U-S384-E Appearance and Dimensions Unit : mm Tolerance: ±0.5 mm

7-6

8-1 8 LOADING/UNLOADING PAPER AND HEAD CLEANING 8.1 LOADING/UNLOADING PAPER PRECAUTIONS ①①①① Loading paper  Load paper with the thermal

8-2 ③③③③ Auto-loading paper  Cut the edge of the paper so it is vertical to the direction of the paper feed.  Load paper with therm

8-3 8.2 HEAD CLEANING PROCEDURE AND PRECAUTIONS PROCEDURE : ① Lift the head up lever (a) so it stands upright (b). ② Clean the heat elements u

8-4

9-1 9 PERIPHERAL EQUIPMENT 9.1 AUTOCUTTER UNIT The LTP1245 can be equipped with the ACU6205 autocutter unit. The ACU6205 autocutter uni

9-2 9.1.1 Installation (1) When Using a Special Mount 1) Secure the printer on the special mount (OP-L1200-E) with the special screws. 2) Th

9-3 (2) When Designing a Mount Design a mount so that the fulcrum for rotation is located as shown in Figure 9-2. Fulcrum for rotation Figure

vii FIGURES Figure Page 3-1 Heat Element Dimensions... 3

9-4 9.1.3 Inserting Recording Paper (1) Automatic paper insertion Paper can be inserted automatically with the autocutter unit closed. See ③ in S

9-5 9.1.5 Hints for Use (1) Do not back feed paper after cutting paper using the autocutter unit because it will cause a paper jam. (2) To preve

9-6 9.1.6 External View when the LTP1245 is equipped with the Autocutter unit: mm Figure 9-6 External View when the LTP1245 is equipped with the A

9-7 9.2 LTP1245 MOUNT (OP-L1245A-E) The LTP1245 can be secured on the cabinet using the LTP1245 mount (OP-L1245A-E) and four screws.

9-8 9.2.2 OP-L1245A-E External View Figure 9-8 LTP1245 Mount External View (OP-L1245A-E) Unit:mm

viii TABLES Table Page 3-1 General Specifications .......

1-1 1 PRECAUTIONS Read through this manual to use the printer properly. Also, design the product taking the detailed precautions that are note