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3-15

3.5.1 Structure of the Thermal Head (LTPF247)

Figure 3-9

shows the thermal head block diagram for the LTPF247.

Table 3-7

shows the relationship between DST blocks and activated heat elements.

Figure 3-9 Thermal Head Block Diagram (LTPF247)

DAT IN2

CLK

LATCH

DST2

DAT OUT2

Vdd

GND

Output driver

Latch register

Shift register

Heat elements

DOT448

DOT193

DOT192

DOT

Thermistor

Block 2

Block 1

DAT IN1

DAT OUT1

N.C. if not using DAT OUT

DST1

Summary of Contents for LTP F Series

Page 1: ...LTP F SERIES LINE THERMAL PRINTER MECHANISM TECHNICAL REFERENCE U00060419201 Seiko Instruments Inc...

Page 2: ...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...

Page 3: ...on with the name if information is different Chapter 1 Precautions describes safety design and operational precautions Read it thoroughly before designing so that you are able to use the product prope...

Page 4: ...iv...

Page 5: ...14 3 5 1 Structure of the Thermal Head LTPF247 3 15 3 5 2 Printed Position of the Data LTPF247 3 16 3 5 3 Thermal Head Electrical Characteristics LTPF247 3 17 3 5 4 Structure of the Thermal Head LTPF...

Page 6: ...THE PRINTER 6 1 6 1 1 Printer Mounting Dimensions 6 1 6 1 2 Recommended Screws 6 3 6 1 3 Precautions for Securing the Printer 6 3 6 2 LAYOUT OF PRINTER AND PAPER 6 4 6 3 WHERE TO MOUNT THE PAPER HOLDE...

Page 7: ...UTOCUTTER UNIT 9 1 9 1 1 Installation Method 9 2 9 1 2 Clearing a Paper Jam in the Autocutter 9 4 9 1 3 Consideration for Outer Case Design 9 5 9 1 4 Considerations for Using 9 7 9 1 5 Appearance of t...

Page 8: ...nsions 6 2 6 2 Layout of Printer and Paper 6 4 6 3 The Platen Unit Mounting Position 6 5 7 1 Appearance and Dimensions LTPF247 7 2 7 2 Appearance and Dimensions of the Platen Unit LTPF247 7 3 7 3 Appe...

Page 9: ...cal Characteristics LTPF347 3 20 3 10 Head Resistance Ranks 3 21 3 11 Head Voltage 3 22 3 12 Temperature and Corresponding Thermistor Resistance 3 27 3 13 Absolute Maximum Ratings of the Paper Detecto...

Page 10: ...x...

Page 11: ...e and fire Follow the method described in Section 3 6 7 to monitor the temperature of the thermal head to prevent overheating Turn the printer off immediately if any abnormal conditions occur z Preven...

Page 12: ...inal SG to FG through an approximately 1 M resistor z Keep the Vp power off while not printing in order to prevent the thermal head from being electrically corroded In addition design the printer so t...

Page 13: ...ss does not apply to the head connector Stress may cause printing problems resulting in damage to the thermal head z Always release the pressure of the thermal head when not using the printer for a lo...

Page 14: ...e platen z When or after printing or paper feed has been suspended if data is input or printing restarts paper feed may not be performed properly for several dot lines just after printing starts This...

Page 15: ...erted to protect the platen and thermal head z Do not hit or scratch the surface of the thermal head with any sharp or hard objects as it may damage the heat element z When the printer is not in use p...

Page 16: ...1 6 1 2 3 Precautions on Discarding When discarding used printers discard them according to the disposal regulations and rules of each respective district...

Page 17: ...ing paper with a detachable platen unit z High resolution printing A high density print head of 8 dots mm produces clear and precise printing z Long life 2 The mechanism is maintenance free device wit...

Page 18: ...2 2...

Page 19: ...atio 3 Max Rated Max Rated 100 10 4A 9 2A 14 8A 13 0A 50 5 2A 4 6A 7 4A 6 5A 25 2 6A 2 3A 3 7A 3 3A Current consumption used in driving the head Vp 2 12 5 1 3A 1 2A 1 9A 1 7A Motor drive Vp Head Logic...

Page 20: ...materials Paper feed force 0 98N 100 gf or more Paper hold force 0 98N 100 gf or more Dimensions excluding the lever and convex part width depth height 86 2 54 25 8 mm 110 2 54 25 8 mm Mass Approx 15...

Page 21: ...s a printable area due to a relation with the paper width When transmitting print data enter NUL data for data strings equivalent to 8 dots each on the right and left sides 432 Dots 54mm 0 125 mm 8 Do...

Page 22: ...area due to a relation with the paper width When transmitting print data enter NUL data for the data string equivalent to 32 dots each in right and left sides 576 Dots 72mm 0 125mm 32 Dots 32 Dots 640...

Page 23: ...ioration in print quality due to backlash of the paper feed system the motor should be rotated 16 steps in the reverse direction then 16 steps in the normal direction during initialization z During pa...

Page 24: ...ISTICS Table 3 2 General Motor Specifications Item Specification Type PM Drive method Bipolar chopper Excitation 2 2 phase Winding resistance per phase 16 phase 10 Rated voltage Vp 24 V 10 Set current...

Page 25: ...or Drive Circuit 1 Sample Drive Circuit A sample drive circuit for the motor is shown in Figure 3 5 Figure 3 5 Sample Drive Circuit Recommended motor driver Shin Kaden Kogyo MTD2007F Rated voltage Vp...

Page 26: ...rmal direction when the motor is excited in the order of step 1 step 2 step 3 step 4 step 1 step 2 Figure 3 6 Input Voltage Signals for the Sample Drive Circuit Table 3 3 Excitation Sequence Input Sig...

Page 27: ...o prevent the motor from heating Even when the step motor is not excited it maintains force to prevent the paper from sliding by a torque operation 3 Start step z To restart the motor from the stop st...

Page 28: ...step acceleration time 5 After accelerating up to the motor driving speed the motor is driven at constant speed The printer can print during acceleration The maximum printing speeds differ depending u...

Page 29: ...72 73 74 75 76 77 78 79 80 81 82 83 84 85 1033 1045 1056 1068 1079 1090 1102 1113 1124 1134 1145 1156 1166 1177 1187 1197 1207 1217 1227 1237 1247 1257 1267 1276 1286 1295 1305 1314 1323 1333 1342 135...

Page 30: ...nt Value LOW LOW Im Approx 275mA HIGH LOW Im LOW HIGH Im HIGH HIGH Im 0mA In each motor driving step when the motor step time Tm ms is over 2 5 ms drive the motor 4 10Im up to the time of Tm 2 5 ms an...

Page 31: ...ving When the motor is driven for a long time or motor drive is often performed repeatedly the motor heats up and may not be able to show necessary performance To avoid it when the motor was driven se...

Page 32: ...g into blocks for every 128 dots The divided printing is effective for a high print ratio printing because the peak current can be cut down with the reduction of the average print speed When printing...

Page 33: ...ws the relationship between DST blocks and activated heat elements Figure 3 9 Thermal Head Block Diagram LTPF247 DAT IN2 CLK LATCH DST2 DAT OUT2 TH TH Vdd GND Output driver Latch register Shift regist...

Page 34: ...data dots from No 193 to No 448 are printed as shown in Figure 3 10 For No 1 to No 8 of 192 data dots transferred from the DATA IN1 and No 441 to No 448 of 256 dots data transferred from the DATA IN2...

Page 35: ...A DAT input current Low IIL DAT VIL 0V 0 5 A High IIH DST 120 A DST input current Low IIL DST 2 0 A High IIH CLK 2 0 A CLK input current Low IIL CLK 2 0 A High IIH LAT 2 0 A LATCH input current Low I...

Page 36: ...ws the relationship between DST blocks and activated heat elements Figure 3 11 Thermal Head Block Diagram LTPF347 DAT IN2 CLK LATCH DST2 DAT OUT2 TH TH Vdd GND Output driver Latch register Shift regis...

Page 37: ...data dots from No 385 to No 640 are printed as shown in Figure 3 12 For No 1 to No 32 of 384 data dots transferred from the DATA IN1 and No 609 to No 640 of 256 data dots transferred from the DATA IN2...

Page 38: ...5 A DAT input current Low IIL DAT VIL 0V 0 5 A High IIH DST 120 A DST input current Low IIL DST 2 0 A High IIH CLK 2 0 A CLK input current Low IIL CLK 2 0 A High IIH LAT 2 0 A LATCH input current Low...

Page 39: ...tup DI thold LAT DST tsetup LAT tw LAT tsetup DST LATCH td DO DRIVE OUT t Do t Do Hi Active Figure 3 13 Timing Chart 3 5 8 Head Resistance The LTP F Series head resistance is as shown in Table 3 10 Ta...

Page 40: ...5 25 V 3 5 10 Peak Current Since the peak current maximum current may reach the values calculated using equation 1 when the thermal head is driven make sure that the allowable current for the cable ma...

Page 41: ...ction 3 6 5 Printing using too high of voltage or too long of pulse width may shorten the life of the thermal head 3 6 2 Calculation of the Applied Energy The applied energy should be according to the...

Page 42: ...is equal to the resistance of the wire used between the thermal head control connector and the power supply including the resistance of switching circuit of relay etc 3 6 4 Head Activation Pulse Term...

Page 43: ...storage coefficient is calculated with the manner as follows 1 Prepare the heat storage software counters for each block to simulate the heat storage a Heat storage due to the head activation The heat...

Page 44: ...X Resistance at operating temperature Tx C R25 30 k 5 25 C B 3950 K 2 TX Operating temperature C EXP A The Ath power of natural logarithm e 2 71828 Rating Operating temperature range 40 C to 125 C 1 1...

Page 45: ...ing Thermistor Resistance Temperature C Thermistor Resistance k 0 100 99 5 77 85 10 60 57 15 47 53 20 37 61 25 30 00 30 24 11 35 19 51 40 15 89 45 13 03 50 10 75 55 8 92 60 7 45 65 6 25 70 5 27 75 4 4...

Page 46: ...y z Detecting abnormal temperatures by hardware If the control unit CPU malfunctions the software for detecting abnormal temperatures may not function properly resulting in overheating of the thermal...

Page 47: ...ge to the thermal head or platen roller or shorten the life of the thermal head significantly 3 7 1 General Specifications Table 3 13 Absolute Maximum Ratings of the Paper Detector at 25 C Item Symbol...

Page 48: ...IC IF 10 mA VCE 5 V 150 A 600 A Leak current ILEAK IF 10 mA VCE 5 V 1 A Collector saturation voltage VCE sat IF 10 mA IC 5 A 0 5V Response time at rise tr 5 s Transfer characteristics Response time at...

Page 49: ...paper Otherwise the thermal head may be damaged or the life of the head may be shortened significantly Activate the thermal head when the platen unit is CLOSED by detecting the output from the platen...

Page 50: ...3 32...

Page 51: ...IP 28 Core number 28 Conductor type 0 1 0 8 Strip length 4 0 Conductor pitch P1 25 2 Motor connector and Detector connector MOLEX INC 51021 0900 9 MOLEX INC 53047 0910 straight type 53048 0910 right a...

Page 52: ...4 2 4 1 THERMAL HEAD CONTROL TERMINALS Figure 4 1 shows the terminal configuration of the thermal head control connector Figure 4 1 Thermal Head Control Terminals...

Page 53: ...GND GND 11 GND GND 12 DST1 Input Head print activation instruction signal 13 CLK Input Print data transfer synchronize signal 14 LATCH Input Print data latch memory 15 Vdd Logic power supply 5V 16 TH...

Page 54: ...ND GND 10 GND GND 11 GND GND 12 DST1 Input Head print activation instruction signal 13 CLK Input Print data transfer synchronize signal 14 LATCH Input Print data latch memory 15 Vdd Logic power supply...

Page 55: ...rol Terminal Assignments Terminal Number Signal Name Function 1 B Motor drive signal 2 A Motor drive signal 3 B Motor drive signal 4 A Motor drive signal 5 Vps LED anode Power supply side 6 PS Photo t...

Page 56: ...4 6...

Page 57: ...the remaining data in the DST2 side to the SHIFT REGISTER in the DST2 side of the thermal head 3 When the activation of DST1 is completed the print data transferred by 2 is latched in the LATCH REGIS...

Page 58: ...nting data and operational environment In this case hold the motor step until completion of printing Keep 0 1 msec or more for the pause time after head activation The print data in the First step can...

Page 59: ...HAPTER 6 HOUSING DESIGN GUIDE 6 1 SECURING THE PRINTER 6 1 1 Printer Mounting Dimensions As shown in Figure 6 1 secure the printer at four mounting holes a b c and d The indents 1 and 2 are for positi...

Page 60: ...6 2 Figure 6 1 Printer Mounting Dimensions Unit mm...

Page 61: ...ise or damage z Prevent excessive force or torsion when securing the printer z Mount the printer on the flat mounting face and use the printer in a place where vibration does not occur A rubber vibrat...

Page 62: ...as shown in Figure 6 2 according to the loading direction of the paper Figure 6 2 Layout of Printer and Paper The distance between the paper detector and the heat element is approximately 8 mm Paper d...

Page 63: ...and closed Design the mounting position of the revolving point on the platen unit for the outer case so that it is contained within the dimension tolerance shown in Figure 6 3 In some construction cas...

Page 64: ...rmation and malfunction of the lever 6 6 WHERE TO MOUNT THE PAPER CUTTER Design the layout of the autocutter so that it does not interfere with the paper feed The position for feeding out paper is sho...

Page 65: ...imensions of the LTPF247 Figure 7 2 shows the appearance and the external dimensions of the Platen Unit for the LTPF247 Figure 7 3 shows the appearance and the external dimensions of the LTPF347 Figur...

Page 66: ...7 2 Figure 7 1 Appearance and Dimensions LTPF247 Unit mm General tolerance 0 2...

Page 67: ...7 3 Figure 7 2 Appearance and Dimensions of the Platen Unit LTPF247 Unit mm General tolerance 0 2...

Page 68: ...7 4 Figure 7 3 Appearance and Dimensions LTPF347 Unit mm General tolerance 0 2...

Page 69: ...7 5 Figure 7 4 Appearance and Dimensions of the Platen Unit LTPF347 Unit mm General tolerance 0 2...

Page 70: ...7 6...

Page 71: ...LOADING UNLOADING PAPER PRECAUTIONS 1 Loading paper z Turn over the release lever to the direction of the arrow in the Figure 8 1 Figure 8 1 Loading Paper 1 z Pull up the platen after making sure tha...

Page 72: ...e that the paper is set straight Close state Figure 8 2 Loading Paper 2 z When the platen is closed the gear A and the gear B come together See Figure 8 3 and the platen may stop In this case pull up...

Page 73: ...8 3 2 Unloading paper z Unload paper in the same manner for loading paper 3 Cleaning a paper jam z Unload the paper following manner for unloading the paper...

Page 74: ...damage the heat elements 8 2 2 Head Cleaning Procedure 1 Turn over the lever to the direction of the arrow in the Figure 8 4 Pull up the platen after making sure that the platen is released from the...

Page 75: ...Table 9 1 The ACU F Series paper cutter unit is a sliding type autocutter Please refer to the ACU F SERIES AUTOCUTTER UNIT TECHNICAL REFERENCE for the specifications and drive method Table 9 1 Printe...

Page 76: ...on the mechanism as shown in Figure 9 1 Recommended screws JIS 1188 pan head machine screw small round type M3 6 Be careful not to damage the thermal head during installation Figure 9 1 Installing th...

Page 77: ...after removing the protection tape 2 Mount the fixing blade unit to the autocutter unit with 2 screws Recommended screws JIS 1188 pan head machine screw small round type M2 4 Be careful not to damage...

Page 78: ...the upper surface of the autocutter Figure 9 4 1 turn the knob in the direction shown in Figure 9 4 2 until the entire hole of the warm wheel can be seen from the standby position confirmation window...

Page 79: ...ted into the paper outlet 4 Inappropriate positioning of the platen and the printer mechanisum may cause cutting failure and or paper jam Pay special attention when designing the outer case Refer to 6...

Page 80: ...9 6 Unit mm Figure 9 6 Outer Case Design Sample Mechanism Side...

Page 81: ...nd then cut the paper Print start position Cut position PRINT AREA A PRINT AREA B PRINT AREA A PRINT AREA B Execute a paper cutting after printing and the next PRINT AREA B PRINT AREA A The distance b...

Page 82: ...ance and external dimensions of the LTPF247 with the autocutter installed Figure 9 9 shows an appearance and external dimensions of the LTPF347 with the autocutter installed Figure 9 8 Appearance of t...

Page 83: ...9 9 Figure 9 9 Appearance of the Printer with the Autocutter Installed LTPF247 with ACUF224B Unit mm General tolerance 0 2...

Page 84: ...9 10 Figure 9 10 Appearance of the Printer with the Autocutter Installed LTPF347 with ACUF324A Unit mm General tolerance 0 2...

Page 85: ...9 11 Figure 9 11 Appearance of the Printer with the Autocutter Installed LTPF347 with ACUF324B Unit mm General tolerance 0 2...

Page 86: ...9 12...

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