Seiko Instruments LTP F Series 用户手册

Section

Page

1.1

SAFETY PRECAUTIONS ..................................................................................................... 1-1

1.2

DESIGN AND HANDLING PRECAUTIONS ......................................................................... 1-2
1.2.1

Design Precautions .................................................................................................. 1-2

1.2.2

Handling Precautions ............................................................................................... 1-5

1.2.3

Precautions on Discarding ....................................................................................... 1-6

3.1

GENERAL SPECIFICATIONS .............................................................................................. 3-1

3.2

HEAT ELEMENT DIMENSIONS ........................................................................................... 3-3
3.2.1

Heat Element Dimensions for the LTPF247............................................................. 3-3

3.2.2

Heat Element Dimensions for the LTPF347............................................................. 3-4

3.3

PAPER FEED CHARACTERISTICS..................................................................................... 3-5

3.4

STEP MOTOR CHARACTERISTICS ................................................................................... 3-6
3.4.1

Motor Drive Circuit.................................................................................................... 3-7

3.4.2

Motor Timing ............................................................................................................ 3-9

3.4.3

Motor Driving Precautions ...................................................................................... 3-10

3.5

THERMAL HEAD ................................................................................................................ 3-14
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 (LTPF347)............................................................. 3-18

3.5.5

Printed Position of the Data (LTPF347) ................................................................. 3-19

3.5.6

Thermal Head Electrical Characteristics (LTPF347).............................................. 3-20

3.5.7

Timing Chart........................................................................................................... 3-21

3.5.8

Head Resistance .................................................................................................... 3-21

3.5.9

Head Voltage.......................................................................................................... 3-22

3.5.10 Peak Current .......................................................................................................... 3-22

3.6

CONTROLLING THE HEAD ACTIVATION (DST) PULSE WIDTH.................................... 3-23
3.6.1

Calculation of the Head Activation Pulse Width ..................................................... 3-23

3.6.2

Calculation of the Applied Energy .......................................................................... 3-23

3.6.3

Adjustment of the Head Resistance....................................................................... 3-24

3.6.4

Head Activation Pulse Term Coefficient................................................................. 3-24

3.6.5

Heat Storage Coefficient ........................................................................................ 3-25

3.6.6

Thermistor Resistance ........................................................................................... 3-26

3.6.7

Detecting Abnormal Temperatures of the Thermal Head ...................................... 3-28