Epson M-T123 Designer's Manual
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Epson M-T123 Designer's Manual

Epson M-T123 Designer's Manual

Thermal line printer
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Confidential
Thermal Line Printer
Copied Date
Copied by
SEIKO EPSON CORPORATION
MATSUMOTO MINAMI PLANT
2070 KOTOBUKI KOAKA, MATSUMOTO-SHI, NAGANO, 399-8702 JAPAN
PHONE+81-263-86-5353 FAX+81-263-86-9925
M-T123
Designer's Guide
STANDARD
Rev. No.
Notes
D

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Summary of Contents for Epson M-T123

  • Page 1 Confidential Thermal Line Printer M-T123 Designer’s Guide STANDARD Rev. No. Notes Copied Date Copied by SEIKO EPSON CORPORATION MATSUMOTO MINAMI PLANT 2070 KOTOBUKI KOAKA, MATSUMOTO-SHI, NAGANO, 399-8702 JAPAN PHONE+81-263-86-5353 FAX+81-263-86-9925...
  • Page 2 Sheet Rev. Sheet Rev. Sheet Rev. Enactment Akema Futatsugi Kumagai Change Akema Futatsugi Kumagai Change Akema Aoki Kumagai Change Akema Aoki Kumagai TITLE Front Part M-T123 Rev. General Table of Descriptions Cover Sheet Scope Contents Contents Appendix Total Designer’s Guide (STANDARD)
  • Page 3 3.2.1 Installing the platen unit 6) 7) 8) (added) 2.1, Motor Driving Frequency 1) To drive the motor, it is recommended to rush-drive … (corrected) Figure 3.1.1, [Units: mm] (added) Figure 3.2.3 (changed) Figure 3.3.1 (changed) Section 3.2.3 (added) TITLE M-T123 Designer’s Guide (STANDARD)
  • Page 4 2. On the earlier of (a) termination of your relationship with Seiko Epson, or (b) Seiko Epson's request, you must stop using the confidential information. You must then return or destroy the information, as directed by Seiko Epson.

  • Page 5: Table Of Contents

    3.2.2 Installation position for the platen unit................18 3.3 Designing the Platen Open Lever .....................19 3.3.1 Positioning the platen open lever ..................19 3.3.2 Movable area of the platen open lever................19 3.3.3 Example design for the platen open lever.................20 SHEET TITLE REVISION M-T123 Designer’s Guide NEXT SHEET (STANDARD)

  • Page 6: Circuit Design Reference

    Table 1.2.1 Motor Rotating Direction and Phase Signal Motor Signal Name Motor Drive Signal (input to Driver IC) Step ENA1 ENA2 Note: When ENA1 and ENA2 are LOW, all output signals from the Driver IC go off. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 7: Example Power Supply Connection Circuit For The Thermal Print Head

    4) If the capacitor C1 is installed, design the circuitry so that its charging voltage must go down to the ground level within 20 seconds after turning off the power to the print head. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET...

  • Page 8: Example Paper-End Signal Detection Circuit

    4) If a paper end is detected, printing is stopped. However, if a paper end is detected while printing, it is possible to print 15 dot lines or less (30 steps for the motor) from the position when a paper end is interpreted. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 9: Example Platen Open Signal Detection Circuit

    3) Energizing an unloaded print head for a long period may shorten its life. 4) Never drive the paper feed motor when the platen is unloaded (mechanical switch off). SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 10: Control Design Reference

    4) To avoid damage to the motor from high temperature, after the motor is driven continuously driven for t seconds, set a stopping period for over 3t seconds, where t is less than 60 seconds. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET...

  • Page 11: Energizing Print Head

    Table 2.2.1 shows an example print head energizing pulse width at each temperature. It is calculated based on the formulas described above as an energizing pulse width that meets the specifications. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)
  • Page 12 For SLT < (PLS + non-energizing period) The actual cycle time of energizing = PLS + non-energizing period 3. The problem of shading during printing can be caused by voltage fluctuation or some print patterns. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 13: Strobe Signal Partition

    Two partitions One partition 1st partition: 1st partition: 1st partition: 1st partition: 1st partition: 2nd partition: 2nd partition: 2nd partition: 2nd partition: 3rd partition: Figure 2.2.1 Example Strobe Signal Partition SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 14: Timing Chart

    Driving step 9 10 11 12 13 14 15 16 Motor A Motor B Motor A Motor B 1 step 5 ms 1 dot line Rush-drive 65 ms (Stop) Figure 2.3.1 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 15: Paper Feeding

    = 65 ms Slow-up s1 = 20 ms s2 = 10 ms  s12 = 1.27 ms Constant speed driving c = 1.25 ms Rush driving (stop) d = 65 ms SHEET TITLE REVISION EPSON M-T123 Designer’s Guide NEXT SHEET (STANDARD)

  • Page 16: Printing

    Motor B Motor A Motor B tc*: Chopping Data DI LATCH STB1 STB2 STB3 1 dot line 1 dot line 1 dot line 1 partition 2 partitions 3 partitions Figure 2.3.3 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)
  • Page 17 The setting example for energizing step 24 in the timing chart: Since the driving time for energizing step 23 is 1.705 ms, c5 for energizing step 24 is s8 (1.55 ms), according to Table 2.1.1. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 18: Keeping The Paper Paper Holding Load

    NOTE: The timing chart below describes only when the phase is shifted from printing to keeping the paper in paper holding load. Driving step Motor A Motor B Motor A Motor B Chopping Stop rush Constant speed drive T1=T2=0.3 ms Figure 2.3.4 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 19: Case Design Reference

    Clearance for the FCC Foot (1 mm from the bottom) Clearance for the gear (1 mm from the bottom) ↓ FCC side [Units: mm] Bottom of the printer Figure 3.1.1 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 20: Designing The Paper Roll Insertion Part

    The paper roll supply load must be less than 0.59 N {60 gf}. Max 60° Thermal paper Figure 3.1.2 3.1.3 Designing protection for the paper detector Design the case so that light from outside cannot strike the photo-reflective detectors. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 21: Designing The Case For The Platen Unit

    For case A, by making a specific shape on the case, the platen unit can be moved in the direction of a. For case B, since the platen unit is fixed to the upper case, it is necessary to make clearance on the case side. Figure 3.2.1 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)
  • Page 22 ± 0.3 mm or less of tolerance in the forward or backward direction is allowable. If the tolerance exceeds ± 0.3 mm, the platen unit may not be inserted smoothly into the main unit when the platen unit is loaded. SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 23: Installation Position For The Platen Unit

    The case should be designed so that the unshut status of the platen is easily found. Pushing position of the platen cover (concave) Hook of the platen unit Figure 3.2.4 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 24: Designing The Platen Open Lever

    Lever position when the platen is open Max.4° Movable area of the lever Default position of the lever Lever position when unlocked Max.20° Movable area of the lever Figure 3.3.1 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

  • Page 25: Example Design For The Platen Open Lever

    Confidential 3.3.3 Example design for the platen open lever [Units: mm] Figure 3.3.2 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)
  • Page 26 Operation part Paper roll upper case Case of the printer’s main unit Platen’s axis Pushing up Releasing the lock Raising it up Figure 3.3.3 SHEET TITLE REVISION M-T123 EPSON Designer’s Guide NEXT SHEET (STANDARD)

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