Confidential
micro dot printer
M-191
Specification
STANDARD
Rev. No.
D
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
Confidential
REVISION SHEET
Sheet 1 of 3
The table below indicates which pages in this specification have been revised.
Before reading this specification, be sure you have the correct version of each page.
Revisions
Rev.
Design Section
Document
Sheet Rev. No.
WRT
CHK
APL
Sheet Rev. Sheet Rev.
A
Enactment
Aoki
Asai
Ito
I
D
19
C
B
Change
Aoki
Asai
Ito
II
D
20
D
C
Change
Aoki
--
Kumagai
III
D
21
D
D
Change
Kamijo
Aoki
Kumagai
IV
D
22
D
23
D
24
D
TITLE
1
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D
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App. 1
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D
App. 2
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App. 3
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App. 4
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16
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17
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18
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Sheet
Rev.
Front Part
M-191
Specification
(STANDARD)
Cover
Rev.
Sheet
Scope
General
Description
Table of
Contents
Contents
Appendix
Total
1
3
--
3
1
32
4
44
Confidential
REVISION SHEET
Sheet 2 of 3
REV.
B
SHEET
19
C
All
III
4
5, 6
CHANGED CONTENTS
2.13 Timing Chart
Timing for paper feed operation
(corrected)
Approx. 50 ms (at 4.8 V) → Typ. 50 ms (at 4.8 V)
(clarified)
All pages are revised.
Reference for circuit design, Outer case design guide (moved to the M-191
designer’s guide)
External diagram for ribbon cassette (deleted)
Summary
1. Application (added)
3. Designer’s Guide, Developer’s Manual (added)
1.16 Environmental Conditions for Storage (added)
32
1.20 Insulation Resistance (added)
1.21 TSCA Compliance (added)
1.22 About Chemical Materials Included (added)
1.23 Factory Options (added)
2.1 Print Format → Print Structure
2) 5 x 7 Dot Matrix → Print format
Figure 2.1.3 NOTES (added)
3) Factory printing specifications (added)
2.2 Paper Feeding
NOTES: 2. (added)
2.3 Ribbon Cassette
• Refer to … (added)
2.4 Paper
3) Notes
c) Pre-print on the paper (added)
2.5 Timing Detector
Timing Pulse T → Timing signal T
2.7 Motor
NOTES (added)
4) Current (changed)
2.8 Print Solenoid
1) Number of solenoids (added)
2.10 Detection of Abnormal Conditions
b) When the Reset signal … (changed)
2.12 Terminal Assignments
Figure 2.12.1 (added)
2.13 Timing Chart
3) Initialization (added)
7) Notes (changed)
2.13 Overall Dimensions
Description of NOTES (changed)
2.14 (3) (added)
33
2.15 MCBF Confirmation Conditions
7-9
10
11
15
16
18
20
23
24
27 - 28
30, 31
App.1–4
(added)
3. APPENDIX (added)
TITLE
M-191
Specification
(STANDARD)
Confidential
REVISION SHEET
Sheet 3 of 3
REV.
D
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All
2,6,11,
32
CHANGED CONTENTS
All pages are revised.
Ribbon cassette ERC-40 (purple)
(deleted)
TITLE
M-191
Specification
(STANDARD)
Confidential
Points You Must Observe To Assure Product Safety
In order to assure the safe operation of this product, carefully observe the specifications as
well as the notes provided below.
Seiko Epson Corporation will not bear any responsibility for any damage or injuries arising
from use of this product that is not in accordance with the specifications and the notes
provided below.
Notes on Printer Control
1. Absolute maximum voltage
1) Printer voltage: DC 5.5 V or less
(Apply to the print solenoid, motor, fast paper feed trigger solenoid, and detectors.)
2. The conditions setting forth the maximum time power can be applied (and the maximum voltage that
can be applied) to electronic components such as the motor, and solenoids must be observed.
If the maximum time power can be applied (or the maximum voltage that can be applied) is exceeded,
the components mentioned above could overheat and start a fire or begin to smoke.
1) Motor
The motor is DC brush motors which can be short-circuited and must there fore be protected
using a fuse that is properly matched to the power supply.
2) Print Solenoid
Under any condition (including software runaway), the maximum power-on time may not
exceed 1 second.
3) Fast Trigger Solenoid
Under any condition (including software runaway), the maximum power-on time may not
exceed 5 seconds.
4) All Detectors
All detectors must protect the circuitry so that current never exceeds the maximum standard.
Notes on Handling
The case must be designed so that movable parts such as gears, etc., are not exposed.
Touching moving parts could cause a laceration or other injury.
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CONFIDENTIALITY AGREEMENT
BY USING THIS DOCUMENT, YOU AGREE TO ABIDE BY THE TERMS OF THIS AGREEMENT.
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MAKES NO OTHER WARRANTIES CONCERNING THE CONFIDENTIAL INFORMATION OR ANY
OTHER INFORMATION IN THE DOCUMENT, INCLUDING (WITHOUT LIMITATION) ANY
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not waive any right under this Agreement by failing to exercise it. The laws of Japan apply to this
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Cautions
1. This document shall apply only to the product(s) identified herein.
2. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or
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assumes no responsibility for errors or omissions.
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parties for damages, losses, costs, or expenses incurred by the purchaser or third parties as a result of:
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EPSON Approved Products by Seiko Epson Corporation.
Trademarks
EPSON® is a registered trademark of Seiko Epson Corporation.
General Notice: Other product and company names used herein are for identification purposes only and may
be trademarks of their respective companies.
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Summary
1. Application
This specification applies to the M-191.
2. Features
The M-191 is a mechanical dot printer with a print head consisting of 8 print solenoids arranged
in a horizontal line. The print head moves horizontally to print each dot line.
The print head which moves horizontal and performs uni-directional printing as each print
solenoid is energized in order.
Paper is automatically fed one pitch when the print head returns.
is obtained by repeating this operation.
The desired print format
The M-191 has the following features:
1. Clear print quality from the impact dot printing system.
2. Ultra compact (height: 15.8 mm {0.62"}), lightweight (100 g {0.22 lb}), and high reliability
(MCBF: 1,100,000 lines).
3. Can be driven using Ni-Cd batteries.
4. Low running cost is obtained by using normal paper and a long-life ribbon (ERC-22).
5. Possible to copy (Original 1 sheet + 1 copy sheet).
6. Fast paper feed and paper release mechanism.
7. Graphic characters can be printed.
8. An exclusive LSI chip can be used.
9. Various options are available. (See below.)
Item
Ribbon cassette
Specifications
ERC-09 (black)
ERC-22 (black)
Note
Life: Approximately
200,000 characters
Life: Approximately
600,000 characters
Manual feed knob
Horizontal type
Vertical type
Outside diameter: φ20mm
Outside diameter: φ22mm
3. Designer’s Guide, Developer’s Manual
Refer to the separate “M-191 Designer’s Guide” and “M-150/190/190G Developer’s Guide” together
with this specification.
4. Explanation of voltage indication
This specification identifies a usable voltage as “terminal voltage” (voltage between terminals on the
printer’s PCB). To set up the power supply voltage, consider the power supply voltage loss caused
by energizing the print solenoids and the voltage drop from driver and circuit lines so that the printer
can operate within the specified voltage range.
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Table of Contents
1. GENERAL SPECIFCATIONS ..............................................................................................................1
1.1 Printing Method..............................................................................................................................1
1.2 Printing Format ..............................................................................................................................1
1.3 Print Speed ....................................................................................................................................1
1.4 Character Size ...............................................................................................................................1
1.5 Coping Capability...........................................................................................................................1
1.6 Paper Specifications ......................................................................................................................1
1.7 Paper Feeding Specification..........................................................................................................1
1.8 Inking .............................................................................................................................................2
1.9 Motor..............................................................................................................................................2
1.10 Timing Detector ...........................................................................................................................2
1.11 Reset Detector.............................................................................................................................2
1.12 Print Solenoid ..............................................................................................................................2
1.13 Fast Paper Feeding Trigger Solenoid .........................................................................................2
1.14 Connection...................................................................................................................................2
1.15 Environmental Conditions............................................................................................................3
1.16 Environmental Conditions for Storage (paper, ribbon cassettes excluded) ................................4
1.17 Reliability .....................................................................................................................................5
1.18 Dimensions ..................................................................................................................................5
1.19 Mass ............................................................................................................................................5
1.20 Insulation Resistance ..................................................................................................................5
1.21 TSCA Compliance .......................................................................................................................5
1.22 About Chemical Materials Included .............................................................................................6
1.23 Factory Options ...........................................................................................................................6
2. DETAILED SPECIFICATIONS.............................................................................................................7
2.1 Print Specifications ........................................................................................................................7
2.2 Paper Feeding .............................................................................................................................10
2.3 Ribbon Cassette ..........................................................................................................................11
2.4 Paper ...........................................................................................................................................12
2.5 Timing Detector ...........................................................................................................................16
2.6 Reset Detector.............................................................................................................................17
2.7 Motor............................................................................................................................................18
2.8 Print Solenoids.............................................................................................................................20
2.9 Fast Paper Feed Trigger Solenoid ..............................................................................................22
2.10 Detection of Abnormal Printer Conditions .................................................................................23
2.11 Maximum Allowable Continuous Energizing Time ....................................................................23
2.12 Terminal Assignments ...............................................................................................................24
2.13 Timing Chart ..............................................................................................................................25
2.14 Overall Dimensions ...................................................................................................................30
2.15 Life / MCBF Confirmation Conditions ........................................................................................32
3. APPENDIX ................................................................................................................................... App.1
3.1 Matters Operators must Follow ............................................................................................. App.1
3.2 Notes on Handling the Printer ............................................................................................... App.3
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1. GENERAL SPECIFCATIONS
1.1 Printing Method
Impact Dot Matrix Printer (8 print solenoids)
1.2 Printing Format
1) Number of total dots:
2) Number of columns:
1.3 Print Speed
1) 1 line printing:
Max. 192 dots/dot line
Max. 32
(5 × 7 font + 1 dot column spacing)
(4 columns / print solenoid × 8 pcs.)
1.9 lps ± 15% (typical)
(5 × 7 font + 3-dot line spacing)
(Motor terminal voltage at DC 4.8 V constant, 25°C {77°F}, continuous
printing)
[lps: lines per second]
67 ms ± 15% (typical)
(Motor terminal voltage at DC 4.8 V constant, 25°C {77°F}, continuous
printing)
2) 1 dot line printing:
1.4 Character Size
1) Dot space :
Horizontal Approximately 0.25 mm {0.010"}
Vertical
Approximately 0.37 mm {0.015"}
Approximately 1.3 (W) × Approximately 2.6 (H) mm
{Approximately 0.067" (W) × Approximately 0.102" (H)}
2) 5 × 7 font:
1.5 Coping Capability
1 original + 1 copy
1.6 Paper Specifications
1) Paper type:
Single-ply paper roll or Two-ply pressure-sensitive paper
(Paper roll type or cut sheet type)
2) Size (single-ply paper roll) 57.5 ± 0.5 mm {2.26" ± 0.02"} (paper width)
× 83 mm {3.3"} (outside diameter)
*See 2.4 Printer Paper for details.
1.7 Paper Feeding Specification
1) Feeding method:
Friction method
Paper is automatically fed every dot line.
Possible to feed paper with a trigger solenoid for fast paper feeding.
With paper release mechanism
2) Paper feeding pitch:
During automatic paper feeding:
1-dot line pitch (approximately 0.37 mm {0.015"})
During fast feeding:
3-dot line pitch (approximately 1.11 mm {0.044"})
3) Fast paper feeding speed: 4.5 lps ± 15% (typical)
(Motor terminal voltage at DC 4.8 V, 25°C {77°F}, continuous
printing)
[lps: lines per second]
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1.8 Inking
1) Inking method:
2) Standardized goods:
Ribbon cassette
ERC-09, ERC-22
Ribbon is fed automatically during motor rotation.
1.9 Motor
1) Terminal Voltage:
DC 4.8 +0.7/–1.0 V (Ni-Cd battery, nominal voltage 4.8 V)
DC 4.8 +0.4/–1.0 V (When stabilized power supply is used)
Typical 0.35 A
(terminal voltage at DC 4.8 V, 25°C {77°F}, as measured with
an ammeter)
2) Mean Current:
1.10 Timing Detector
Tacho−generator (directly connected with motor)
1.11 Reset Detector
Reed-Switch
1.12 Print Solenoid
1) Terminal Voltage:
DC 4.8 +0.7/–1.5 V (Ni-Cd battery, normal voltage DC 4.8 V)
DC 4.8 +0.4/–1.5 V (When stabilized power supply is used)
NOTE: The print solenoid terminal voltage and motor terminal voltage
should satisfy the voltage relationship shown in Figure 2.8.1
1.3 ± 0.13 Ω (at 25°C {77°F})
2) DC Resistance:
1.13 Fast Paper Feeding Trigger Solenoid
1) Terminal Voltage:
DC 4.8 +0.7/–1.0 V (Ni-Cd battery, normal voltage 4.8 V)
DC 4.8 +0.4/–1.0 V (When stabilized power supply is used)
NOTE: Use the same power supply as that for the motor so that the
terminal voltages match.
2) DC resistance:
20 ± 2.0 Ω (at 25°C {77°F})
1.14 Connection
1) Printer side:
P.C. Board fixed to the frame (2.5 mm {0.098"} pitch copper plated
pattern)
2) Host side:
Flat cables or lead wires
∗ See 2.12 Terminal Assignments for details.
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1.15 Environmental Conditions
1) Operating ambient temperature: 0 to 50°C {32 to 122°F}
2) Operating ambient humidity:
10 to 90% RH (non-condensing)
NOTE: Temperature and humidity must meet the relationship shown in the following figure.
90
Relative humidity [%]
34°C {93°F}, 90%
40°C {104°F}, 64.9%
Operating range
35
50°C {122°F}, 35%
10
0
34
50
Environmental temperature [°C]
Figure 1.15.1
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1.16 Environmental Conditions for Storage (paper, ribbon cassettes excluded)
1) Storage at high temperatures and high humidity:
Temperature:
50°C {122°F}
Humidity:
90% RH
Total time:
240 hours
NOTE: EPSON confirmed that no unexpected conditions will occur in operation of the mechanism
at 25°C {77°F}, 60% RH after being left for two hours past storage in the above conditions.
2) Storage at high temperatures:
Temperature:
70°C {158°F}
Total time:
240 hours
NOTE: EPSON confirmed that no unexpected conditions will occur in operation of the mechanism
at 25°C {77°F} after being left for two hours past storage in the above conditions.
3) Storage at low temperatures:
Temperature:
-25°C {–13°F}
Total time:
240 hours
NOTE: Epson confirmed that no unexpected conditions will occur in operation of the mechanism
at 25°C {77°F} after being left for two hours past storage in the above conditions.
4) Vibration resistance:
Frequency:
Sweep:
10 - 150 - 10 Hz
20 minutes for coming and returning
(One hour for each direction)
Acceleration:
Approximately 19.8 m/s2 {2 G}
(X, Y, and Z directions)
Center of vibration:
Any mechanism installed part
NOTE: Epson confirmed that no unexpected conditions will occur in operation of the mechanism
after vibration under the above conditions.
Impact acceleration:
Approximately 980 m/s2 {100 G}
Total operation time:
6 ms
Direction:
3 times each for X, Y, and Z directions
Impact operation point: Any mechanism installed part
NOTE: Epson confirmed that no unexpected conditions will occur in operation of the mechanism
after impact under the above conditions.
6) Long storage:
Temperature:
5 - 35°C {41 - 95 °F}
Humidity:
40 - 70% RH
Storage period:
within 18 months from the date
manufactured
NOTE: After long storage, be sure to carry out a quality test to verify the printing quality.
5) Impact resistance:
NOTE: Refer to the specification for each ribbon cassette individually for the environmental
conditions for storage of usable ribbon cassettes.
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1.17 Reliability
1) MCBF
2) Printer life:
1,100,000 lines (includes the solenoids)
1,650,000 lines
NOTES: 1. Refer to Section 2.15 for the MCBF confirmation conditions.
2. When one of the following parts or units fails, the printer is considered to have reached
the end of its life. (Head unit, head cam unit, motor)
1.18 Dimensions
91 (W) × 46.9 (D) × 15.8 (H) mm (excludes the manual feed knob)
{3.58" (W) × 1.85" (D) × 0.62" (H)}
1.19 Mass
Approximately 100 g {0.22 lb} (excludes the ribbon cassette)
1.20 Insulation Resistance
10 MΩ or more at initial (DC 250 V)
Between PCB terminals and printer frame
1.21 TSCA Compliance
All the EPSON-specified ink, grease and oil materials used in this
product are listed in the TSCA chemical substance inventory of the
U.S. Toxic Substances Control Act.
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EPSON
M-191
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1.22 About Chemical Materials Included
The chemical materials contained in this product are managed based on Seiko Epson's policy and lists
of chemical substances banned in products (level 1 and 2) and controlled chemical substances set
forth in Green Purchasing Standard. As for the chemical substances banned in products (level 1 and
2) and controlled chemical substances, please refer to the following documents that are uploaded to
the Seiko Epson's homepage:
Homepage:
http://www.epson.co.jp/ecology/customer/green_cf.shtml (Japanese)
http://www.epson.co.jp/e/community/environmental_gpurchasing_2.htm (English)
Certification That Product Does Not Contain Banned Substances (level 1):
http://www.epson.co.jp/ecology/customer/green_p/seg_t_0102_j_20.pdf (Japanese)
http://www.epson.co.jp/ecology/customer/green_p/seg_t_0102_e_20.pdf (English)
http://www.epson.co.jp/ecology/customer/green_p/seg_t_0102_c20.pdf (Simplified Chinese)
Survey Tool for Substances to Be Eliminated From Products (level 2):
http://www.epson.co.jp/e/community/pdf/researchtool1_6_j.pdf (Japanese)
http://www.epson.co.jp/e/community/pdf/EliminationToolRev1_6.pdf (English)
SEG Green Purchasing Standard for Production Material:
http://www.epson.co.jp/e/community/pdf/gps_j.pdf (Japanese)
http://www.epson.co.jp/e/community/pdf/gps_e.pdf (English)
http://www.epson.co.jp/e/community/pdf/gps_c.pdf (Simplified Chinese)
1.23 Factory Options
1) Manual feed knob
Horizontal type, Outside diameter: 20 mm {0.79"}
Vertical type, Outside diameter:
22 mm {0.87"}
ERC-09, ERC-22
2) Ribbon cassette
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2. DETAILED SPECIFICATIONS
2.1 Print Structure
1) Print area
The print head consists of 8 print solenoids (A, B, C, D, E, F, G, and H) arranged in a horizontal line.
The print head moves from the left (from the standby position) to the right, printing at 24 positions as
each print solenoid is energized, so that one dot line is formed. The total number of dots per dot
line is 192 (24 positions × 8 solenoids).
Paper feed direction
Print solenoid
A
B
C
D
24dots 24dots 24dots 24dots
5.2 +2.2/-2.8 mm
E
F
G
H
24dots 24dots 24dots 24dots
Print area 24 × 8 = 192 dots
(47.8 mm)
Center of dot
57.5 ± 0.5 mm (Paper width)
Conditions: Room temperature and normal humidity. When paper is fed under normal
conditions, the paper edge should be not fold.
Figure 2.1.1
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2) Print format (5 × 7 font with 1 dot for column space and 3 dots for line space)
24 positions are divided by four. Out of 6 dots, 5 dots are used for printing and 1 dot for column
space. By repeating this 7 times in the vertical direction (paper feed direction), a 5 × 7 font of 32
columns (4 columns × 8 solenoids) can be obtained.
(5 + 1) × 32 = 192 dot/1 dot line
Column 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
a
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
c
b
c
5 positions
Print solenoid A
B
C
D
E
F
G
H
Figure 2.1.2
3.7
NOTE:
1) The values shown in Figure 2.1.3 are design
values. Therefore, dot blur is not considered.
2)
(1.18)
(2.52)
0.37
0.25
1.3
P=0.2 (When printed with the
same print solenoid)
P=0.17 (When including value b)
P=0.25 (When including value c)
P
- Dot intervals with the same print solenoid
a =0.25 mm
1.3
(Unit: mm)
Figure 2.1.3
TITLE
EPSON
Since dot intervals printed by each print solenoid
may vary as follows, the characters such as the
double-width and double-height characters must
be printed with the same solenoid.
M-191
Specification
(STANDARD)
- Dot intervals between print solenoid A and B, B
and C, D and E, E and F, and G and H
b =0.22 mm
- Dot intervals between print solenoid C and D,
and F and G
c =0.3 mm
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3) Factory printing specifications
The following are the factory printing specifications. (unit: mm)
2. Character alignment (5 × 7 font)
1. Dot alignment
MAX 0.4
MAX 0.2
MAX 0.2
MAX 0.4
3. Paper feeding pitch
(5 × 7 font, 3-dot line spacing)
4. Pitch between columns
(5 × 7 font, 1-dot line spacing)
3.7 ± 0.56
1.5 ± 0.30
5. Character size (5 × 7 font)
2.6 ± 0.39
1.3 ± 0.20
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2.2 Paper Feeding
1. When printing:
Paper is automatically fed one dot line pitch (approximately 0.37 mm,
0.015") when the print head returns.
2) Space feed
(a) One dot line pitch feeding: Same as when printing
(b) Fast feeding:
Paper is fed three dot line pitches when the print head goes back and
forth by driving the fast paper feed trigger solenoid.
3) Paper release mechanism:
Because of the way the paper release mechanism operates, paper
can be pulled out (straight forward or backward) by stopping the
motor quickly while satisfying the requirements given in Section
2.7.1).
NOTE:
When the motor halts without satisfying the requirements given in
Section 2.7.1), the paper release mechanism will not operate.
4) Manual feed knob (factory option):
Paper can be fed forward or backward by rotating the manual feed
knob when the printer is halted and the paper released.
NOTES: 1. If the paper release mechanism does not operate, paper cannot be fed backward with
the manual feed knob.
2. After the following operation, a paper feed pitch problem or paper feed not-straight
feeding problem may occur.
i. When paper is cut.
ii. When paper is pulled out.
iii. When touching the manual feed knob is held or touched in a way that impedes
rotation during printer operation.
3. Nothing should touch or rub against the manual feed knob during printer operation.
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2.3 Ribbon Cassette
Two types of ribbon cassettes (ERC-09, ERC-22) can be used with the M-191.
Product
Number
ERC-22
ERC-09
Size (mm)
90.9 (W) × 24.9 (D) × 6.3 (H)
{3.58" × 0.98" × 0.25"}
90.9 (W) × 26.4 (D) × 7.0 (H)
{3.58" × 1.04" × 0.28"}
Weight
Approx. 4.0 g (0.14 oz)
Approx. 3.5g (0.13 oz)
Life
Approx. 600,000 characters
Approx. 200,000 characters
(Power supply voltage: DC 4.8V, 25°C {77°F}, continuous printing)
(Print mode is as shown in 2.15)
Color
Black
• Refer to Ribbon Cassette Specifications for more detailed specifications.
• Use only the specified ribbon cassettes. Otherwise, the quality, life, and other characteristics
are not guaranteed.
• If the ribbon cassette is taken out of the package an extended period of time before being used,
uneven printing may occur.
• The ribbon cassette which is bundled in the printer when it is shipped from the factory may not
satisfy the life-time listed in the table above.
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2.4 Paper
1) 1-ply paper roll
a) Type:
b) Size:
Normal paper
57.5 ± 0.5 mm {2.26" ± 0.02"} (paper width)
× 83 mm {3.3"} or less (outside diameter)
× 10 mm {0.4"} or more (inside diameter)
NOTES: Inside end of paper roll should meet the following conditions:
1. No fold is allowed. The paper must be wound so that the paper edge goes along the
internal circumference. (Refer to Figure 2.4.1.)
2. No folding back is allowed.
3. Inside end must not be glued to the core (when a core exists).
Inside end of
paper roll
Correct
Incorrect
Figure 2.4.1
c) Thickness:
d) Weight:
0.06 to 0.085 mm
52.3 to 64 g/m2 {13.9 to 17.0 lb wt}
(40 to 55 kg {18.14 to 24.94 lb wt} / 1000 sheets / 788 × 1091 mm)
2) 2-ply pressure - sensitive paper (Recommended paper)
a) Type:
No-carbon paper (Mitsubishi Paper Mills Ltd.)
N40: Upper sheet + Lower sheet (Blue color printing)
b) Thickness:
Upper sheet:
Lower sheet:
0.066 mm
0.058 mm
c) Weight:
Upper sheet:
Lower sheet:
47.0 g/m2 {12.5 lb wt}
47.0 g/m2 {12.5 lb wt}
d) Printing method:
Upper sheet:
Lower sheet:
Print by ink ribbon
Copy with pressure-sensitive
(possible to print one sheet only)
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e) Form for cut sheet type
57.5 ± 0.5 mm {2.26" ± 0.02"} (paper width)
× 300 mm {12"} or less (paper length)
(1) Size:
(2)Limitation for glued portion
i. Glued portion:
See Figure 2.4.2
ii. Notes: 1. No past can ooze outside the portion beyond the wavy line in the figure.
2. Paper should be pasted evenly.
3. Glued portion must not harden.
4. Whether the printer is under operating or storage condition, glued sheets should
not peel off and paste must not run out (ooze out).
(3) Filing hold position:
(See Figure 2.4.2.)
i. Dimension: Paper width “W”: 57.5 ± 0.5 mm {2.26" ± 0.02"}
Dimension “A”: 30 mm {1.2"} or more
ii. A filing hole can be placed within the shaded area in the figure.
iii. The first line must be printed 5 mm {0.2"} or more below the hole and 30 mm {1.2"} or more
below the top of the paper.
iv. Nothing shall be printed within 15 mm {0.6"} from the end of the paper.
Paper feeding direction
Center
of paper
5 mm or more
30 mm or more
glued portion
1.5 mm or less
End of paper
Figure 2.4.2
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f) Form for paper roll type
Size:
57.5 ± 0.5 mm {2.26" ± 0.02"} (paper width)
× 80 mm {3.2"} or less (outside diameter)
× 10 mm {0.4"} or more (inside diameter)
NOTES: 1. Conditions on inside end of roll paper (with or without a core)
i. No fold is allowed. The paper must be wound so that the paper edge goes along the
internal circumference. (Refer to Figure 2.4.3.)
ii. No folding back is allowed.
iii. Inside end must not be glued to the core (when a core exists).
iv. Upper and lower papers must not be glued to each other.
Upper
paper
Upper paper
Lower paper
Lower
paper
Inside end of
paper roll
Correct
Incorrect
Figure 2.4.3
NOTES: 2. Roll paper sag
When pressure sensitive roll paper is used, the difference in diameter between the upper
and lower papers generates an upper paper sag and, as seen from the side, the initial
circular shape of the paper roll is distorted to form an ellipse. The diameter of the ellipse
eventually becomes larger than the initial diameter of the roll. (See Figure 2.4.4.)
The shape of the case around the roll paper holder should be designed so that it allows
some sag of the upper paper.
Besides this, when a paper take-up device is employed, be careful of its position to prevent
the upper paper sag from being taken up by the device.
Elliptical distortion due to the upper paper sag
Initial diameter of the paper roll
Lower
paper
Lower
paper
Upper
paper
Upper
paper
a) Drop in type
b) Shaft-holding type
Figure 2.4.4
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g) Others (common to cut sheet and roll paper):
(1) Other characteristics
Impact, friction, temperature, humidity, light, and oil contamination do affect the color and life
of no-carbon paper. This means that all these factors should be taken into account when
handling this type of paper. Discuss the details with the paper manufacturers.
(2) Storage
Unused paper should be stored so as to avoid impact, friction, light, and oil, and should be
kept under adequate temperature and humidity conditions.
3) Notes
a) Paper supply load
The paper supply load at the paper entrance should be 0.3 N {approximately 30 gf} or less.
b) Notes on handling paper
(1) Paper with folds, wrinkles, or tears should not be used.
(2) Neither perforations nor holes can be positioned within the printable area.
(3) Paper should be pulled out slowly and straight-forwardly.
(4) When printing is stopped in the middle of a print job and the paper is reset after being pulled
out or moved, printing position and pitch cannot be guaranteed for subsequent printing.
(5) When loading the 2-ply pressure sensitive paper, be sure the upper and lower paper fit
correctly.
c) Pre-print on the paper
Pay attention when printing on paper that leaves coating material on the surface, such as
scratch print because the material left may adhere to the paper feed mechanism and may cause
a machine failure.
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2.5 Timing Detector
Timing Detector is tacho-generator that is directly connected to the motor. It generates 120 output
signals per dot line; 72 output signals correspond to dot position of Print Head and 48 output signals
correspond to Print Head return. These output signals are arranged in a pulse waveform on the
customer side, and are used as Timing signal T.
Timing signal T should be obtained for threshold level to be 0 ± 0.1 V
of Timing Detector output signal.
1) Timing signal T:
1V P-P or more
2) Output waveform:
Timing Detector
output signal
Timing signal T
NOTE: 1.
Tn
Tn+1
Tn+3
Tn+2
denotes a waveform output by the designer’s waveform shaping circuit.
Figure 2.5.1
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2.6 Reset Detector
Reset Detector has Reed-switch that outputs a signal once for each dot line. Reset Detector output
signal is used as Reset Signal that resets the timing pulse counting at each time of print cycle of one
character line or an image.
NOTE: For example, in printing a print cycle of one character line (eg. 5 × 7 font) or a print cycle of a
bit image, Reset signal R is used only when the first Timing signal T in dot line 1 is confirmed.
Printing is run by using the counting of Timing signal T until one character line or each
printing cycle of a bit image is completed. (Refer to Section 2.13, Timing Chart.)
1) Reset signal R:
The reset signal R is recognized after confirming the width of MAKE
period of the reset detector’s output signal is 55 µs or more.
Voltage
DC 2.85 – 10 V
Current
20 – 1000 µA
Instantaneous power
5 mW or less (Resistance load)
2) Rating:
3) Pulse waveform phase:
more than 55 µs
Reset detector
output signal
TYP. 0.56ms (Note 2)
MIN. 0.2ms
T1
T2
Timing signal T
NOTES: 1.
denotes a waveform output by the designer’s waveform shaping circuit.
2. During motor steady driving (except for period from motor starting to generation of Reset
signal R1)
Figure 2.6.1
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2.7 Motor
1) Driving and braking:
NOTES: 1.
2.
3.
4.
Energize the motor driving signal to start a stopped motor.
Shut off the motor drive signal between 80 µs and 500 µs after the
confirmation of Reset signal Rn (Rn is R10 for the 5 × 7 font and 3-dot
line spacing), Short circuit the motor terminals with a transistor by
energizing the motor braking signal (100 ms or more), to quickly stop
the motor. If the motor is not stopped quickly, the paper release
mechanism will not work.
The transistor for motor driving/braking should be supplied on the designer’s side.
Use a low-saturation transistor for motor driving/braking.
Do not turn on the transistor for motor driving and braking at the same time. Doing
so may let the current flow to cause an explosion of the element.
Make sure to allow a time when both transistors for the motor driving signal and the
motor breaking signal are OFF (100 +400/-20 µs in Figure 2.7.1).
2) Stopping for abnormality:
Refer to Section 2.10 and 2.11.
3) Terminal voltage:
DC 4.8 +0.7/–1.0 V (Ni-Cd battery, nominal voltage DC 4.8 V)
DC 4.8 +0.4/–1.0 V (When stabilized power supply is used.)
4) Current
a) Peak current:
1.2 A typical (Motor terminal voltage: DC 4.8 V at 25°C {77°F}, when
the motor is started up)
1.8 A maximum (Motor terminal voltage: DC 5.5 V at 0°C {32°F}, when
the motor is started up)
0.35 A, typical (Motor terminal voltage: DC 4.8 V at 25°C {77°F}, not
including when started up.)
b) Mean current:
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c) Current waveform:
Current (A)
Refer to the Figure below.
1.8
1.5
1.2
0.9
0.6
0.3
0
-0.3
-0.6
-0.9
A
A: When the motor is started up.
B: When the motor is braked.
C: In standby.
C
0.1
0.2
0.3
Time
0.4 0.5
0.6
(s)
B
Motor driving signal
Motor braking signal
100 +400/-20 µs
NOTE: Signals in
100ms or more
should be prepaired by the designer’s side.
Figure 2.7.1
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2.8 Print Solenoids
Dot printing is done by energizing the print solenoids.
1) Number of print solenoids: 8
2) Terminal voltage:
DC 4.8 +0.7/–1.5 V (Ni-Cd battery, nominal voltage DC 4.8 V)
DC 4.8 +0.4/–1.5 V (When stabilized power supply is used.)
The print solenoid terminal voltage and Motor terminal voltage should
satisfy the voltage relationship of the shaded areas in the following
figures.
Print solenoid terminal voltage (V)
Print solenoid terminal voltage (V)
: Effective only when the Ni-Cd battery is used.
5.5
5.2
4.7
4.5
4.3
3.8
3.3
3.8
5.5
5.2
4.7
4.5
4.3
3.9
3.8
5.2 5.5
3.8
Motor terminal voltage (V)
4.5
5.2 5.5
Motor terminal voltage (V)
a) When signal-ply paper roll is used
b) When two-ply pressure-sensitive
paper roll is used
Figure 2.8.1
1.3 ± 0.13 Ω (at 25°C {77°F})
Typ. 2.5 A/solenoid (terminal voltage: DC 4.8 V, 25°C {77°F})
Max. 3.6 A/solenoid (terminal voltage: DC 5.5 V, 0°C {32°F})
5) Pulse width:
Form the leading edge of Timing signal Tn to the leading edge of
Timing signal Tn+1 (See Figure 2.8.2 in the next page.)
6) Power consumption:
Typ. 4.5 mJ/dot (terminal voltage DC 4.8 V, 25°C {77°F})
Max. 9.1 mJ/dot (terminal voltage DC 5.5 V, 0°C {32°F})
7) Energizing duty:
1/3
8) Number of solenoids energized at the same time:
Max. 3
9) Continuous energizing:
One Print Solenoid can be energized continuously up to 300 dot lines
(6 × 4 × 300 = 7200 dots). However, the non-energized time should
always be twice as long as the continuous energized time.
10) Spark killer:
Prepared by the designer’s side. See the M-191 designer’s guide.
11) Protection of solenoid for abnormal conditions:
Refer to Section 2.10 and 2.11.
3) DC resistance:
4) Peak current:
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Tn
Tn+1
Tn+2
Tn+3
Tn+4
Tn+5
Timing signal T
Print solenoid A
drive pulse
Pn
Pn+3
t1
t2
Pn+1
Print solenoid B
drive pulse
TYP 0.56ms
Pn+2
Print solenoid C
drive pulse
Print solenoid D
drive pulse
Pn
Pn+5
Pn+3
Pn+1
Print solenoid E
drive pulse
Pn+4
Pn+2
Print solenoid F
drive pulse
Print solenoid G
drive pulse
Pn+4
Pn
Pn+5
Pn+3
Pn+1
Print solenoid H
drive pulse
Pn+4
Current waveform print
solenoids A, D and G
Within 40µs
NOTE: Signals in
should be provided by the designer.
Figure 2.8.2
NOTES: 1. t1 = t2 ≤ 50 µs
2. For printing, print solenoids A, D and G are energized with drive pulse Pn which has the
pulse width of Timing signal Tn to Tn+1. Next, print solenoids B, E and H are
energized with drive pulse Pn+1 which has a pulse width equal to Timing signal Tn+1 to
Tn+2. In the same way, print solenoids C and F are energized with drive pulse Pn+2,
and then print solenoids A, D and G are energized with drive pulse Pn+3. The 8
solenoids should be driven in the order (A, D, G) - (B, E, H) - (C, F).
3. Design the control circuit so that the current flowing through print solenoids must
become 0 A within 40 µs when the driver to the Print Solenoids is OFF. (Otherwise, the
ink ribbon may be hooked into by the pins or some dots may be missed.)
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2.9 Fast Paper Feed Trigger Solenoid
Paper is fed at high-speed (three pitches when the print head returns) by energizing the fast paper
feed trigger solenoid.
1) Terminal voltage:
DC 4.8 +0.7/–1.0 V (Ni-Cd battery, nominal voltage DC 4.8 V)
DC 4.8 +0.4/–1.0 V (When stabilized power supply is used.)
(Use the same power supply as that for the motor so that the terminal
voltages match.)
2) DC resistance:
20 ± 2.0 Ω (at 25°F {77°F})
3) Drive timing and drive pulse width:
After recognizing the Reset signal R, the first Timing signal T is taken to be Tf1. During the period
from the confirmation of Tf1 to that of Tf8, the fast paper feed is performed.
The same paper feed operation can be performed in the 5 × 7 font (line spacing: 3 dots) printing
mode by driving the fast paper feed trigger solenoid during the period from the confirmation of T841
to the confirmation of T848.
Reset signal R
(T841)
Tf1
Tf2
Tf3
Tf6
Tf7
(T848)
Tf8
Tf9
Timing signal T
Fast paper feed
trigger solenoid
drive pulse
(1)
Drive pulse width
(2)
NOTES: 1. Signals in
should be provided by the designer.
2. Numbers in ( ) denote timing pulses when fast paper feed is performed in 5 × 7 font
with 3-dot line spacing mode.
3. Delay in starting drive pulse in (1): 0.1 ms or less
4. Delay in stopping drive pulse in (2): 0.1 ms or less
Figure 2.9.1
4) Drive circuit:
a) A diode is used as a current suppressor and it should be prepared by the designer.
b) The fast paper feed trigger solenoid should not be disturbed or stopped by noise.
c) Use a low-saturation transistor to drive the fast paper feed trigger solenoid.
(Use the same transistor as that for the print solenoid driver.)
5) Protection of fast paper feed trigger solenoid against abnormalities:
See Sections 2.10 and 2.11.
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2.10 Detection of Abnormal Printer Conditions
1) Detection of abnormal conditions:
In the following cases, the printer is considered to be in an abnormal condition and abnormal
condition handling should be done:
a) When the period for Timing signal T is more than 2.8 ms
For a period of 100 ms after energizing the motor drive signal or after disturbing the motor drive
signal, the monitoring of Timing signal T should be suspended.
b) When the Reset signal is not detected even though more than 150 Timing signals T are
confirmed after energizing the motor drive signals.
2) Handling abnormal conditions:
Whenever an abnormal condition is detected, the motor, print solenoid, and fast paper feed trigger
solenoid drive signals should be shut off immediately:
Acceptable shut off delay time: Motor:
1 second or less
Print solenoid:
Refer to Section 2.11.
Fast paper feed trigger solenoid:
Refer to Section 2.11.
3) Procedure after abnormal conditions:
Check whether or not a paper jam has occurred or if a foreign object has fallen into the printer.
a paper jam or foreign object is present, remove it and restart the printer.
If
2.11 Maximum Allowable Continuous Energizing Time
The continuous energizing time (including the abnormal conditions in Section 2.10) should never
exceed the time shown below.
Print solenoid:
1 second
Fast paper feed trigger solenoid: 5 seconds
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2.12 Terminal Assignments
Connection
Terminal No.
Fast Paper Feed Trigger Solenoid
1
Fast Paper Feed Trigger Solenoid
2
Reset Detector
3
Reset Detector
4
Motor (+)
5
Motor (–)
6
Print Solenoid (B)
7
Print Solenoid (C)
8
Print Solenoid (D)
9
Print Solenoid (E)
10
Print Solenoid (F)
11
Print Solenoid (G)
12
Print Solenoid (H)
13
Common for Print Solenoid
14
Common for Print Solenoid
15
Print Solenoid (A)
16
Timing Detector
17
Timing Detector
18
M
NOTE: Terminal numbers are 1, 2, ...... 18 from left side of cupper leaf pattern of P.C. Board.
1 2 3
• • • • • • • • • • • • • • •
17 18
Figure 2.12.1
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2) Initialization
The printer paper can be released by initializing as follows during power-on.
1. Count the number of timing pulses after starting up the motor. Check whether or not Reset
signal R is generated during the period from the confirmation of Timing signal 59 to the
confirmation of Timing signal 60. Then follow a) or b) below.
a) After the reset shaping, waveform is low in the whole range between Timing signal 59 and
Timing signal 60.
The first Reset signal R is taken to be R1 and the first timing pulse T after recognizing R1 is
T1.
b) In case except a)
Start counting the timing pulses from the next one. Reset signal R after the number of
timing pulses reaches 60 is R1, and the first Timing signal after recognizing R1 is T1.
2. Continue counting Timing signal T. The first Reset signal confirmed after T73 is R2, and the
motor is stopped quickly at the same time Reset signal R2 is confirmed.
3) Description of operation (5 × 7 font)
(1) In case of 3-dot line spacing:
(A) Continuous printing
1. Same as Step 1. of 3).
2. Continue counting Timing signal T. The left-most upper dot of the 1st, 13th, and 25th columns
is printed by applying drive pulse P1 of T1 to T2 to print solenoids A, D, and G.
3. The left-most upper dot of the 5th, 17th, and 29th columns is printed by applying drive pulse P2
of T2 to T3 to print solenoids B, E, and H.
4. The left-most upper dot of the 9th and 21st columns is printed by applying drive pulse P3 of T3
to T4 to print solenoids C and F.
5. The above procedure is repeated, and when drive pulse P69 of T69 to T70 is applied to print
solenoids C and F, the right-most upper dot of the 12th and 24th columns is printed.
6. One dot of character space is obtained for the right-most column (4, 16, 28), (8, 20, 32), (12, 24)
of each print solenoid. Paper is automatically fed one dot when the print head returns during
the time from T73 to T120, and this completes the printing of one dot line.
7. Afterward, counting of timing pulses is continued (T121, T122, ...), and printing is carried out up
to dot line 7. The right-most lower dot of the 12th and 24th columns is printed by applying drive
pulse P789 (from T789 to T790) to print solenoids C and F. This completes the printing of 1
line with the 5 × 7 font.
8. Continue to count the timing pulses, and drive the fast paper feed trigger solenoid for the period
from the confirmation of timing pulse T841 in dot line 8, to the confirmation of T848. Fast paper
feed is performed (3 pitches while the print head moves back and forth), and thus 3-dot line
spacing is obtained.
9. Printing of the next line is started with R1, which is the next reset signal R generated after timing
pulse T886 in dot line 8, and with T1 that is the next timing signal T generated after recognizing
R1.
∗ From 8. on, the fast paper feed trigger solenoid can be energized using reset pulse R as a
reference. (Refer to 8.’ and 9.’ for more details.)
8.’ The reset pulse generated after timing signal T766 of dot line 7 is detected. After this
detection, the first timing pulse is Tf1, and fast paper feed is performed by driving the fast feed
trigger solenoid during the period from the confirmation of Tf1 to that of Tf8.
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9.’ The timing pulses used for driving the fast feed trigger solenoid are counted continuously, and
the reset signal R after Tf46 is taken as R1 and the timing signal T first generated after
recognizing R1 is taken as T1, after which printing is started.
(B) Intermittent printing
1. Same as steps 1. to 7. of 4) (1), (A).
2. In dot lines 8 and 9, the fast feed trigger solenoid is not driven, and the paper is fed
automatically. The reset pulse confirmed after timing pulse T1006 is R10, and the motor is
stopped quickly after this reset pulse is confirmed.
3. Repeat Steps 1. and 2.
(2) When printing again after setting n-line spacing:
(A) Continuous printing
1. Same as Steps 1. to 8. of 4) (1), (A).
2. Printing of the next line started with the next reset pulse (R1) confirmed after timing pulse T886
(or Tf46) in dot line 8. The paper is fed at fast-speed (in the same manner as Step 8. of 4) (1),
(A)) m times until Rm. (m is obtained from formula 1.)
3. The fast paper feed trigger solenoid is not energized, and paper is fed automatically until
R(m+a+1) while counting reset pulses.
4. Printing of the next line is started with R(m+a+1) as R1.
(10×n)/3 = m, remainder a - - (formula 1)
where n:
number of space dot lines
m, a: integer values
(Example)
To feed paper for 40 dot lines (4 lines)
n = 4 → m = 13
⇒ Rm = R13 “ Fast paper feed 13 times
a=1
R(m+a+1) = R15 = The following line, R1.
(B) Intermittent printing
1. Same as Steps 1. to 8. of 4) (1), (A).
2. Printing of the next column is started with the next reset pulse as R1 that is generated after
timing pulse T886 (or Tf46) in dot line 8. The paper is fed at fast-speed (in the same manner
as Step 8 of ) (1), (A)) m times until Rm. (m is obtained from formula 2 below.)
3. The fast paper feed trigger solenoid is not energized, and paper is fed automatically until
R(m+a+1) is confirmed while counting reset pulses. After R(m+a+1) is generated, the motor is
stopped quickly.
4. Start printing in the same manner as Steps 1. to 7. of 4), (A).
(10×n-1)/3 = m, remainder a - - (formula 2)
where n:
number of space dot lines
m, a: integer values
(Example)
To feed paper for 40 dot lines (4 lines)
n = 4 → m = 13
⇒ Rm = R13 “ Fast paper feed 13 times
a=0
R(m+a+1) = R14 = The reset pulse R used for stopping the mortar
quickly.
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4) Bit image printing
When bit image printing is activated, T1 is confirmed according to the procedure described in 4) 1.,
after which printing is carried out while counting timing pulses until the bit image printing is finished.
∗ For the continuous energizing time for the print solenoid, see Section 2.8. 9) to protect solenoids
from heat.
5) How to confirm any Reset Signal Rn
After confirming reset pulse R1, the next reset pulse Rn which is generated after timing pulse T (120
× (n-2) + 46) is taken as Rn.
6) Notes
(1) Periods when the print solenoid must not be energized:
a) From motor start-up to the reset pulse R1 (from motor start-up to steady driving)
b) From T73 + 120n to T120 + 120n (while print head returns)
(n = 0 or more: integer values)
c) From the moment when the fast paper feed trigger solenoid is energized to when the next reset
pulse is confirmed.
(2) The print solenoid drive pulses should not be activated or stopped by noise.
(3) The fast paper feed trigger solenoid drive pulse should not be activated or stopped by noise.
(4) The fast paper feed trigger solenoid should not be energized by the reset pulse which turns off
the motor drive signal.
(5) The reset detector is sometimes on and sometimes not in standby.
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2.15 Life / MCBF Confirmation Conditions
EPSON confirmed the reliability for the printer and the ribbon cassettes (ERC-09, ERC-22) under the
following conditions.
1) Environmental Temperature: Approximately 25°C {77°F}
2) Printer drive voltage:
Terminal voltage DC 4.8 V
3) Paper:
Oji Paper Mfg. Co.,Ltd.
45 kg / 1000 sheets / 788 × 1091 mm for registers
4) Ribbon cassette:
ERC-09, ERC-22
5) Printing Mode:
Repeats the following pattern.
! ” # $ % & ’ ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
! ” #$ %& ’() *+ ,- ./ 01 2 34 56 78 9 :; <= >? @
”#$%&’() *+ ,-./01 234567 89:;<=> ?@A
#$%&’()*+,-./0123456789:;<=>?@AB
$%&’()*+,-./0123456789:;<=>?@ABC
%&’()*+,-./0123456789:;<=>?@ABCD
&’()*+,-./0123456789:;<=>?@ABCDE
’()*+,-./0123456789:;<=>?@ABCDEF
()*+,-./0123456789:;<=>?@ABCDEFG
)*+,-./0123456789:;<=>?@ABCDEFGH
*+,-./0123456789:;<=>?@ABCDEFGHI
+,-./0123456789:;<=>?@ABCDEFGHIJ
,-./0123456789:;<=>?@ABCDEFGHIJK
-./0123456789:;<=>?@ABCDEFGHIJKL
./0123456789:;<=>?@ABCDEFGHIJKLM
/0123456789:;<=>?@ABCDEFGHIJKLMN
0123456789:;<=>?@ABCDEFGHIJKLMNO
123456789:;<=>?@ABCDEFGHIJKLMNOP
23456789:;<=>?@ABCDEFGHIJKLMNOPQ
3456789:;<=>?@ABCDEFGHIJKLMNOPQR
456789:;<=>?@ABCDEFGHIJKLMNOPQRS
56789:;<=>?@ABCDEFGHIJKLMNOPQRST
6789:;<=>?@ABCDEFGHIJKLMNOPQRSTU
789:;<=>?@ABCDEFGHIJKLMNOPQRSTUV
89:;<=>?@ABCDEFGHIJKLMNOPQRSTUVW
9:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWX
:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXY
;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ
<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[
=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[¥
>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[¥]
?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[¥]^
@ABCDEFGHIJKLMNOPQRSTUVWXYZ[¥]^_
NOTE: Except under the above-mentioned conditions, the reliability mentioned in Section 1.17 and
2.3 may not be secured.
Figure 2.15.1
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3. APPENDIX
3.1 Matters Operators must Follow
3.1.1 Setting the Paper
<Steps>
1. Use only the specified paper.
2. Load the print paper into the paper supply unit.
3. Cut the paper end at a right angle and straight and load it into the paper guide, holding it parallel
to the printer. (If the paper is loaded at an angle, a paper feed error or paper feed pitch error may
occur.)
4. Make sure that the paper is not wrinkled or torn.
5. When using 2-ply pressure sensitive paper, make sure that the layers are aligned properly.
3.1.2 Removing the Paper
<Steps>
1. Cut the paper on the supply side, and remove it straight from the paper exit side.
2. When the paper release mechanism is enabled, the paper can be removed from the paper supply
side.
3. With the manual knob model, the paper can be removed by rotating the manual knob.
3.1.3 Handling a Paper Jam
<Steps>
1. Cut the paper end of the supply side, and remove it straight from the paper exit side.
2. If any piece of paper remains in the paper guide, remove it with a tool such as tweezers.
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3.1.4 Handling the ribbon cassette
1. Use the specified ribbon cassettes (ERC-09, ERC-22).
2. It is desirable to install the ribbon cassette after removing the paper.
3. Before mounting the cassette, the ribbon should be tightened by rotating the ribbon feed roller in
the direction shown by the arrow (3-c). Then place the ribbon cassette so that the ribbon is
caught with the notches on the right or left sides of the printer frame (3-d). In this case, if the
knob on the cassette is held with your finger, the spool gear shaft (the shaft that stands toward
the center of the knob from the printer frame) may interfere with the ribbon cassette; therefore the
knob should be free. If the ribbon is turned over, rotate the knob to tighten the ribbon up, so that
the ribbon is installed in the correct position (3-e).
4. To remove the ribbon cassette, push the portion marked PUSH with your finger.
5. When the printer with the ribbon cassette installed is transported, the ribbon cassette may move
out of the proper position. To avoid this, reinstall the ribbon cassette following the description in
2. and 3.
3–c
3–d
3–e
4
Figure 3.1.1
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3.2 Notes on Handling the Printer
3.2.1 Notes on using the printer
1. Since the printer uses permanent magnets (in the motor) and electromagnets (solenoids), it
should not be used in locations where metallic particles or high levels of dust and other
contamination exist.
2. Remove the paper roll when not using the M-191 for a long period. If the printer is left unused
with a paper roll installed for a long period, the paper may become dirty or discolored.
3. One or two dots may be missed when the printer starts printing in the low temperature
environment.
3.2.2 Prohibited Actions
1. Printing (driving the print head) without paper installed and printing outside of the specified print
area described in Section 2.13 7) (1).
2. Do not use the printer when condensation has occurred. Do not power the printer until all
condensation has evaporated.
3. Do not pull the paper toward the reverse direction of the feeding the paper when the paper
release mechanism does not work (stopping due to irregular operation, etc.)
3.2.3 Maintaining the printer
Make sure to maintain the printer according to the M-191 Technical Manual to maintain the printer’s
functionality and reliability. Especially if paper dust and other dust accumulate, the printer functionality
is not guaranteed.
3.2.4 Note on the printer external appearance
Because plated steel plate is used in this unit, the cut edges may get rusty.
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3.2.5 Stamp
The model name and the manufacture history are stamped on the bottom of the printer frame.
EPSON
Model name
MADE IN ∗∗∗∗∗
Version
M-191
011 00
519824
Date of manufacture
Belt name
3.2.6 Basic concept for reliablity
- Description 1. The MCBF rating used in these specifications corresponds to the EPSON concept of the
“reliability guarantee period”.
Epson uses a projected number of printed lines along with exponential distribution to define the
reliability guarantee period and allows an accumulated failure rate of 30% during this period.
2. Due to product tolerances, wear-out failures may in some cases start to occur within the reliability
guarantee period, but design and production generally are aimed at preventing wear-out failures
during the reliability guarantee period.
3. Service life is taken to mean the average service life.
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