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_..; ENGINEERING PRODUCT SPECIFICATION---- C EnTRDnl CS®

sPEc. No. 00002195-9001

REV X2

DATE November 30, 1983

1. 0 2.0 3.0 3. 1 3.2 4.0 5.0 6.0 7.0 7. 1 7.2 7.3 7.4 8.0 8. 1 8.2 8.3 9.0 10.0 10. 1 10.2 10.3 10.4 10.5 10.6 1

o.

⁷

10.8

TABLE OF CONTENTS

GENERAL DESCRIPTION • • • • • • • RELATED DOCUMENTS • • • • • • • •

PAGE

PRINT HEAD CHARACTERISTICS AND PERFORMANCE

2 OF

PRINT HEAD CHARACTERISTICS • • • • • • • PRINT HEAD PERFORMANCE • • • •

PRINT HEAD OVERALL SIZE AND WEIGHT TEST EQUIPMENT OPERATION • • • • •

8

SERVICE REQUIREMENTS

. . . . . . . .

ENVIRONMENTAL REQUIREMENTS OPERATING ENVIRONMENT • STORAGE ENVIRONMENT •

THERMAL DESIGN

. . . . . . .

SHOCK AND VIBRATION • RELIABILITY • • • •

DEFINITION OF A FAILURE • • MEAN TIME TO FAILURE (MTTF) MAINTAINABILITY • • •

SAFETY

OPERATING PROFILES • • • • . • • • VOLTAGE PROFILE • • • • • • • • • • CURRENT PROFILE • • •

IMPACT FORCE PROFILE

IMPACT FORCE vs WTT PROFILE • • • • • TIME TO IMPACT vs WTT PROFILE • • • DISPLACEMENT PROFILE • • • • • • • FREQUENCY RESPONSE vs WTT PROFILE • FREQUENCY RESPONSE vs RATED LIFE

PAGE

3 3 3 3 4 4 5 5 5 5 5 5 5 5 5 6 6 6 6 6 7 7 7 8 8 8 9

•

...

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ENGINEERING PRODUCTP~fc~~!~ICAJo\Qfi 95 ^_ 9001 CEnTRDn1cs®

_{REV X2}

DATE November 30, 1983 PAGE 3 OF 8

1.0 GENERAL DESCRIPTION

This specification defines an 18-wire in-line stored energy dot matrix impact print head assembly. The stored energy print head is a dot matrix impact printing device for the use in the following printers.

A. Regular high speed dot matrix printer.

B. High resolution dot matrix printer.

C. Graphics dot matrix printer.

2.0 RELATED DOCUMENTS A.

B.

c.

D.

E.

CDCC 80001003-9001 CDCC 80002188-9001 CDCC 80002189-9001

Paper Specification

355 Print Quality Specification 355Ribbon Specification

F.

CDCC Engineering Standard CDCC Engineering Standard CDCC Engineering Standard

001 014 011

3.0 PRINT HEAD CHARACTERISTICS AND PERFORMANCE 3.1 PRINT HEAD CHARACTERISTICS

A. Print Wire Diameter

B. Print Wire Column Center-to- Center Separation

c.

Print Wire Vertical Center-to- Center Separation

D. Wire Tip Travel (Free)

E. Head to Platen Gap (Head Gap Hg) F. Dynamic Print Range

G. Coil Resistance (In free air at 68°F room temp.)

H. Coil Inductance (in free air at 1000 Hz)

I. Drive Voltage J. Drive Current K. Drive Pulse Width

Single Actuator Alone

Individual Actuator in Print Head L. Drive Scheme

.0138-.0140 inch .0301 + .0006 inch .0146 + .0004 inch .025 inch min.

.013 + .003 inch*

.006 Tnch

4. 1 (REF) ohms .146 (REF) mH 36-42 volts 2.0-2.2 amp.

250-280 us 300' + 20 us

Current Limited Pulse

*3.1 E 1 ·set up without paper or ribbon for typical 1 ply paper.

Multi ply paper requires additional gap to maintain print quality and avoid smear and paper jam.

2 This represents dynamic print range over which the print head performance (Section 3.2) must be main- tained.

COMPANY CONFIDENTIAL

C-3-75-126

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ENGINEERING PRODUCT SPECIFICATION---....

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C:EnTRDn1c:s®

SPEC. NO. 80002195-9001 REV

DATE PAGE

X3

November 30, 1983

4 OF 8

3.2 PRINT HEAD PERFORMANCE

Impact force and frequency response of "Single Actuator" alone and "Individual Actuator in Print Head" on one ply paper with ribbon against steel platen are specified as follows:

A.

B.

c.

Single Actuator

Testing Conditions: Head Gap Pulse Form

Driving Voltage 1. Impact Force (to be tested at

20 Hz)

2. Frequency Response

Individual Actuator in Print Head Testing Conditions: Head Gap

Pulse Form

Driving Voltage 1. Impact Force (to be tested at

20 Hz)

2. Frequency Response

Nominal variation of wire-to-wire Flight Time in Print Head

.013 inch

2.0 amp x 260/270 us Strobe

36 volts min.

0.5 Kg min.*

1.7 KHZ min.

.013 inch

2.0 amp x 300/320 us Strobe

36 volts min.

0.5 Kg min.*

1.6 KHZ min.

60 us

D. Print Head Performance - The print head must be capable of performing to the following specifications:

Head Gap .010-.016 inch

Driving Voltage 36-42 volts

Impact Force - Acceptable print quality darkness of 1 ply paper through 6 ply paper with ribbon.

Frequency Response 1.6 KHz min.

E. Rated life of each individual

actuator in head 500 x 106 dots

F. Print Head Life 250 x 106 characters G. Maximum coil surface temperature for

satisfied performance (with 20°c

ambient temperature 15ooc

*3.2 A1&B1 Force measurements made using 60 KHz notch filter.

4.0 PRINT HEAD OVERALL SIZE AND WEIGHT A. Overall Size

B. Weight

2.70 Dia x 3.0 L 350 gm (12.4 OZ)

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-....;:;•..._. --ENGINEERING PRODUCT SPECIFICATION---.

..

CEnTRDnlCS~

SPEC. NO. 80002195-9001

REV X2

DATE November 30, 1983 PAGE 5 OF 8

5.0 TEST EQUIPMENT OPERATION

To measure output parameters required by this specification, test the print head on the frequency and impact tester provided and maintained by test equipment engineering following approved operating and recording procedures.

6.0 SERVICE REQUIREMENTS

The stored energy print head is designed to require no service or maintenance throughout its specified life. The print head will be an operator changeable item that upon failure is

replaced by a new head.

7.0 ENVIRONMENTAL REQUIREMENTS 7.1 OPERATING ENVIRONMENT

The Print Head Assembly must be capable of operating reliably per Centronics Engineering Standard 001, Class B.

7.2 STORAGE ENVIRONMENT

The Print Head Assembly must be capable of operating reliably after storage under the following conditions:

A. Temperature/Humidity per Engineering Standard 001, Paragraph 3.2, Class B. ·

B. Altitude - Per Engineering Standard 001, Paragraph 4.2.

7.3 THERMAL DESIGN

The Print Head Assembly must operate reliably when the tempera- ture surrounding the solenoids is 20QOF (93.30C).

7.4 SHOCK AND VIBRATION

Refer to Centronics Engineering Standard 001, Class B.

8.0 RELIABILITY

8.1 DEFINITION OF A FAILURE

A failure is any malfunction of mechanical or electrical hardware which prevents full operation of the Print Head mechanism as defined in Section 3.2D.

COMPANY CONFIDENTIAL

C-3-75-126

-~...;:•:.:...·

--ENGINEERING PRODUCT SPECIFICATION---.

•

c:enTRon1cs®

8.2 MEAN TIME TO FAILURE (MTTF)

~PEC. NO.

REV DATE PAGE

80002195-9001 X2

November 30, 1983

6 OF 8

The MTTF for the Print Head shall be independent of duty cycle.

The MTTF is 500 million dots per actuator. Reliability will be tested per Centronics Engineering Standard 014 at a "B10" Life with 90% confidence.

8.3 MAINTAINABILITY

Maintainability requirements are as follows:

A. Spare parts - The design must allow for availability of spare heads for a period of five (5) years from the date of sale of each mechanism.

9.0 SAFETY

Print Head Assembly must meet the safety standards of Centronics Engineering Standard 011.

10.0 OPERATING PROFILES (Reference Only 10.1 Through 10.6)

The following profiles show the results of varying one or more conditions while holding the remaining conditions per Section

3. They should be used as a guide depending on driver charac- teristics, magnetic and tolerance conditlons.

10.1 VOLTAGE PROFILE

VOLTAGE (VOLTS)

260/300 ^,US

________ I __

36v

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--"'---ENGINEERING PRODUCT

SPECIFICATION---~

.. CEnTRDnlC:S~

10.2 CURRENT PROFILE

CURRENT (AMPS)

SPEC. NO.

REV DATE PAGE

80002195-9001 X2

November 30, 1983 7 OF 8

TIME (_µs)

10.3 IMPACT FORCE PROFILE

IMPACT FORCE

(Kg)

260

URRENT PROFILE - 0.5 kg (MIN)

( ..LlS)

AS

10.4 IMPACT FORCE vs WTT (WIRE TIP TRAVEL) PROFILE

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C: EnTRDnl C: 59

SPEC. NO. 80002195-9001

10.5 TIME TO IMPACT vs WTT PROFILE

TIME TO .MAX IMPACT

600

(A)..S) 400

200 0

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10.6 FREQUENCY RESPONSE VS WTT PROFILE

FREQUENCY RESPONSE

(HZ) 2000

1600

1200

800

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REV DATE

X2

November 30, 1983

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