ASTM G56-82(2005)
(Test Method)Standard Test Method for Abrasiveness of Ink-Impregnated Fabric Printer Ribbons
Standard Test Method for Abrasiveness of Ink-Impregnated Fabric Printer Ribbons
SIGNIFICANCE AND USE
This test method differentiates between ribbons on the basis of their ability to cause wear on surfaces with which they come in contact.
SCOPE
1.1 This test method covers the determination of the abrasiveness of ink-impregnated fabric printer ribbons by means of a sliding wear test.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:G56–82 (Reapproved 2005)
Standard Test Method for
Abrasiveness of Ink-Impregnated Fabric Printer Ribbons
ThisstandardisissuedunderthefixeddesignationG56;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
NOTE 1—These two motions ensure that the unused ribbon is continu-
1. Scope
ally supplied to the contact area of the wear specimen; however, the
1.1 This test method covers the determination of the abra-
contact region usually contains a mixture of unused and used ribbon
sivenessofink-impregnatedfabricprinterribbonsbymeansof
surface.
a sliding wear test.
5. Significance and Use
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
5.1 This test method differentiates between ribbons on the
conversions to SI units that are provided for information only
basisoftheirabilitytocausewearonsurfaceswithwhichthey
and are not considered standard.
come in contact.
1.3 This standard does not purport to address all of the
6. Apparatus
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6.1 Ribbon Support Surface—The overall shape of this
priate safety and health practices and determine the applica-
member is that of a cylindrical drum 48 6 1 in. (12206 25
bility of regulatory limitations prior to use.
mm) in diameter, concentric to within 0.0005 in. (0.013 mm)
total run-out, and 8.25+0.25−0 in. (210+6−0 mm) wide
2. Referenced Documents
(seeFig.1).Thesupportsurfaceisthecylindricalsurface.This
2.1 ASTM Standards:
surface shall be rigid, made of metal (Note 2), and have a slot
G40 Terminology Relating to Wear and Erosion
no greater than 0.020 in. (0.5 mm) in it so that the ends of the
ribbon may be fed through into the interior. The interior shall
3. Terminology
contain a mechanism to uniformly provide tension to the
3.1 Definitions of Terms Specific to This Standard:
ribbon specimen. This member shall be able to rotate about its
3.1.1 abrasive wear coeffıcient (for a ribbon)—ameasureof
axis and provide a linear velocity at the surface of the ribbon
the ability of the ribbon to wear surfaces with which it comes
of 321 6 6 in./s (8150 6 150 mm/s).
in contact.The larger the value, the greater the ability to cause
NOTE 2—2024 aluminum with a minimum thickness of 0.25 in. (6.35
wear.The abrasive wear coefficient determined by this method
mm) is adequate.The roughness of this surface should not exceed 20 µin.
isdirectlyproportionaltothevolumeofmaterialremovedfrom
(0.5 µm), CLA.
the steel sphere in the test.
6.2 Wear Specimen Support—This member shall be able to
3.2 For additional terms pertinent to this test method, see
press a rigidly mounted 0.25-in. (6.35-mm) diameter spherical
TerminologyG40.
wear specimen against the ribbon surface and advance the
4. Summary of Test Method specimen across the surface of the ribbon specimen in an axial
direction at a rate of 0.001 6 0.0001 in. (0.254 6 0.025 mm)
4.1 A ribbon specimen is wrapped around the cylindrical
perdrumrevolution(seeFig.2).Themountingshallbeofsuch
surface of a drum. A hardened steel sphere is pressed against
a construction that continual contact with the ribbon surface is
the ribbon surface. While the drum rotates about its axis, the
maintained with a normal load of 0.22 lb (this corresponds to
steel sphere is slowly moved in an axial direction across the
the dead-weight load produced by a 100-g mass) between the
surface of the ribbon (Note 1). After a specified amount of
wear specimen and ribbon surface and sufficiently rigid so that
sliding has occurred, the test is stopped and the volume of
no rotation occurs.
material removed from the steel sphere is determined. This
volumeisthenusedtocomputeanabrasivewearcoefficientfor
the ribbon specimen.
Adiscussionofthewearprocessandtheinfluenceofvariousparametersonthe
wearcanbefoundinBayer,R.G.,“WearbyPaperandRibbon” Wear,Vol49,1978,
ThistestmethodisunderthejurisdictionofASTMCommitteeG02onErosion pp. 147–168 and Bayer, R. G., “ Mechanism of Wear by Ribbon and Paper,” IBM
and Wear, and is the direct responsibility of Subcommittee G02.30 on Wear. Journal of Research and Development,Vol22,No.6,November1978,pp.668–674
Current edition approved Nov. 1, 2005. Published November 2005. Originally An implementation of the apparatus required is discussed in “Testing Machine
´1
approved in 1977. Last previous edition approved in 2000 as G56–82(2000) . for the Evaluation of Wear by Paper,” available from ASTM Headquarters as
DOI: 10.1520/G0056-82R05. G02-1000.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
G56–82 (2005)
mounted ribbon specimen shall be allowed to equilibrate for a
minimum of1hatthe relative humidity and temperature at
which the test will be conducted.
9. Procedure
9.1 Put one end of the ribbon through the slot in the drum
and fasten to the tension device. Then wrap the ribbon around
the surface of the drum so that the outer surface of the ribbon
is exposed. Feed the other end of the ribbon through the slot
andfastentothetensiondevice.Applysufficienttensionsothat
the ribbon uniformly conforms to the surface of the drum and
is held taut. Align the ribbon specimen so that the wear
specimen does not contact or slide off the edges during the
course of the test.
9.2 After the wear specimen is mounted to the wear speci-
mensupport,pressthewearspecimenagainstthesurfaceofthe
ribbon with a load of 100 g. Contact should be made near but
Metric Equivalents
notwiththeedgeoftheribbon.Aftertheloadhasbeenapplied,
in. 0.020 0.25 1 8.25 48
simultaneously start the axial motion of the specimen and the
mm 0.51 6.35 25.4 210 1220
rotation of the drum.
FIG. 1 Ribbon Support Surface
9.3 For ribbon specimens of sufficient width, continue the
5 6
sliding for a minimum of 30 min, or 5.8 310 in. (14.7 310
mm) of sliding, without coming in contact with the edge of the
ribbon specimen. Then remove the wear specimen from the
surface while the drum is still rotating. Record the sliding
duration.
9.4 For narrower specimens for which this cannot be done,
remove the wear specimen from the ribbon surface prior to
contacting the ribbon edge, while the drum is still rotating.
Record the duration of sliding. Then stop
...
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