8121 version 4
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LEATHER - CUTTING AND CLOSING
Operate an automatically controlled bar
tack sewing machine on footwear
uppers
level:
2
credit:
3
planned review date:
November 2005
sub-field:
Footwear and Leather Trades
purpose:
People credited with this unit standard are able to:
demonstrate knowledge of the function of an automatically
controlled bar tack sewing machine; set up an automatically
controlled bar tack sewing machine; maintain machine and
identify sewing faults; and stitch work on an automatically
controlled bar tack sewing machine.
entry information:
Open.
accreditation option:
Evaluation of documentation by NZQA and industry.
moderation option:
A centrally established and directed national moderation
system has been set up by Competenz.
special notes:
1
Specified industry performance is 55% BSI
performance or equivalent. BSI Performance is the
British Standards Institute internationally recognised
performance system (BS3138) where 100% is the
standard expected from a competent fully qualified
performer using the correct methods and taking the
allowed rest. Other comparable rating or performance
systems such as the 60/80 system are acceptable, with
the appropriate performance adjustment.
2
Company safety requirements must conform to the
Health and Safety in Employment Act 1992 and the
Health and Safety in Employment Regulations 1995.
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Operate an automatically controlled bar
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Elements and Performance Criteria
element 1
Demonstrate knowledge of the function of an automatically controlled bar tack sewing
machine.
performance criteria
1.1
The parts of an automatically controlled bar tack sewing machine are described
in terms of function and purpose, using enterprise equipment.
Range:
1.2
sewing head, automatic thread trimming device, drive mechanism,
needle type, hold down clamp, programme chip and/or
programme cam.
Machine operating controls are identified and described in terms of function and
purpose.
Range:
means of changing programme and/or cam, stitch length control,
operating control.
element 2
Set up an automatically controlled bar tack sewing machine.
performance criteria
2.1
Stitch length meets product specification and/or company requirements.
2.2
Needle meets product specification and/or company requirements.
2.3
Thread meets product specification and/or company requirements.
2.4
Received work is checked to product specification and/or company practice.
Range:
not distorted, no over cuts, notches and/or marks clear,
components complete, size, quantity.
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Operate an automatically controlled bar
tack sewing machine on footwear
uppers
2.5
Programme is chosen to match product specification and/or work matches
programme cam.
element 3
Maintain the machine and identify sewing faults.
performance criteria
3.1
Machine is cleaned and oiled according to company requirements and
manufacturer's recommendations
3.2
Thread faults are identified and their effect is explained.
Range:
3.3
tension variation, fraying, breaking.
Stitch faults are identified and their causes explained.
Range:
slip stitch – worn needle, poor quality thread, incorrect timing;
lock not in centre of material – tension adjustment;
laying of stitch – incorrect needle type, worn needle.
element 4
Stitch work on an automatically controlled bar tack sewing machine.
performance criteria
4.1
Components are assembled and work is positioned and held by hold down
clamp according to product specification.
4.2
Work is completed to specified industry performance standard.
4.3
Work is completed to company quality standards.
Range:
stitch appearance, stitch length, accuracy.
4.4
Documentation is completed to company requirements and practice.
4.5
Work practices meet company safety requirements.
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Operate an automatically controlled bar
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uppers
Comments on this unit standard
Please contact Competenz info@competenz.org.nz if you wish to suggest changes to the
content of this unit standard.
Please Note
Providers must be accredited by the Qualifications Authority or a delegated interinstitutional body before they can register credits from assessment against unit standards
or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by the Qualifications Authority before
they can register credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit
standards must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for providers wishing to
develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
This unit standard is covered by AMAP 0030 which can be accessed at
http://www.nzqa.govt.nz/framework/search/index.do.