8108 version 4
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LEATHER - CUTTING AND CLOSING
Set up and use a single needle
lockstitch sewing machine in the
footwear industry
level:
2
credit:
6
planned review date:
November 2005
sub-field:
Footwear and Leather Trades
purpose:
People credited with this unit standard are able to: explain
the operation of a single needle lockstitch sewing machine;
set up the machine; maintain the machine; identify and
explain effect of sewing faults; and use the sewing machine
to complete the common industry task to specified industry
performance and company quality standards.
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 Health
and Safety in Employment Regulations 1995.
3
To demonstrate the achievement of the standard
referred to in special note 1 the trainee will be able to
complete the common industry task. This task is
available from the Leather and Shoe Research
Association (LASRA).
8108 version 4
28-Jun-16
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LEATHER - CUTTING AND CLOSING
Set up and use a single needle
lockstitch sewing machine in the
footwear industry
Elements and Performance Criteria
element 1
Explain the operation of a single needle lockstitch sewing machine.
performance criteria
1.1
The parts of the lockstitch sewing machine are identified and described in terms
of function and purpose.
Range:
needle, top thread path, bobbin, bobbin winder, pressure foot
and/or pressure wheel, needle plate, motor, drive path.
1.2
The thread tension controls are identified and described in terms of function
and purpose.
1.3
The method of stitch formation is explained and the relationship of the parts
described in terms of function and purpose.
Range:
1.4
needle, needle plate, bobbin, bobbin case, hook.
Machine operating controls are identified and described in terms of function and
purpose.
Range:
treadle, pressure foot and/or pressure wheel lifting device, drive
wheel, reversing control, stitch length control.
element 2
Set up machine.
performance criteria
2.1
Needle is changed to the manufacturer's specification.
2.2
Machine is threaded up to manufacturer's specification.
8108 version 4
28-Jun-16
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LEATHER - CUTTING AND CLOSING
Set up and use a single needle
lockstitch sewing machine in the
footwear industry
2.3
Bobbin is changed to manufacturer's specification.
2.4
Stitch length meets company specification and product requirements.
2.5
Tension meets company specification and material requirements.
element 3
Maintain machine.
performance criteria
3.1
Machine is cleaned according to company requirements.
3.2
Machine is oiled according to manufacturer's recommendations and company
requirements.
element 4
Identify and explain effect of sewing faults.
performance criteria
4.1
Worn needles are identified and replaced according to company requirements
and their effect on stitch formation is explained.
4.2
Thread faults are identified and their effect is explained.
Range:
4.3
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 5
Use sewing machine to complete common assessment task.
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LEATHER - CUTTING AND CLOSING
Set up and use a single needle
lockstitch sewing machine in the
footwear industry
Range:
industry standard tasks numbers 1 to 5.
performance criteria
5.1
Work is completed to specified industry performance standard.
5.2
Work is completed to company quality standards.
Range:
5.3
tension, accuracy to marks, edge distance.
Work practices meet company safety requirements.
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.