8121 version 4 28-Jun-16 1 of 4 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. 8121 version 4 28-Jun-16 2 of 4 LEATHER - CUTTING AND CLOSING Operate an automatically controlled bar tack sewing machine on footwear uppers 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. 8121 version 4 28-Jun-16 3 of 4 LEATHER - CUTTING AND CLOSING 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. 8121 version 4 28-Jun-16 4 of 4 LEATHER - CUTTING AND CLOSING Operate an automatically controlled bar tack sewing machine on footwear 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.