ISO 5243:2004

Overview

ISO 5243:2004 - "Textile machinery and accessories - Numbering of heald frames and drop wire bars in a loom" - defines the principle for how heald frames and drop wire bars (lamelles for warp-stop motions) are to be numbered in a loom. This second edition (2004) is a technical revision of the original 1977 standard and was developed by ISO/TC 72 (textile machinery), subcommittee SC 3. The standard’s core requirement is that numbering is applied from the weaver’s side of the loom, as illustrated in the referenced figure.

Key topics and requirements

• Scope: Applies to numbering of heald frames and drop wire bars used with warp stop motions in looms.
• Numbering principle: Components must be numbered starting from the weaver’s side of the machine (the side identified as “côté tisseur” in the standard).
• Components covered: Heald frames (also called heddle frames) and drop wire bars (lamelles for warp-stop motions).
• Reference diagram: The standard includes a figure showing the orientation and the side from which numbering should commence.

Note: ISO 5243:2004 states the principle but does not prescribe a detailed alphanumeric scheme beyond the start-side requirement; implementers should follow the principle in their documentation and drawings.

Applications

• Ensures consistent identification of heald frames and drop wire bars across:
  • Machine drawings and assembly instructions
  • Maintenance and repair procedures
  • Spare parts catalogues and ordering
  • Troubleshooting and loom setup guides
  • Integration of mechanical layout with electronic control and monitoring systems
• Promotes clear communication between manufacturers, subcontractors and textile mills, reducing assembly errors and downtime.

Who uses this standard

• Textile machinery manufacturers and designers
• Loom assembly technicians and maintenance teams
• Spare-parts and technical documentation authors
• Textile engineers, production managers and quality assurance personnel
• Technical training and educational programs for loom operation and servicing

Related standards

• Other ISO publications produced by ISO/TC 72 - Textile machinery (refer to the committee for complementary standards on loom components and testing)
• Industry documentation and company-specific numbering or part-identification systems that implement the ISO principle

By following ISO 5243:2004, organizations achieve a simple, standardized approach to numbering critical loom components, improving clarity in documentation, servicing and parts management. Keywords: ISO 5243, heald frames, drop wire bars, warp stop motion, loom numbering, textile machinery standard.