Overview
ISO 1150:1997 specifies the dimensional requirements, tolerances and designation rules for drop wires (lamelles) used in warp stop motions on weaving machines with automatic drawing-in. The standard covers drop wires for mechanical, electromechanical and electrical warp stop motions that are always closed with a U‑shaped thread eylet.
This edition was prepared by ISO/TC 72 (Textile machinery and accessories) and supersedes the 1978 edition. Key graphical references in the standard include Figures 1 and 2 and the consolidated data in Table 1.
Key Topics
- Scope and applicability: Applies only to drop wires suited to automatic drawing-in systems, specifically noting compatibility with Uster and Reed Chatwood systems (types and combinations are defined in the standard).
- Types and classification: Drop wires are classified by motion type:
- M1, M2, M3 - mechanical and electromechanical systems
- E1, E2, E3 - electrical systems
Types reflect suitability for Uster, Reed Chatwood or both systems.
- Dimensions and tolerances: Primary dimensions and tolerances are provided in the figures and Table 1. The standard gives specific form details (for example, head chamfers, key entry orientation and eylet geometry) and allows certain tolerances to be adjusted for thicknesses over 0.4 mm in exceptional cases.
- Designation format: The standard prescribes a clear designation order for specifying drop wires:
- The term "Lamelle" (drop wire)
- ISO reference (ISO 1150)
- Motion type (M or E)
- System type (1, 2 or 3)
- Length Z in mm
- Width in mm (standard width is 11 mm)
- Thickness e in mm
Example designations given in the text:
Applications
- Procurement and specification: Ensures consistent ordering and interchangeability of drop wires across manufacturers and weaving systems.
- Manufacturing and quality control: Provides dimensional and tolerance criteria for production inspection and acceptance testing.
- Maintenance and spare parts: Helps maintenance teams identify correct replacements for mechanical, electromechanical and electrical warp stop motions.
- System compatibility: Reduces integration risks when using automatic drawing-in systems from different suppliers (Uster, Reed Chatwood or equivalents).
Related Standards
- Developed by ISO/TC 72 (Textile machinery and accessories) with liaison to electrotechnical bodies such as the IEC for electrical aspects.
- Users should consult related textile machinery standards from ISO/TC 72 for system-level requirements and any updates or replacements to ISO 1150.
For procurement, design reviews and quality procedures, ISO 1150:1997 provides the authoritative dimensional and designation rules to ensure drop-wire interchangeability and reliable warp stop motion performance in automated drawing-in weaving machines.
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