ISO 14744-5:2000 PDF

Overview

ISO 14744-5:2000 - "Welding - Acceptance inspection of electron beam welding machines - Part 5: Measurement of run-out accuracy" provides procedures and apparatus guidance for measuring the run-out accuracy of moving parts (work table, electron gun, rotating fixtures) of electron beam welding machines during acceptance inspection. The standard applies to machines complying with EN ISO 14744-1 and defines run-out as a systematic geometric error measured as the maximum deviation perpendicular to feed direction in X, Y, Z axes or as axial/radial run-out for rotation.

Key topics and technical requirements

• Scope of measurement: Measurements are to be carried out for all significant directions and axes under the loading conditions specified in EN ISO 14744-1. Specific measurement scope should be agreed for each machine type due to variety in designs.
• Definition of run-out accuracy: Maximum deviation within the welding workspace at right angles to feed direction (X, Y, Z) or axial/radial for rotating parts. Run-out is considered a systematic error parameter characterizing machine performance.
• Test conditions: Acceptance testing is normally performed with a vented work chamber unless otherwise specified.
• Instruments and response time: Use mechanical instruments, optical/laser instruments, or inductive displacement transducers (e.g., dial gauges, straightedges, steel squares, cylinders). Measurement instrument accuracy must meet the limiting values in EN ISO 14744-1 and the instrument response time must be compatible with the positioning device feed rate.
• Common measurement procedures: Examples in Table 1 include straightness checks (X/Y/Z), parallelism between electron gun and work table XY planes, squareness of X–Y and Z movements, axial and radial run-out for rotating fixtures, and run-out under maximum load.
• Evaluation: Measured deviations are compared with limiting values specified in EN ISO 14744-1. The standard does not cover dynamic forces, vacuum level effects, CNC positioning accuracy, or statistical evaluation methods.

Applications and users

ISO 14744-5 is intended for:

• Quality and acceptance inspectors performing factory or site acceptance tests of electron beam welding machines
• Welding engineers and machine manufacturers verifying geometric performance (run-out) of work tables, electron guns, and rotating fixtures
• Maintenance teams and metrology specialists establishing measurement setups or troubleshooting geometric errors Practical uses include acceptance inspection, pre-delivery certification, and baseline performance verification for precision electron beam welding applications.

Related Standards

• EN ISO 14744-1: Principles and acceptance conditions
• ISO 14744-2: Measurement of accelerating voltage characteristics
• ISO 14744-3: Measurement of beam current characteristics
• ISO 14744-4: Measurement of welding speed
• ISO 14744-6: Measurement of stability of spot position

Keywords: ISO 14744-5, run-out accuracy, electron beam welding, acceptance inspection, measurement procedures, work table, electron gun, rotating fixture, dial gauge, laser instrument.