EN ISO 22827-2:2005 PDF

Overview

EN ISO 22827-2:2005 - "Acceptance tests for Nd:YAG laser beam welding machines - Machines with optical fibre delivery - Part 2: Moving mechanism" (CEN adoption) specifies acceptance and verification tests for the moving mechanism (2D manipulation and limited Z-axis motion) of Nd:YAG laser beam welding machines with optical-fibre delivery. It defines two optional test methods for assessing positioning accuracy, trajectory accuracy, and travelling-speed performance, and sets pass/fail criteria grouped into four accuracy classes (A–D). The standard is not applicable to manually positioned welding cells or fixed-position systems without moving mechanisms.

Key topics and requirements

• Scope: Acceptance testing for X–Y tables, 2D moving optics and similar moving mechanisms; also usable for verification after repairs or modifications.
• Two test methods
  • Type 1 (rigorous classification) - full measurement method used to classify the moving mechanism into classes A (very high) through D (low). Tests include positioning repeatability/accuracy, dynamic trajectory accuracy and speed checks.
  • Type 2 (simpler marking test) - marking-based checks suitable for large-format machines (e.g., 2D moving optics, X–Y tables). Verifies trajectory, straightness, squareness, positioning and speed.
• Positioning accuracy & repeatability (Table 1): example limits per class include unidirectional repeatability ±0.01 mm (class A/B), bidirectional accuracy up to ±0.4 mm (class D), and positioning accuracy expressed per metre (e.g., ±0.05 mm/m for class A).
• Travelling-speed accuracy (Table 2): classes set maximum/minimum/preferred speed tolerances - for example maximum travel speed accuracy ±2% (class A/B) up to ±10% (class D).
• Trajectory accuracy (Table 3): limits for geometric paths (rectangle overshoot/omission, circle roundness, 45° reversal) with tighter limits for higher classes (e.g., roundness 0.05 mm for class A).
• Test conditions: measurements at specified welding travelling speeds (tests at maximum/minimum), at least three measurements averaged, and for tables ≥1 m measure at 1 m intervals. Measurement methods reference ISO 230-2, ISO 15616-2 and ISO/TS 17477.

Applications and users

This standard is essential for:

• Laser welding machine manufacturers and OEMs validating moving-mechanism performance before delivery
• System integrators and industrial end-users performing acceptance tests or post-repair verification
• Quality assurance engineers and welding-procedure developers specifying machine class requirements
• Maintenance teams using the standard for periodic verification of positioning, trajectory and speed performance

Keywords: EN ISO 22827-2:2005, Nd:YAG laser beam welding, moving mechanism, acceptance tests, optical fibre delivery, positioning accuracy, trajectory accuracy, X–Y table.

Related standards

• ISO 230-2 - Test code for machine tools (accuracy & repeatability)
• ISO 15616-2:2003 - Acceptance tests for CO2 laser machines (static/dynamic accuracy)
• ISO/TS 17477:2003 - 2D moving optics acceptance tests