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Weld Procedure Lock Explained

Kody Wenglikowski
Kody Wenglikowski
Application Engineer | Continuous Processes Group
Sep 09, 2026
Skill Level: Beginner
Applications: Arc Welding
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 In this session, we will go over how weld procedure lock works within FANUC ArcTool and LR ArcTool environments, and why it plays an important role in maintaining weld consistency and quality. This overview focuses on the practical use of weld procedure lock as part of the broader welding workflow, especially for operations that rely on precise parameter control.
We will start by introducing the concept of weld procedures and how they evolved within FANUC’s ArcTool software, particularly following the release of the 30iB platform. From there, we will walk through how weld procedures simplify programming while consolidating essential welding parameters such as amperage, voltage, and wire feed speed. These settings directly impact weld quality, and even small changes can lead to issues like porosity, burn through, or poor penetration.

The video also highlights how weld procedure lock enhances control over these parameters. With this feature, we can prevent unauthorized edits to pre-qualified weld procedures, helping ensure that production stays within defined specifications. This is especially valuable in environments where consistency and compliance are critical. We will also touch on how the feature remains accessible for viewing while still preventing modification unless unlocked by authorized personnel.

This functionality is available on both collaborative and industrial FANUC robots beginning with V9.40/P77 software, making it a widely applicable and practical tool for many welding operations.

Requirements:

  • FANUC robot with ArcTool or LR ArcTool
  • Software version V9.40/P77 or newer
  • Basic understanding of weld procedures and TP programming
  • User permissions that allow access to weld procedure settings

What we will learn:

  • How weld procedures are structured within FANUC ArcTool
  • Why parameter consistency is critical for weld quality
  • How to enable and use weld procedure lock
  • The benefits of restricting edits to pre-qualified welds
  • How this feature supports quality control and operational efficiency

By the end, we will have a clear understanding of how weld procedure lock helps protect weld integrity while streamlining programming and oversight.