Non-contact current sensor

non-invasive

Description
The function of the arc sensor is based on measurements of the welding current. The measurement and correction routines take place during welding and directly compensate for any tolerances that occur. The sensor system does not require any attachments that restrict accessibility of the welding torch.

Operation
The welding torch performs an oscillating movement during welding and measures the welding current at defined points. The measurement results are used to determine the position of the welding torch over the seam. The calculated correction values are transmitted to the robot's path control and the position is corrected immediately. The measuring cycle is repeated over the entire welding section and compensates for changes such as heat distortion. The tolerance and correction values determined can be saved and reused for welding subsequent cover layers.

Unique selling points

• Recognising and compensating component tolerances before welding: ensures consistent weld seam position
• No additional attachments required: accessibility of the welding torch is maintained
• Programming within the robot sequence programme: no special additional programming skills required
• Measuring cycle during welding: sensor measurement and correction run during welding without extending programme runtime
• Saving correction values: allows reuse for multi-layer welding

Technical features / specifications

• Measurement principle: measures welding current to determine torch position over the seam
• Operation: measurement and correction routines executed in real time during welding
• Correction: calculated correction values transmitted directly to robot path control for immediate position correction
• Movement: welding torch performs an oscillating movement and measures current at defined points
• Tolerance compensation: compensates for component tolerances and changes such as heat distortion throughout the welding section
• Data handling: determined tolerance/correction values can be saved and reused for subsequent cover layers (multi-layer welding)
• Installation: sensor system does not require attachments that affect torch accessibility
• Impact on runtime: measuring cycle performed during welding without increasing programme runtime
• Integration: programming is performed within the robot sequence programme; no special additional programming skills required
• Efficiency: enables precise welding through real-time compensation without additional hardware