Over the last 15 years, CWT has designed and built custom systems for specific applications, which utilize our patented through-the-arc sensing technology for seam tracking and adaptive torch positioning operations. 

The Thru-Arc™ positioning system, by sensing and utilizing the real-time arc voltage and/or current signals, measures the joint geometry relative to the torch position.  It then institutes cross-seam and/or in-out corrections to the system's slide assemblies.  The corrections are made, as required, to correct for two-dimensional deviations between the path of the welding system and the weld joint. 

In essence, then, the Thru-Arc™ system provides eyes to the welding system.  The CWT Thru-Arc package sees through the welding arc itself, requiring no probes or external devices of any kind.