Through Arc Seam Tracking (TAST)
Is a software based low cost solution to allow for real time corrections to the robots weld path thru the feedback of the welding current, no additional hardware is required. Two aspects of the robots path are controlled with TAST, the Tip to Work Distance (Vertical) and the Cross Seam Position (Lateral), a sinusoidal weave must be performed while welding in order to use TAST . TAST provides simplification of programming and allows for parts to move during welding (Warping). TAST performance can be affected by a number of factors, some of those factors are listed below. Note that if any of these conditions do exist the TAST parameters can typically be changed to improve tracking and make this the new normal.