Abstract: Automatic weld seam tracking takes an important role in the welding industry. Control precision and real-time concurrence of seam tracking has immeasurable effect on the welding quality. It’s significant to increase the precision and reduce the cost of the seam tracking system. The developmental process is researched from the hardware components and control methods. And the development tend of the technique is analysis and expected.

Key words: Automatic weld seam tracking, Control methods, Control precision