Built-In Sensors in Robotic Arc Welding

Though a welding robot can be programmed to move in a definite path repeatedly, during welding it encounters different weld path from one job to the other for various reasons. Welding jobs are generally not accurate. Small dimensional deviations are expected during joint preparation. Deviations in positioning the work piece on the fixture or the manipulator also cause variation from the originally programmed weld path. Warping of the component during welding is another factor responsible for change in the programmed path.