The positioner is one or two external axes of the robot,which can be freely programmed,and can be combined with the robot system to realize the axial and radial rotation of the workpiece to achieve good welding results.

　　The positioner has sufficient strength and rigidity to ensure the normal welding of the workpiece and the personal safety of the operator,and has a reliable self-locking function;The ground wire adopts the connection method of ground electrode(double brush,with spring),and is directly installed on the small slewing;