Return current roller for automatic welder

A welding apparatus comprising:

• a welding torch mounted to a frame and electrically connectable in a source current path of a welding current source;
• a return current roller assembly comprising a pivotable A-shaped frame wherein a pitch of the A-shaped frame is pivotally variable, the return current roller assembly is pivotably mounted to a strut, the strut is mounted to the frame, and the return current roller assembly is rotatable about a longitudinal axis of the strut;
• a first electrically conductive return current roller rollably mounted in the return current roller assembly a first fixed distance from the welding torch, and second electrically conductive return current roller rollably mounted in the return current roller assembly a second fixed distance from the welding torch,
• wherein the first return current roller and the second return current roller are each electrically connectable in a return current path of the welding current source, and respectively have a first rim and a second rim each sized and shaped to roll in electrically conductive contact with an unwelded seam of a workpiece, and
• wherein the frame is coupled to a moveable rail for movement of the welding torch and the return current roller assembly together along the unwelded seam on a same side of the workpiece.