The CPTZ50Q commutate welder is the speciallize equipment of the DC electrical machinery armature down-lead and the commutator welding such as automobile electrical machinery, power tool, micromotor and so on weld. Besides feeds and aligns manually, other transportation is all completely controls by the CPU automatically. The machine spot welding automatically and indexing, until the armature spot welding finishes. This equipment structure is compact, the precision is high, easy to operate, and security.