Hi,
I have Obara welding gun mounted on KRC4 Robot via Automatic Tool changer(Applied Robotics). Gun mastering is lost frequently. Generally improper ATC pin contact is the reason. This time I have replaced ATC servo modules by new ones, still problem coming during spot welding. Gun mastering is lost in specific zone only. Once I master the Gun after problem is occurred, it runs for days before repeating the problem. What are the possible reasons for Gun mastering loss?