VR006 Weld Issue

[Stupidav]

Our problematic VR006 robots are part of a 2 robot cell. The robots are located between 2 horizontal rotary fixtures.

The "Master" robot when the weld is turned on and the robot is welding, the Door Stop alarm flashes and the both robots Stop. This only happens on one of the 2 fixtures. When welding on the other fixture the robot does not have a problem. If the Weld is turned off the there is no problems.

Any Idea on what might be causing this?

Any help / ideas are greatly appreciated!!!!

[prerobot]

We ran into this same problem a couple of years ago. The cell was running fine for years but then started having problems like you are describing. When an arc was established you could see the part sensors turn off and then turn back on after the robot faulted out and stopped welding, but only on one side. I don't remember what was done to fix the problem. I will ask around and try to find an answer. Are any of your safety switches in your door stop circuit powered by 24 vdc? Is this a PerformArc system or custom?

[prerobot]

They told me this is what they did to fix the problem. They had some inductive sensors that checked part present. The sensors would turn off when an arc was established and the plc would tell the robot to go into a "HOLD". They had to adjust all of the sensors as close as possible. The sensors would then stay on during welding. Must have something to do with the magnetic field. Not really solving the problem but a way around it.

Hope this helps

[Stupidav]

It is a PerformArc.

Currently we do not have any sensors on our fixtures.

[blizzard]

I would try to jump out the door switch just out of process of elimination. Careful doing so as you safety feature would not be active. This will tell you if you have some form of interuption in the circut as you're welding.