MRC SK6 ARC problems

Hello,

I'm Sander.

I have this old MRC SK6 robot and i'm having weird issues with the arc on. I'm getting no switching on ARCON command. I can manually feed, retract the wire and switch on the gas, but it does not react to the ARCON command. Have you guys had this situation before? It was working before Igot the robot, they no issues before. I checked the wiring on the MEW02 board and looked everything to be in order. The board

The Welder that is used is a KempArc Pulse 450. If that gives any indication.

Tested the ArcOn relay manually and it worked. All of the relays worked just fine.

Closed the circuit on the welder to see if it welds and it did.

I got it working under the Gas Purge relay by switching the connections and manually set the output in the Program. But that doesn't really solve my issue. Still unable to use the ArcOn command for unknown reason.

There is no other interface than The MEW02 and the analog interface from KempiArc Pulse 450.

I'm at a real loss here. It worked before we got it, but now it's not, that's the confusing part.

Yes we know unfortunately. But thankfully we got it working. Last owner added a safety check system to the controller which caused the ARCON command not to work. We were able to disable it and it started welding with the ARCON command.

Since the last owner dose not communicate, we had to figure this out the hard way.