250EX problems with foot pedal

[Boosted P]

Yea, you probably cut through one of the HF board wires when you put the cover back on. They lap over the side of the board (left side looking from the front). The board is mounted upside down, mid center towards the front of the machine on the left side.

I can assure you the 250EX is the cream of our analog TIG units, you're just have a run of bad luck.

After messing around with it for a bit longer I found the issue.

For some reason the "Pre Flow" knob was turned to about 5 seconds causing the start delay of the HF circuit. I never thought to look at that, and did not think to relate it to the actual "weld start" condition. It makes sense when you think about it, I just though of it as gas related only, and since I had gas flow did not think to mess with it.

Thanks for all the suport, really appreciate it.

Hope this is the last of any problems with this machine.

Also, has Everlast though about a filter kit for the cooling fan? I have been using compressed air to keep the inside clean (blowing it all out with the cover off), but a filter system would be much better.

[Zmechanic]

Also, has Everlast though about a filter kit for the cooling fan? I have been using compressed air to keep the inside clean (blowing it all out with the cover off), but a filter system would be much better.

Interesting point on this. The company I work for, we have cooling fans on some of the stuff we make/sell. It actually turned out to be more of a liability to have filters than to not have them.

Without them, things get dirty and not so pretty. But WITH filters, customers would forget about them and neglect them (especially mounted in a rack). They would get plugged and cut off air until stuff starting overheating.

Temperature causes exponentially increasing aging on electronic components, and it actually caused MORE failures than no filters at all.

[GUNNER]

After messing around with it for a bit longer I found the issue.

For some reason the "Pre Flow" knob was turned to about 5 seconds causing the start delay of the HF circuit. I never thought to look at that, and did not think to relate it to the actual "weld start" condition. It makes sense when you think about it, I just though of it as gas related only, and since I had gas flow did not think to mess with it.

Thanks for all the suport, really appreciate it.

Hope this is the last of any problems with this machine.

Also, has Everlast though about a filter kit for the cooling fan? I have been using compressed air to keep the inside clean (blowing it all out with the cover off), but a filter system would be much better.

Just be careful to NOT get the nozzle too close to the boards when doing this. Sometimes the things attached to the boards aren't all that solid and compressed air can cause them to break loose.. Seen it happen before and it's almost impossible to figure out what all is damaged when that happens.. I use compressed air as well but I stay way back from the boards when doing that..

[srp]

We use compressed air in a can for computers because will do not want to spray air compressor oil all over our electrical components and that too, not to blow chips out of the board. LOL