fusion weld discontinuity- stainless tube automatic welder

[bkt]

I prefer to measure amps, but the equipments to do that are more expensive than the ones to measure voltage... and amps and volts are intrinsically related (ohms law).

You can also monitor the amps on the torch power wire with a DC clamp ammeter.

I will also check is there is some kind of contamination of the pre-welded tube during the process, oil, water, dust or whatever, perhaps cleaning the edges with a cloth impregnated in acetone in a step before the welding could help...

I will ask you also about the weather in your country, humidity and temperature have they changed significantly?

I am just brain storming myself with your problem, I hope any of these ideas are helpfull.

Jon

 

[dannyp]

if it's not a pipe feed problem, and develops after te machene has been running a while, i would look at the power cabels

had a funny issue with one of the welders at work recently,it would weld ok for about 10 minutes then it would start playing up, poor penitation one moment then blowing holes the next, was a bad connection in one of the dinse connectors probaly developed over time, but it had welded themtogether and cooked the cabel

 

[babak]

it seems that the problem is finally resolved. there was a problem in the network, a faulty cable in the neighborhood...

 

[Wozzaaah]

Thanks for letting us know, it's probably one of the last things we'd have considered.