PowerPro 205SI AC TIG pre-flow not coming on

The first time I TIG on AC the pre-flow works but subsequent welds the arc starts immediately without any pre-flow. Any ideas?

Thanks
Don

Gee,

It may be possible that you're just reinitiating a subsequent arc start while the post flow is still going, so you're not hearing any newly initiated pre-flow starting, i.e. if your post-flow is at 20 sec, turn it down to about 5 sec.

I usually only set for about .5 sec of pre-flow, if at all.

Quote:

---

Originally Posted by DTuer

The first time I TIG on AC the pre-flow works but subsequent welds the arc starts immediately without any pre-flow. Any ideas?

Thanks
Don

---

If you are using in 2T or 4T or even pedal, and pull away and break the arc before the arc cycle is properly terminated, this could be a cause.