If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
Are you talking about a really short distance at the end of your pass? I had a problem for a while when I was at the end of my tig passes that sounds somewhat similar to yours. I figured out that if I slowly rolled back my current right at the end and let the gas stay on it for several seconds after the arc was stopped I stopped seeing the bubbles. I don't know if this will apply to your situation but hopefully it may help. Adam
Miller 251/30A spool
Precix 5x10 CNC Router12"Z
Standard modern lathe
Cheap Chinese mill that does the trick... sort of...
horizontal 7x12 bandsaw
Roland XC540 PRO III
hammer and screwdriver (most used)
pooper scooper (2nd most used...)
If i step off the heat at the end of the weld, the puddle will shrink back a bit and there will be a small pit in the very center of the bead.
So back off the heat just enough to solidify the bead, and then heat it back up a bit and back up a little. This seem to leave a fairly decent finish to the bead.
What picks my A_ _ is when the very end of the work "falls off" or melts becuase i didnt back off the heat. Too busy thinkin 'bout girls or sumthin....