Posted by fixt on October 30, 2018 at 05:10:26 from (50.111.4.139):
In Reply to: How to finish a weld posted by SVcummins on October 29, 2018 at 20:18:09:
Maybe I can get this picture to work
The weld looks good except for a couple minor things. Its a "hot" weld. There's slight undercut near the middle on the bottom. A little dwell time on the ends help to fill up the end cavity for the start, some people use a little weave to begin.
On a flat plate weld like that after my root pass and clean out, I set the welder to somewhere around 95 amps on the DC setting, using a 1/8 7018 and hold it at a 45 angle, just lay it down and let it burn. It's different for each welder, but usually somewhere around that.
You'll know it's right when the flux just peels away and stands up on its own; it will be a brown color. Repeat passes as necessary and cap with a little weave so you get a slightly proud bead. Sometimes you can just feed in rod and let it build up a little for the ends. This is harder as it tends to stick the rod, but it works. It depends on what works for you.
It looks good with plenty of penetration just a little hot with some spatter. The under cut is minor. Nothing wrong with it.
Caveat: I'm not a welder though I did play one in a previous life as a millwright for a sawmill company. It's a perishable skill and there ain't nothing wrong with running test beads to insure settings to suit you.
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