Mig Welding any better?

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Welding on some 1/4 plate MIG welding 20cfh 21v 37 wire speedLincoln 140 Pak MIG Everlast powerarc 140 STLincoln Tombstone
Reply:You should probably do 2 passes on 1/4 plate to do a fillet weld. If its a but weld dont expect them to be very strong.The top pic looks like you are moving a little fast.old Miller spectrum 625 Lincoln SP-135 T, CO2+0.025 wireMiller model 250 and WP-18V torchCraftsman 100amp AC/DC and WP-17V torchCentury 115-004 HF arc stabilizerHome made 4 transformer spot welderHome made alternator welder
Reply:they don't look terrible, but the bottom picture looks like it has lack of fusion on the bottom toe, and the top pic has a nasty crater at the end of the weld that you didn't fill. that will be a problem. I would be interested in some different angles of the toes and the back of the joint to see what kind of penetration you got with that little mig machine. Per Lincoln, 1/4 inch is beyond what that machine is rated for in a single pass. What kind of joint were you going for? looks like a butt weld that you tried a bend test on afterwards? Hard to tell. What is the material type (steel?) and how did you prep the joint? beveled? etc? The top weld almost looks like a stick weld. weird.Miller Multimatic 255
Reply:Originally Posted by Louie1961they don't look terrible, but the bottom picture looks like it has lack of fusion on the bottom toe, and the top pic has a nasty crater at the end of the weld that you didn't fill. that will be a problem. I would be interested in some different angles of the toes and the back of the joint to see what kind of penetration you got with that little mig machine. Per Lincoln, 1/4 inch is beyond what that machine is rated for in a single pass. What kind of joint were you going for? looks like a butt weld that you tried a bend test on afterwards? Hard to tell. What is the material type (steel?) and how did you prep the joint? beveled? etc? The top weld almost looks like a stick weld. weird.