Arc blow and spattering at end of weld.

admin

Trying to figure out why my weld starts off well but starts spattering at the end.  If this is arc blow, why only at the end of the weld and not the beginning? Pic attached.

Attached Images


Reply:I believe arc blow usually happens more at one end of the weld than the other. Try moving the work clamp directly to the end of the plate where it is blowing out and see if that helps...or switch to AC.
Reply:If you have enough room, wrap your ground lead around the part a few times
Reply:

Originally Posted by Billy Brewer

Trying to figure out why my weld starts off well but starts spattering at the end.  If this is arc blow, why only at the end of the weld and not the beginning? Pic attached.
Reply:@ MJD and Louie1961.   I will try both. Thank you.
Reply:

Originally Posted by Oscar

Heat affects magnetism
Reply:Very often I run into arc blow.  One method to defeat it, is to do the work with two welds.  Start them at both ends of the piece, and terminate them in the middle.
Reply:welds look stringy, like u holdin too short of arc.    the spatter/dingalls balls look like too hot (but beads dont).    try a longer arc gap same temp/setting.    its ok to dip ur work piece in water bucket every couple rods on practice.    i 'd run the backing plate/run off f tabs longer, flatbar cheap in that sense, and u can swap ends on ground due to ur suspicions.    i take it u know last 10 - 15 % of good rod length could/often gives u more eratic arc.    looks like a restart at ur question point, could be a toated stub of ur cheap stuff   , cuz , as i renmeber from previously , u buy cheap rod - horbor freight/tractor suppluy/similar - so its hard to say.    cheap rod flakes flux off in chips. and causes arc blow/erradic arc etc.      maybe billy boy brewer can skip the next brewers game, and buy a 50lb can of lincoln (real rod) insteadLast edited by 123weld; 1 Day Ago at 11:30 PM.
Reply:Is that a DC welder if you can switch to ac Sent from my SM-G781U using Tapatalk
Reply:

Originally Posted by Louie1961

Try moving the work clamp directly to the end of the plate where it is blowing out and see if that helps.
Reply:

Originally Posted by 123weld

welds look stringy, like u holdin too short of arc.    the spatter/dingalls balls look like too hot (but beads dont).    try a longer arc gap same temp/setting.    its ok to dip ur work piece in water bucket every couple rods on practice.    i 'd run the backing plate/run off f tabs longer, flatbar cheap in that sense, and u can swap ends on ground due to ur suspicions.    i take it u know last 10 - 15 % of good rod length could/often gives u more eratic arc.    looks like a restart at ur question point, could be a toated stub of ur cheap stuff   , cuz , as i renmeber from previously , u buy cheap rod - horbor freight/tractor suppluy/similar - so its hard to say.    cheap rod flakes flux off in chips. and causes arc blow/erradic arc etc.      maybe billy boy brewer can skip the next brewers game, and buy a 50lb can of lincoln (real rod) instead
Reply:Here's a pic from suggested techniques on this thread. Getting better results, at least less spatter. Thanks!

Attached Images

Last edited by Billy Brewer; 1 Day Ago at 03:10 PM.
Reply:assuming you are using 1/8th 7018, 150 amps is really a LOT. In a horizontal or flat position I am usually running in the 120-125 amp range. In the vertical I might drop back to 110-115.Miller Multimatic 255
Reply:I wouldn't hold a long arc with 7018, need to keep the rod in the puddle.Mike
Reply:

Originally Posted by leightrepairs

I wouldn't hold a long arc with 7018, need to keep the rod in the puddle.
Reply:You can long arc 7018 if you're filling a large gap.  I wouldn't recommend it, unless you're really good at what you're doing...........AND I MEAN GOOD.  I feel the prerequisite to this practice, is learning how to do the rod the right way.  7018 is a drag rod, and you need to learn how to drag it in any position.I mentioned this when I was looking at IC Weld's videos.  He's doing it right for the situation, but it's hard to do if you don't know what you're doing.  The danger is..........folks might think this is the ideal way to run 7018.When you long arc any rod, you're not getting deposition(which can be a good thing), and you're coming back into a cooler puddle.  If your puddle is slag critical, you have to dwell long enough, after you re-enter the puddle, to burn out any impurities.  Not a big deal if you know what''s goin' on.  But, if you don't, you have crud in the weld.To make it even more convoluted............................You have to consider what is "whipping".Moving the rod/arc considerably ahead of the puddle is whipping.  But moving the arc to the forward edge of the puddle doesn't qualify as whipping............if you immediately go back into the puddle............doing this, is just a matter of pushing metal back into the puddle.  You'd have to look at how the welder is doing it, to understand.
Reply:

Originally Posted by Louie1961

assuming you are using 1/8th 7018, 150 amps is really a LOT. In a horizontal or flat position I am usually running in the 120-125 amp range. In the vertical I might drop back to 110-115.
Reply:There is a time and place for technique and whip and ****. But this thread isnt it.I want to see some 12x12 plate coverd with straight dragged beads.Stack these beads 4 tall on both sides.Work on arc length bead profile feed rate, holding a straight line. Start the first bead on the edge of the plate  thats your guide to hold straight across the 12" plateChip and wire brush between a beads.Watch weld.com videos before moving to the welding rod.Watch this video its never harmful to go back to basics.Sent from my SM-G781U using Tapatalk
Reply:

Originally Posted by evan

There is a time and place for technique and whip and ****. But this thread isnt it.I want to see some 12x12 plate coverd with straight dragged beads.Stack these beads 4 tall on both sides.Work on arc length bead profile feed rate, holding a straight line. Start the first bead on the edge of the plate  thats your guide to hold straight across the 12" plateChip and wire brush between a beads.Watch weld.com videos before moving to the welding rod.Watch this video its never harmful to go back to basics.