Preventing fish eyes at the end of a weld

Cole2534 · Sep 30, 2020

I use a decent amount of Innershield wire (.045", NR-211-MP) in some light weldments and the beads look good until I spot, then it always has that fish-eye look to it.

What can I do to prevent these?

In the pic below I was at 108ipm and 17.2v, IIRC, sticking 14ga tube to 1/8" sheet.

Sent via CNC 88HS

DDoug · Sep 30, 2020

walk the puddle back to the right.

Cole2534 · Sep 30, 2020

digger doug said:
walk the puddle back to the right.

That's all? Damn, I should have thought of that.

kustomizingkid · Sep 30, 2020

Walk the puddle back and pull out slightly before releasing the trigger. The tighter you are distance wise from your contact tip to the puddle the higher the effective "amperage" is... this is a very general statement, but more or less in short arc mig tighter/closer gets you more bite.

BT Fabrication · Oct 1, 2020

That is called underfill. the weld pool doesn't have enough material. Basically you need to pause in place longer to feed more wire so it doesn't crater when it cools and cause a stress riser and a crack potential point. Slight pause or slight backing up will stop it.

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Preventing fish eyes at the end of a weld

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