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Old 06-03-2018, 07:50 AM
Kabous Kabous is offline
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Join Date: Jun 2011
Location: Stellenbosch, South Africa
Posts: 71
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I had the same problem with stick welding - if we are talking about the same thing - where the last second of welding ends up looking like a microscopic vulcano. I guess under magnification the cone-shaped arc means the rod is melted and sprayed in a circle thus creating an inner lack of material and leaving the pinhole.
I have solved this problem by 'smearing' the last half second of the weld finish across the face of the pool to fill up the hole.

Dont know if this might pertain to mig welding as well.
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