Hanshen FKR350, Operation Manual

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esides very small current welding ,usually
there is a small pit when finish welding
(welding end
）， this pit calls "crater"
the reason of formed pit arising by arc
pressure and metal cold shrink after
burning general speaking
，
the large
welding current,the big welding pit
forming .In welding process ,pit is easy
to be a welding problem.So, the smaller
pit ,the best welding result .We call the
method padding pit is a crater fill up
process ,the current will be set as 60~70
％
value of total current .
Crater “No ”welding seam Crater “Yes ”welding seam
When finish welding
， torch switch can be switchover smaller current than welding
current
，
this calls “Yes ”crater. So, "No " means there is no such function for final
crater process, torch will be finished at normal welding current .