Frequently asked questions
What is the best MIG setting for mild steel?
There is no single best number. Start with the welder door chart or manufacturer chart for wire diameter, gas and thickness, then tune for joint and position.
Should I use .030 or .035 wire?
.030 is common for lighter material and lower-output machines; .035 is common for general fabrication and thicker work. Machine capacity and procedure matter.
Does voltage control arc length?
In constant-voltage MIG, voltage strongly affects arc length/shape while wire-feed speed strongly affects amperage/current demand.