Applications Engineering Q & A

2020-12-24

Q: I would like to do gas metal arc welding on steel and aluminum, using a small engine drive.
I am thinking about adding gas tungsten arc welding at a later date. However, I don’t want to
spend the money for a Trailblazer 251 NT.What is the least expen

Burnback Wire Stubbing Porosity

2020-12-24

David Almy, Welding Engineer ― Miller Electric Mfg. Co.
Q: I have gas flow from the gun, but not a clean weld. How can I solve this?
A: Porosity and black welds indicate poor gas coverage or contamination.