Longevity MIGWELD 250 MP User Manual

Page 44

MIGWELD 250 MP

• Fill the crater at the end of the weld to avoid a crack. One way to do this is to
dwell in the weld pool for a second at the end of the weld.

• Why Choose A Spool Gun?

• Spool Guns are recommended to be used while welding aluminum. There are

many benefits to using a spool gun on aluminum over your standard MIG torch,
which include:

• Using a spool gun prevents you from contaminating aluminum with a gun that

had been used with previous metals, ensuring the highest quality weld.

• Aluminum is more delicate of a metal. Spool guns have a far less distance to be

fed through, which means less chances of the aluminum kinking.

• Aluminum needs to expand as it comes out of the contact tip. The diameter of a

spool gun contact tip is much bigger than that of a MIG gun, giving the aluminum
the room it needs.

• Self-Shielded Flux Cored Welding Tips

• Pull torch away from you as you weld (Pull gun technique)

• Store your wire in a dry place free of contaminates

• Use a chipping hammer and wire brush to remove slag layer after weld is
complete

• You do not need shielding gas—Great for welding outdoors!

• You won’t be able to weld as thin of metals than would with normal MIG
welding.