Tweco FP-165 Mini MIG Portable MIG Welder - Manual (Page 40)

OpERATION FIREpOwER Fp-125, 135, 165
Operation 4-9 Manual 0-5123
4.12 Reference Tables
The following tables are provided as user aids when performing MIG or FLUX CORED welding.
Type of Gas Typical Mixtures Primary Uses
Carbon Dioxide (CO2) Mild and low alloy steels
Argon (Ar) - Carbon Dioxide (CO2) 75% Ar – 25% CO2 Mild and low alloy steelsStainless Steel
Argon (Ar)
Aluminum
Table 4-1: Type of Gas
Result Desired Welding Variable
Arc
Voltage
Welding Current
(wire speed)
Travel
Speed Nozzle Angle Stick out
Wire
size
Gas
Type
Deeper
Penetration 1 Increase
3 Trailing Max
25° 2 Decrease
5 Smaller
(*) 4 CO
2
Shallower
Penetration 1 Decrease 3 Leading 2 Increase 5 Larger
4 Ar CO
2
mix
Larger Bead 1 Increase 2 Decrease
3 Increase
(*)
Smaller Bead 2 Decrease 2 Increase
3 Decrease
(*)
Higher Narrower
Bead 1 Decrease 2 Trailing 3 Increase
Flatter Wider
Bead 1 Increase 2 90° or Leading 3 Decrease
Faster
Deposition Rate 1 Increase
2 Increase
(*) 3 Smaller
Slower
Deposition Rate 1 Decrease
2 Decrease
(*) 3 Larger
Key: (1) First Choice, (2) Second Choice, (3) Third Choice, (4) Fourth Choice, (5) Fifth Choice
Table 4-2: Welding Variables
NOTE
Same adjustment is required for wire feed speed.
* When these variables are changed, the wire feed speed must be adjusted so that the welding current remains con-
stant. See DEPOSITION RATE in the WELDING VARIABLES section. This change is especially helpful on materials of
20 gauge (.04” 1mm approximately) and smaller in thickness.