Tweco 175 TE Arcmaster - Manual (Page 33)

oPeration arc master 175 te
Manual 0- 5116 4-5 Operation
4.06 GTAW Electrode Polarity
Connect the TIG torch to the "-" Negative Output Terminal and the work lead to the "+" Positive Output Terminal
for direct current straight polarity. Direct current straight polarity is the most widely used polarity for DC TIG
welding. It allows limited wear of the electrode since 70% of the heat is concentrated at the work piece.
4.07 Guide for Selecting Filler Wire
Filler Wire Diameter DC Current (Amps)
.040” (1.0mm) 30-60
1/16” (1.6mm) 60-115
3/32” (2.4mm) 100-165
1/8” (3.2mm) 135-175
4.08 Tungsten Electrode Current Ranges
Electrode Diameter DC Current
.040” (1.0mm) 25 - 85
1/16” (1.6mm) 50 - 160
4.09 Shielding Gas Selection
Alloy Shielding Gas
Carbon Steel Welding Argon
Stainless Steel Welding Argon
Nickel Alloy Welding Argon
Copper Welding Argon
Titanium Welding Argon
4.10 Tungsten Electrode Types
Electrode Type
(Ground Finish)
Welding Application Features Colour
Code
Thoriated 2% DC welding of mild steel, stainless
steel and copper.
Excellent arc starting, long life, high
current carrying capacity.
Red
Ceriated 2% AC & DC welding of mild steel,
stainless steel, copper, aluminum,
magnesium and their alloys.
Longer life, more stable arc, easier
starting, wider current range,
narrower & more concentrated arc.
Grey