Lincoln Electric IM946 CRUISER Digital Tractor - Manual (Page 85)

Cruiser™ Tractor
OPERATION
10-8 10-8
Current Varied
and
Wire Feed
Held Constant
and
Maintain Constant
Arc Length
AMPS
Extension
Heating = VIR Total Electrical
Stickout
V = Vir + Varc
Arc Length = Varc
Wire Feed Speed
Constant Voltage
• Operator presets wire feed speed and desired voltage.
• The power source:
- Maintains a constant arc length
- Commands constant wire feed speed
- Synergetically controls current to maintain voltage at the desired set point.
• Arc length is proportional to voltage.
• Constant voltage is traditionally used for smaller diameter wires and faster travel
speeds.
Figure 10-4 Constant Voltage