Operation, Constant current – Lincoln Electric IM946 CRUISER Digital Tractor User Manual
Page 84
Cruiser™ Tractor
OPERATION
10-7
10-7
Current Held
Constant
and
Wire Feed
Speed Varied
and
Constant Arc Length
Maintained
AMPS
Extension
Heating = VIR Total Electrical
Stickout
V = Vir + Varc
Arc Length = Varc
Wire Feed Speed
Constant Current
• Operator presets current and desired voltage.
• The power source:
- Maintains a constant arc length
- Drives a constant current
- Synergetically controls WFS to maintain voltage at the desired set point.
• Arc length is proportional to voltage.
• Constant current is traditionally used for larger diameter wires and slower travel
speeds.
Figure 10-3 Constant Current
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