Welding Power Source Duty Cycle And Overheating; Welding Gun Duty Cycle And Overheating - Miller Electric Millermatic Vintage M-25 Gun Owner's Manual

2-3. Welding Power Source Duty Cycle And Overheating

Overheating

2-4. Welding Gun Duty Cycle And Overheating

CAUTION
WELDING LONGER THAN RATED DUTY CYCLE can damage gun and void warranty.
Do not weld at rated load longer than shown below.
Using gasless flux cored wire reduces gun duty cycle.
Definition
0
10
Minutes
Duty Cycle is percentage of 10
minutes that gun can weld at
rated load without overheating.
OM-1311 Page 10
60% Duty Cycle At 200 Amperes
6 Minutes Welding
0
Minutes
.023 To .045 in (0.6 To 1.1 mm)
Hard Or Flux Cored Wires
100% Duty Cycle At 200 Amperes
Using CO
2
100% Duty Cycle At 150 Amperes
Using Mixed Gases
Continuous Welding
4 Minutes Resting
15
OR
Reduce Duty Cycle
.023 To .045 in (0.6 To 1.1 mm) Hard Or Flux Cored Wires
60% Duty Cycle At 300 Amperes
60% Duty Cycle At 200 Amperes
6 Minutes Welding
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, thermostat(s)
opens, output stops, and cooling
fan runs. Wait fifteen minutes for
unit to cool. Reduce amperage or
voltage, or duty cycle before
welding.
Y Exceeding duty cycle can
damage unit and void war-
ranty.
A or V
duty1 4/95 – 150 215
warn7.1 8/93
Using CO
2
Using Mixed Gases
4 Minutes Resting
SB1.1 8/93