Miller Millermatic Spoolmate 185 Spool Gun Owner's Manual page 14

2-3. Welding Power Source Duty Cycle And Overheating
60% Duty Cycle At 160 Amperes
6 Minutes Welding
Overheating
2-4. MIG 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-1322 Page 10
4 Minutes Resting
0
15
Minutes
.023 To .045 in (0.6 To 1.1 mm)
Hard Or Flux Cored Wires
100% Duty Cycle At 150 Amperes
Using CO
2
100% Duty Cycle At 120 Amperes
Using Mixed Gases
Continuous 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
warranty.
30% Duty Cycle At 200 Amperes
3 Minutes Welding
A or V
OR
Reduce Duty Cycle
.023 To .045 in (0.6 To 1.1 mm) Hard Or Flux Cored Wires
60% Duty Cycle At 200 Amperes
Using CO
60% Duty Cycle At 150 Amperes
Using Mixed Gases
6 Minutes Welding
unit and void
7 Minutes Resting
duty1 4/95 – 200 060
warn7.1 8/93
2
4 Minutes Resting
SB1.1 8/93