Miller Electric 172 M-10 Gun manual Welding Power Source Duty Cycle And Overheating, Definition

2-3. Welding Power Source Duty Cycle And Overheating

	300
	250
	200
AMPERES	150
	100
DC	75
	50

10 15 20 25 30 40 50 60 70 80 100

% DUTY CYCLE

30% Duty Cycle At 130 Amperes

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 duty cycle before welding.

YExceeding duty cycle can damage unit or gun and void warranty.

3 Minutes Welding 7 Minutes Resting

Overheating

0

A or V

15

OR

Reduce Duty Cycle

Minutes

duty1 4/95 – SB-180 844

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.	warn7.1 8/93

Definition

0

10

Minutes

Duty Cycle is percentage of 10 minutes that gun can weld at rated load without overheating.

.023 To .045 in (0.6 To 1.1 mm)

Hard Or Flux Cored Wires

100% Duty Cycle At 100 Amperes

Using CO2

Continuous Welding

.023 To .045 in (0.6 To 1.1 mm) Hard Or Flux Cored Wires

60% Duty Cycle At 100 Amperes

Using Mixed Gases

6 Minutes Welding	4 Minutes Resting
	SB1.1 8/93

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