. A complete Parts List is available at www.MillerWelds.com
OM-281426 Page 13
4-9. Duty Cycle And Overheating For MIG (GMAW)
Duty Cycle is percentage of 10
minutes that unit can weld at rated
load without overheating.
If unit overheats, output stops. Wait
fifteen minutes for unit to cool.
Reduce amperage or duty cycle
before starting to weld again.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
4 Minutes Welding 6 Minutes Resting
2 Minutes Welding 8 Minutes Resting
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 − Ref. Duty Cycle Charts
60% Duty Cycle At 105A
120V Input
240V Input
20% Duty Cycle At 200A
40% Duty Cycle At 170A
6 Minutes Welding 4 Minutes Resting
0
20
40
60
80
100
120
140
160
180
200
220
240
10 100
Output Amperes
% Duty Cycle
20
50
240VAC
120VAC 20A
120VAC 15A
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