. A complete Parts List is available at www.MillerWelds.com
OM-283935 Page 15
4-11. Duty Cycle And Overheating For TIG (GTAW)
Duty Cycle is percentage of 10
minutes that unit can weld at rated
load without overheating.
If unit overheats, output stops. Wait
10 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
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 / 278660
60% Duty Cycle At 180 A
6 Minutes Welding 4 Minutes Resting
40% Duty Cycle At 210 A
4-12. Static Characteristics
The static (output) characteristics of the welding power source can be described as flat during the GMAW process and drooping during the
SMAW and GTAW processes. Static characteristics are also affected by control settings (including software), electrode, shielding gas, weld-
ment material, and other factors. Contact the factory for specific information on the static characteristics of the welding power source.