Duty Cycle And Overheating For Stick (Smaw); Static Characteristics - Miller Multimatic 220 Owner's Manual

4-11. Duty Cycle And Overheating For Stick (SMAW)

1-6. Duty Cycle And Overheating For Stick (SMAW)
240
220
200
180
160
140
120V 20A
120
100
80
60
40
120V 15A
20
0
10
120V Input: 40% Duty Cycle At 90A
240V Input: 20% Duty Cycle At 185A
Overheating

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, weldment
material, and other factors. Contact the factory for specific information on the static characteristics of the welding power source.
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Complete Parts List is available at www.MillerWelds.com
A complete Parts List is available at www.MillerWelds.com
240V
50
20
% Duty Cycle
0
Minutes
Duty Cycle is percentage of 10 minutes that
unit
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.
100
15
OR
Reduce Duty Cycle
can weld at rated load
A or V
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without