Volt/Ampere Curve - Constant Current (Cc) Power Source; Duty Cycle - Power Source For Constant Current (Cc) Welding - Miller Arc Stud Welding Fundamentals Manual

NOTE

2-7. Volt/Ampere Curve - Constant Current (CC) Power Source

2-8. Duty Cycle - Power Source For Constant Current (CC) Welding

Explanation of charts:
A nominal voltage for stud welding is 30 volts dc.
To determine the duty cycle of stud welding while using a constant current (CC) power source:
D A horizontal dotted line is extended from 30 volts in section 2-7.
D The 600 amps shown in section 2-7 is then used in section 2-8 to determine the duty cycle.
D The result is 26% duty cycle.
The charts in (Sections2-7 and 2-8) show the voltage/amperage output and duty
cycle of a stud welding power source that uses an external device for setting
amperage and time.
80
70
60
50
40
30
Min.
20
10
0 100 200 300
700
600
500
400
300
250
200
150
20 25 30 35
Max.
400 500 600
DC AMPERES
RATED OUTPUT
40 50 60 70
% DUTY CYCLE
700 800
80 90 100
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