What does DV mode mean?
Is MIG welding constant voltage?
MIG welding power sources have what is known as a ‘constant voltage’ output characteristic (Fig. 1). The arc voltage is established by setting the output voltage on the power supply. This means that the wire feed speed can be used to control the welding current.
What is the difference between constant current and constant voltage?
The term “constant” is relative. A CC power source will maintain current at a relatively constant level, regardless of fairly large changes in voltage, while a CV power source will maintain voltage at a relatively constant level, regardless of fairly large changes in current.
What is constant current mode?
In constant current mode, also known as current-controlled mode, the power supply behaves like a current source, holding the current flowing through the output terminals constant while the output voltage varies depending on load conditions.
What is the maximum current for an LED?
The maximum current is shown on LED datasheets, for example 20 mA (0.020A) is common for many small LEDs. Many circuits operate LEDs at less than the recommended maximum current, to save power, to permit the use of a standard resistor value, or to reduce brightness.