Constant speed wire feeders are mainly used with which type of power source?

Constant speed wire feeders are mainly used with which type of power source?

• A. Rectifiers
• B. Inverters
• C. CV
• D. CC

Answer: (C)

Constant speed wire feeders deliver a fixed amount of filler metal each second, so keeping the arc length stable is key. A constant-voltage power source maintains the arc voltage essentially the same even as the current adjusts to the load. With the wire feed rate fixed, the current can rise or fall to balance the arc while the voltage stays steady, producing a stable arc and consistent deposition. Using a constant-current source would hold the current fixed, causing the arc length and voltage to vary as the wire moves and leading to an unstable weld. The hardware type (rectifier or inverter) is about how the power is converted, but the desirable pairing for a constant-speed feeder is a constant-voltage supply.

Constant speed wire feeders deliver a fixed amount of filler metal each second, so keeping the arc length stable is key. A constant-voltage power source maintains the arc voltage essentially the same even as the current adjusts to the load. With the wire feed rate fixed, the current can rise or fall to balance the arc while the voltage stays steady, producing a stable arc and consistent deposition. Using a constant-current source would hold the current fixed, causing the arc length and voltage to vary as the wire moves and leading to an unstable weld. The hardware type (rectifier or inverter) is about how the power is converted, but the desirable pairing for a constant-speed feeder is a constant-voltage supply.