Stubbing is caused by excessive which factor?

Stubbing is caused by excessive which factor?

• A. Inductance.
• B. Voltage.
• C. Resistance.
• D. Wire Feed Speed.

Answer: (D)

Stubbing happens when the wire feed speed is set too high for the welding conditions. In the short‑circuit transfer of MIG welding, the electrode wire continually advances into the arc and into the molten puddle. If you push the wire too fast, the arc can’t reestablish smoothly after each contact, so the wire repeatedly bites into the puddle, causing a rapid sequence of short circuits. That produces an irregular, stuttering weld bead with more spatter. To fix it, back off the wire feed speed to match the current and voltage so the arc can stay stable. Inductance, voltage, and resistance influence how stable the arc feels, but the direct cause of stubbing is excessive wire feed speed.

Stubbing happens when the wire feed speed is set too high for the welding conditions. In the short‑circuit transfer of MIG welding, the electrode wire continually advances into the arc and into the molten puddle. If you push the wire too fast, the arc can’t reestablish smoothly after each contact, so the wire repeatedly bites into the puddle, causing a rapid sequence of short circuits. That produces an irregular, stuttering weld bead with more spatter. To fix it, back off the wire feed speed to match the current and voltage so the arc can stay stable.

Inductance, voltage, and resistance influence how stable the arc feels, but the direct cause of stubbing is excessive wire feed speed.