Hobart Welding Products 125 Troubleshooting − Burn-Through, Troubleshooting − Waviness Of Bead

9-14. Troubleshooting − Burn-Through

Burn-Through − weld metal melting completely through base metal resulting in holes where no metal remains.

S-0640

Possible Causes	Corrective Actions
Excessive heat input.	Select lower voltage range and reduce wire feed speed.
	Increase and/or maintain steady travel speed.

9-15. Troubleshooting − Waviness Of Bead

Waviness Of Bead − weld metal that is not parallel and does not cover joint formed by base metal.

S-0641

Possible Causes	Corrective Actions
Welding wire extends too far out of nozzle.	Be sure welding wire extends not more than 1/2 in. (13 mm) beyond nozzle.
Unsteady hand.	Support hand on solid surface or use two hands.

9-16. Troubleshooting − Distortion

			Distortion − contraction of weld metal during welding that forces
			base metal to move.
		Base metal moves
		in the direction of
		the weld bead.
			S-0642
	Possible Causes		Corrective Actions
Excessive heat input.			Use restraint (clamp) to hold base metal in position.
			Make tack welds along joint before starting welding operation.
			Select lower voltage range and/or reduce wire feed speed.
			Increase travel speed.
			Weld in small segments and allow cooling between welds.

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