Which bead condition may be caused by an unsteady hand, a worn contact tip, too much stick out, voltage setting too high, and uneven travel speeds?

Which bead condition may be caused by an unsteady hand, a worn contact tip, too much stick out, voltage setting too high, and uneven travel speeds?

• A. Distorted or uneven
• B. Spatter
• C. Cracking
• D. Porosity

Answer: (A)

The bead appearance is driven by how stable your arc and heat input are. When the hand is unsteady, the arc wanders, so the deposited metal isn’t uniform in width or height, producing a bead that looks irregular. A worn contact tip destabilizes the arc, giving inconsistent current to the wire and erratic deposition, which also makes the bead uneven. Too much stick-out lengthen the arc, reducing current density and increasing heat input, which can widen and distort the bead. A voltage setting that’s too high lengthens the arc and adds heat, promoting a bloated, less uniform bead. Uneven travel speeds cause changes in deposition rate along the bead, creating sections that are too thick or too thin and a generally distorted contour. Taken together, these factors most directly produce a distorted or uneven bead, rather than spatter, cracking, or porosity, which stem from different causes. If you see a distorted bead, check technique and equipment: steady your hand, use the proper stick-out, replace a worn tip, set the voltage appropriately, and maintain steady travel speed.

The bead appearance is driven by how stable your arc and heat input are. When the hand is unsteady, the arc wanders, so the deposited metal isn’t uniform in width or height, producing a bead that looks irregular. A worn contact tip destabilizes the arc, giving inconsistent current to the wire and erratic deposition, which also makes the bead uneven. Too much stick-out lengthen the arc, reducing current density and increasing heat input, which can widen and distort the bead. A voltage setting that’s too high lengthens the arc and adds heat, promoting a bloated, less uniform bead. Uneven travel speeds cause changes in deposition rate along the bead, creating sections that are too thick or too thin and a generally distorted contour. Taken together, these factors most directly produce a distorted or uneven bead, rather than spatter, cracking, or porosity, which stem from different causes. If you see a distorted bead, check technique and equipment: steady your hand, use the proper stick-out, replace a worn tip, set the voltage appropriately, and maintain steady travel speed.