What is 'stick‑out' and how does it affect arc stability and spatter in GMAW?

Study for the Gas Metal Arc Welding Exam, including GMAW, FCAW, and MCAW methods. Use flashcards and multiple choice questions with hints and explanations for effective learning. Get ready for your welding certification!

Stick-out is the length of wire extending from the contact tip into the arc region. This length changes the electrical resistance in the wire path: a longer stick-out adds resistance, which causes the arc current at the tip to drop. With less current reaching the arc, the heat and stabil ity of the arc decrease, making the metal transfer more erratic and increasing spatter. Shorter stick-out reduces this resistance, delivering more current to the arc and improving stability, which helps keep spatter down. But if the stick-out is too short, the wire tip can intrude into the weld pool or contact tip area, leading to tip obstruction, burnback, or feeding issues. So the described relationship—longer stick-out raises resistance and spatter while shorter stick-out improves stability but risks tip obstruction—best captures how stick-out affects arc behavior in GMAW.