
(followup: I have now measured more welding currents — blog article)
It will be recalled (blog article) that I recently took a stick-welding course. I also recently purchased an inexpensive inverter-type welding machine (shown at right), and a neighbor of mine also purchased an inexpensive inverter-type welding machine.
Each welding machine has a rotary knob for picking the welding current. And each welding machine has a three-digit numerical display. The question that arose for my neighbor and me was, can we safely assume that the number in the display will be the number of amperes of actual welding current? The answer turned out to be “no”. Continue reading “Measuring welding currents”