I'm a fabrication shop lead handling welding equipment orders for 9 years. I've personally made (and documented) 23 significant mistakes, totaling roughly $18,400 in wasted budget. Now I maintain our team's checklist to prevent others from repeating my errors. This FAQ covers what new buyers, small shops, and procurement folks actually ask me about ESAB gear, plasma cutters, weld cleaning, and refurbished machines.

What does a welding machine actually do?

A welding machine doesn't just 'melt metal.' It creates and controls an electric arc to fuse metals, usually with a filler wire or rod. MIG, TIG, stick, and flux-core each control that arc differently. The machine's job is to deliver stable voltage and amperage at a duty cycle you can live with. Most buyers focus on max amp rating and completely miss duty cycle and input power. In 2019, I bought a 200A MIG for 3/8-inch steel. Sounded fine. But at 200A it had a 25% duty cycle, so I couldn't run it continuously. That cost me a deadline and $600 in overtime. Check the duty cycle at the amperage you'll actually use—not the brochure number.

How do I choose an ESAB plasma cutter?

For ESAB plasma cutters, look past the 'max cut' number. Rated cut at a given travel speed matters more. Severance cut is what the torch can slice through in an emergency, not what you want to do all day. Also check input voltage, phase, and air requirements. I wish I had tracked consumable life more carefully from the start. What I can say anecdotally is that we burned through $700 in tips and electrodes in 2021 because our air wasn't dry enough. A $250 dryer would've paid for itself in a month. If you regularly cut 1/2-inch plate, buy a machine rated for 3/4-inch or better. Otherwise you'll likely run it at its limit and replace consumables constantly.

What's the deal with the ESAB welding logo?

The ESAB welding logo helps you identify the brand and product family, but it's not a condition report. I once looked at a used ESAB welder where the logo was bright and clean, but the serial plate was scratched and the manual was missing. That's a red flag. The 'if it has the logo, it's fine' thinking comes from an era when brand counterfeiting and rebadging were less common. Today, verify the serial number, ask for the original manual, and check with an authorized dealer if the price seems too good. The logo tells you who made it. It does not tell you how hard it's been run.

Do I need a welding cleaning machine?

A welding cleaning machine—often an electrolytic weld cleaner for stainless—removes heat tint, discoloration, and surface oxides after TIG welding. For carbon steel, you usually don't need one. For stainless food, dairy, or pharmaceutical work, it can be the difference between passing inspection and grinding for hours. I avoided buying one for years. Then we landed a stainless railing job in 2020, and I spent 6 hours with a grinder and Scotch-Brite. A cleaning machine would've cut that to maybe 45 minutes. If you do more than 10 stainless jobs a month, it's probably worth the investment. If you're a hobbyist, borrow one first.

Is a refurbished welding machine worth the risk?

Sometimes. Factory-refurbished or dealer-certified units with a warranty can be a solid value. The 'refurbished means junk' belief comes from an era when used gear was sold as-is with no support. That's changed. But no warranty, no service history, and no test report? That's risky. In September 2022, I bought a refurbished ESAB MIG to save $1,800. It ran fine for 14 months, then the board failed. Repair was $900. I still came out ahead, but the downtime hurt more than the money. Now I only buy refurbished if it includes at least a 6-month warranty and a load test under real welding conditions. I don't have hard data on failure rates, but based on our orders, a documented refurb is usually safer than a mystery used unit.

What mistakes do buyers make with ESAB machines?

Buying too much machine or too little. Ignoring input power. Assuming every torch and consumable is interchangeable. In 2018, I ordered a 480V machine for a shop that only had 240V. That mistake cost $1,200 in rewiring and a week of waiting. Also, don't chase the cheapest consumables. ESAB consumables are usually available, but third-party parts can be hit or miss. Most of these issues are preventable with a pre-purchase checklist. An informed buyer asks better questions and makes faster decisions. I'd rather spend 10 minutes explaining options than deal with mismatched expectations later.

What should I check before buying any welding machine?

Use this checklist: input voltage and phase; duty cycle at your target amperage; rated cut vs severance cut for plasma; consumable cost and availability; warranty and service network; air requirements for plasma; and safety gear. Under OSHA's welding standard (29 CFR 1910.252), you also need proper ventilation, eye protection, and fire prevention based on the process and location. That's not optional. Even after choosing the right machine, I kept second-guessing. What if the duty cycle wasn't enough? What if the consumables were backordered? The two weeks until first production run were stressful. But the checklist caught two problems before they cost us money. If you're unsure, call an authorized ESAB dealer and ask for the manual before you buy.