Voltage drop during cutting(Solved? Thought to be IHS connection: Maybe not)

[ChelanJim]

What plasma cutter are you using? Are you using RAW or DIVIDED voltage thru the VIM box?

The only other thing I might suggest is this USB Isolator. It might be a hail Mary.

Bevel on holes - Mild Steel, thicker materials

[ground-test] This test should read zero or almost zero. Test from the plasma table frame to the outside of the printer-style USB plug outside shield. (upload://5D8fjn4zHInuHAvK9wlce94kCLK.jpeg) Check out CNC USB Isolator 1Kv -(Bullet Proof USB) UC-100 USB, USB Ground Loop Eliminator on eBay! The ground loop isolator goes between the computer USB and the control box USB input.

BigDaddy knows the guy (who makes and sells this device) and respects him skills/knowledge.

I would definitely use the USB cable that Langmuir supplied with the table, certainly nothing exceeding 10 feet while you work thru this issue. And no extension cables on the THC.