yes ive tried shielding the cable, computer, laptop, etc. Even used sheet metal trying some faraday shield. And it helps alot, but I noticed glitches and issues even without running the plasma cutter. I first used grbl on my very first cnc mill and there was random times it would move and not stop. Again no plasma cutting was done with that, or any other interferance. Simple movements and other random things causes unreliability, which any type is too much for a CNC machine. Cutting tools can easily cost hundreths of dollars, and the parts you are cutting can cost much more especially with lots of time and effort to cut it just to lose it all midway. FluidNC is simply much better in every way.

@@Rowow that's very strange to me because i use grbl exclusively for many years with no problems. The only problem i ever had was with the limit switches. The magnetic router induced current in the gpio wires to the switch and caused false limit switch presses. I fixed it easily by adding a 10uF capacitor at the switch (not near the arduino). It works flawless. I wonder what the difference between your setup and mine is?! I have the arduino uno 3' away from the cnc. Only the limit switches and stepper motor cables go to the cnc.

@@TheRainHarvester I was using a laptop and maybe it wasnt properly grounded. But control over USB is annoying. You still need another computer. Much better to have the code stored and ran on the board itself. When you have many cnc machines it makes operating them so much easier. I can run them anywhere I want to from any device. simply need to change the IP to swap between them. the only time I dont suggest it is for high precision machining where a MPG controller is needed and especially for lathe indexing for threading

@@Rowow yeah it's s good at strategy. Does fluid nc still have emergency stop/pause button? Can you still broadcast a move request while the machine is cutting? Or does wifi get interference ? What is the issue with lathe thread indexing on fluid nc?

@@TheRainHarvester yes and you can wire a switch to it cause obviously WiFi may time out or whatever

great question but sadly I havent set that up so im not sure. If I set up THC ill make a video on it though

👍

I'm surprised the plasma doesn't interfere with the radio signal of esp32! Why not?!

wifi has much better error correcting than USB. Also all of the code is computed and ran on the board itself. The only time important data is transferred is before you run the machine, aka when the plasma is off. It stores the file on a SD card on board and computes it from there

@@Rowow my arduino is located very close to a 1990s xp laptop. It has a whopping 512k of memory but still boots xp faster than others boot win7,8,10 !

@@Rowow that makes sense. Wifi only for transmitting the gcode beforehand. So its just motor wires out? What motor controller chip? Do you have limit switches?

@@TheRainHarvester You can add motor controller chips similar to a 3d printer board however it has the option which I use for external stepper motor drivers. I dont use limit switches as its alot easier to zero the machine to the workpiece

Plus a monitor, keyboard, mouse. If you can find a PC locally and are willing to waste 1-2 hours driving to and from to pick it up. And dealing with damage and other issues, most likely needing to buy a SSD to replace the failing harddrive, or ram/etc thats causing issues for the PC to boot