DIY CNC Milling Machine From Scratch

[totts]

So disconnected my USB shield from one end (control end) ran a program only moved 0.3mm instead of the 1.2mm, but found the resistance was high in the earth, the continuity on my multi meter was struggling to pick it up, I checked continuity through my control cabinet earth, which in turn is connected to earth ring main, pc and the USB again, managed to my continuity back, will run a program agin and hopefully will get that 0.3mm back!


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[Boyan Silyavski]

Today i cured all my problems by connecting my VFD ground directly to metal box with electronics inside. Incredible but yes.

As i read that Dean suggested no ground from box to PC, i remembered that when was desperate i did exactly that. Took off ground from PC side and spindle started rising and slowing speed. I said to myself that things are getting worse like that, but as the ground to box was still connected i started touching it around. Touched to ground on socket and was better, touched to PC box- better, then accidentally touched to VFD ground and voila, all was fine. They have common ground at socket, but cable between boxes cured all problems.