CNC router from industial scrap

The VFD is controlled as standard analog 0-10V, connected with shielded wires, shield grounding on the drive side. I tried different grounding options, added ferrite rings, changed different wires, I thought it was some kind of noise problem, but no luck at all.

If the VFD has a large capacitor on the analog voltage input, it could
possibly cause instability and high frequency oscillation on the analog output,
so one thing to try is adding a small resistor in series with the 7I76E SPINOUT pin
(say 220 Ohm or so)

Trying with 120, 180 and 330 Ohm resistor, nothing change.

I haven't posted anything for a long time, but I haven't been idle, and I've been able to do some interesting projects over this time.
The first project was a deep modification of a computer case with custom water cooling system. It was a very challenging job for me, many things I did for the first time. Starting with the general idea, the design, the making of all the details and the final assembly I did by myself. I gained a ton of experience from that case and now I'm not afraid to take on complex projects. 
   
 
More pictures here -  ibb.co/album/4snsH2
The second project is a 5-axis machine to make wax models for jewelry. Similarly, all design, manufacturing, assembly and adjustment was done completely by myself.