[basilevscom]

I do not any noise, all wires in the machine are shielded.

My action:
1. I turn on the computer and the machine.
2 I check the movement on all axes manually from the program and perform HOME procedure - everything works!
3 I turn off all power to the machine except for the controller.
4. I upload the file, click run and get an error "controller disconnected" when the first G1 movement is performed - always happens with a "bad" cable

Thus, I claim that the power supply to the spindle or the power supply to the driver of the motors does not have any effect on the occurrence of this error! I've made a lot of electronics and machine tools including, I feel that the problem is not the noise. Why does one 0.75 m cable work and another exactly the same length of 1.2 m does not?

[basilevscom]

One more note may be important!
After this error, if I do not turn off the power to the controller and disconnect the USB cord, then after connecting Usb cable again, Windows can not identify the device as a CNC controller, it will send an "unknown device".
To continue I have to power off the controller and turn it on again and then connect the USB cable.

I have a video of how everything is happening, I will post it soon...