Just to get this clear.
I have used CY 4 Core 1.5mm/2 cable from the VFD to the spindle, But I need to connect the screen to earth not just at the VFD but also at the spindle.
I will fit CY 4 Core 0.75mm/2 cable from the drivers to the stepper motors also the screen will be earthed at the driver end at a star end earth point and at the stepper motor end.
I will fit CY 2 Core 0.75mm/2 cable from the breakout board to the limit switches with the screen earthed at the breakout board, but the screen not connected at the switches.
I could use CY 4Core cable between the breakout board and the stepper motor drivers also the screen earthed at both ends.
All ends will be joined to a common earth point in side the CNC control unit.
Should I also run a earth cable between the control box and the CNC machine?
And I will get some sleeving to make the ends tidy, I like that idea.