Router has died. Need Advise Please.

[Clive S]

I have used cy cable 1mm 4 core from the inverter to the spindle, 3 cores are for driving the spindle and the fourth core is to earth (my spindle has a 4 pin socket on it) on mine pin 4 was not connected to anywhere, I took the top off and soldered a wire from pin 4 to one of the socket mounting bolts on the spindle (I had to put a longer bolt in and then use a nut on the inside).
The shield on the cy cable is only earthed and the inverter end.
The mains cable to the inverter only need 1mm standard 3 core flex. ..Clive

[Jonathan]

The mains cable to the inverter only need 1mm standard 3 core flex. ..Clive

Additionally, since we know that 3-phase power transmission is more efficient than single phase, that shows we can use a bit less than 1mm^2 cable from the inverter to the spindle. However the cost difference is likely to be negligible over such a small length, so I wouldn't worry too much. I used the same 1.5mm^2 4-core CY cable for my stepper motors and spindle, simply because at the time obtaining a reel of that cable was more cost effective than getting a smaller length of two.

[Clive S]

Additionally, since we know that 3-phase power transmission is more efficient than single phase, that shows we can use a bit less than 1mm^2 cable from the inverter to the spindle. However the cost difference is likely to be negligible over such a small length, so I wouldn't worry too much. I used the same 1.5mm^2 4-core CY cable for my stepper motors and spindle, simply because at the time obtaining a reel of that cable was more cost effective than getting a smaller length of two.

I have use 1mm for the spindle and steppers as they are only 3-4mtr long and fit the plugs better .. Clive