Quote Originally Posted by JAZZCNC View Post
Yes, 1mm will be more than enough.



No that's not correct, Dir and Step are low current INPUT signals, they don't send anything out. This is the same for steppers or Servos.

It's the Drive OUTPUTS, usually marked A+ A- B+ B- on a stepper or U V W on a servo that are the high current wires. Wire size will depend on motor size and cable length but for a typical 3nm stepper with 3 to 5Mtr cable lengths then 0.75mm/2 to 1mm/2 works fine, don't need anything larger than that.

For smaller servo's 200w to 600w then 1mm/2 to 1.5mm/2 will work, again depending on cable length. For larger servo's it will be anywhere between 1.5mm/2 to 4mm/2.
There are no driver to motor cables. It's all built in.
There's just:
3 wires for main DC power incl gnd.
10 Wires for controls (step/dir) etc.
5 wires for RS232.
That's it.

So 14AWG 3 or 4 core for main and a DB15 for the rest. That'll do

https://www.ebay.co.uk/itm/180W-3000...yABEgLdtvD_BwE

I would NOT fancy running these with flood cooling that's for sure :)