Y with A as slave axis won't work

[cncwoodprojects]

Hi and first thanks for your help :)

I read this post and i start to learn how to wire csmio IP-M and i have some doubts (here i post only the Slave axis and i put questions in other posts).

In my Arduino grbl i never used slave ports i only put a cable between the to drivers for connect one to other and i only use one output.
Now i see the ip-m have slave option, the real question is:

- It's really necessary use the slave port? or i can use the old wiring system because is the same?


Thanks for your time :)