Sorry to bring an old thread back from the dead, but seemed to be the logical place to post.

I finally finished my upgrade to an IP-A, but need to add controls in the SimCNC software for a second spindle.

I'd like to use M13/14/15 and can see I need to add the M code macros, and also assign in Device script, but can't see how to tie that to the relevant outputs.

Does anyone have an idea how this may be achieved?

regards, Oz