Quote Originally Posted by Al_The_Man View Post
Is this a VFD spindle?
There should be a way to set one of the VFD outputs for up-to-speed signal, whenever a M3/M4 is issued, it waits for the up to speed signal input, this is how it is done on commercial machines.
Al.
Sorry to resurrect an old sleeping thread but I can't find anything on how to implement this 'wait for spindle up to speed' feature.

Is this a Mach3 feature I haven't run across yet?

Or after hooking up a signal wire from the VFD to a CNC controller input do I have to manually code a custom M3.m1s macro? Or perchance is there an example macro laying around somewhere that someone could share?