M function feed hold tell switch trips?

[D.D.Machine]

I`m working on a retro on a shaper and need to get the Z axis to hold on a M function until it gets to the back of the stroke and then feed down in Z when it trips a switch and then hold until the switch is hit again.

how would I go about setting up turbo cnc to do this?
is it as simple as hooking up one of the inputs to the switch and then just using a M1 ?

Thanks
Duffy

[D.D.Machine]

after looking at there website it looks like there ZBreak might do it?