I recently had a problem with a Kmotion board w/ dual Snapamps where
the program would run but when M2 was called, the Snapamps would shut
down and power had to be cycled. Thanks to Tom, the problem was traced
to M2 being linked to other M codes that weren't being used (in this
case M5 spindle stop). By setting the programmable M codes in Tool
Setup to do nothing, the problem was solved.