Hood, After looking at everything I considered noise.  Could you expound on the 'debounce' a bit.
Thanks,

Config menu then General Config and top right you will see two debounce settings, one is the Interval and the other is for the index pulse only. It is the Debounce Interval you want to change as that affects all inputs other than the Index. What it does is make Mach delay acting on signals shorter  than the  time you set, noise is usually erratic so setting 2000 should normally be more than enough for Mach to distinguish between noise and a true signal.

Hood