RE: [CAD_CAM_EDM_DRO] Re:Home Switches

On fitting home switches to our router table, I notice that each time
I home the table - the X and Y readings differ greatly, some times upto + -
0.5 mm. Seldom never going to zero. Slowing the home traverse speed seems to
make little difference.

I would have expected there to be some differnces caused by backlash etc but
not as much as I am getting.

I have used good quality lever type micro switches, but wonder if I am
suffering from switch bounce or just the mechanical properties of a micro
switch. Would I be better using a slotted opto coupler to eliminate
mechanical tolerences or any other method ?

The table is being driven with Rutex Amps and The Desk CNC sofware and
controller.

Any advice would be appreciated

Rgds to all

Dave Fisher