This used to be one of the oldest schemes I know of
used by Pinguin CNC - EMC.
All positiv sides on one Pin
All negative sides on a second Pin
All home and Probe signals on a 3rd Pin
All normaly open switches.
This will support a unlimited number of axses and uses only 3 Pins.
Unfortunatly a lot of Pc Controller programs do not support this.
I guess the Programmers did not fully understand the benefits
of this kind of arrangement.
Many went with switches assigned to each axes wich requires more Pins
when they realised this they also made them act as home swiches to
conserve Pins needed, also this required special handling in software that
will require another Pin if Probeing is allso needed.
Once a Software is released it is unlikely this could be changed.
I really like your Idea about a override swich this would take it out of
the hand of the software entirely.
In the end however you will have to conform to the standards used by
the software you want to run.
One way they can assure having loyal customers. :-)  |