I have a C3 pulse index card for my G0602 (working great), and am going to add a second spindle sensor so LinuxCNC sees both an index pulse and a phase pulse. I really have no idea why I'm using the C3, other than everyone else does it.
What exactly does this card do, and why can't I just run the sensor right to my breakout board (mine is a C11)? Would running the sensor straight to the BOB input (instead of the C3) not work? Or is it just not ideal?
I don't mind buying a second C3, just trying to understand its function.
Thanks.