Originally Posted by
DSpeck
The spindle already has an index wheel, and an encoder wheel (100/rev, if it's like mine). You can re-use the spindle encoder stuff. It's optical, no need for prox. You can use a C3 board(from CNC4PC) for connecting the spindle index to Mach3. Mach3 only takes a single pulse/rev for threading. If you are using LinuxCNC/Machinekit, I think you have to connect all the encoders. I don't know if you have to add two more C3 boards, or if there is a more economical solution for connecting them. The answer to this is of strong interest to me, as I have several small CNC lathes waiting for control upgrades. :)