I know there is already a plethera of posts out there for creating a CNC machine with a Pi. However..........
I have compiled my own kernel and got Linuxcnc EMC2 working on my Pi. However I am new to stepper motors and drive/step pins. I have 3 x Nema17 4 wire bipolar motors and 3 x HG7881 H-Bridge devices. Linuxcnc will only allow the use of 2 Pins on the Pi for step and drive. Could you please let me know how to wire up the Pi to H-Bidge to Nema17? I am lost on the A1,A2,B1,B2 sequencing and how that fits in with a single drive and single step pin on the Pi.
This is the last link in my chain before starting a physical machine build I really hope someone can help me? Thanks in advance!