It's basically all in the summary. I'd like to use a smoothie for my upcoming Mostly-Printed CNC project, but I'd really like to take advantage of the dual endstop feature they have for their Marlin boards. The MPCNC has two stepper drivers per axis and they follow all the same gcode. If the two steppers get out of sync, you can issue a g28 and they home just like you'd expect, except each stepper only stops when it hits it's own endstop. The current guide to doubling steppers involves wiring two drivers to the same control pins. Easy enough, but I have a feeling that if I do that, both steppers will stop when the master stepper hits its respective endstop. I want them to home independently. Is there a module or an alternate firmware that supports or could be tricked into supporting this?

Thanks in advance!

Did you get this working? I am doing the same but having an issue on the Smoothieboard v1.0a 5 driver board. The M5 (epsilon) driver current is not being set or being set to max and causing a driver shutdown / stuttering. I have tried everything from recompiling with AXIS=5 CNC=1 to setting epsilon_current to 0.3 (so I can see that it changes). It is almost like the second digipot chip is not being set. I am so close to working but this is stopping everything. Even if I do not use the dual Endstop (still flip-flopping), I can't get it to work as a mirrored stepper because of the current issue. Any thoughts? I have alpha / beta/ gamma / delta / epsilon current being set in the config. All but delta / gamma have the enable / step / dir pins set per the stepper mirroring instructions.