I'm making a coreXY printer with 5 print heads. That's 10 steppers total. I originally planned to buy the Duet2+Duex5 for 10 drivers, but now there's a bigger and better Duet3 board out there. 3 is greater than 2, so certainly it's superior in every way!
It ain't necessarily so. While the Duet3-6HC and 3HC expansion are great, I find myself with one less driver than the previous generation. No worries, I thought, at least there's those extra expansion pins. Turns out they don't have those on the Duet3.
So now I'm scrambling to figure out how I can drive this motor without buying another $150 expansion board. Can I somehow connect an external stepper driver to a GPIO pin? Could I maybe drive it through the SBC? Should I just return this and get a Duet2?