I am really happy with the boards! I didn't have any problems except
with the power supply. I wanted to run at 40v which is way too much
for the onboard 7805 - so I left off the regulator parts and used an
external filament transformer to run regulators for the logic.
At first I thought the design bordered on over-engineered because of
all the filtering and schmitt triggers, but it works perfectly without
any tinkering, never misses steps or gets extra steps, and so on. It
just didn't have any of the problems others have when building
stepper drivers.
The single-sided layout is great for my PCB milling setup, since the
board doesn't have to be flipped and realigned.
One day I intend to make a fourth board for my rotary axis and when
I do, I'll take a photo of it and put it on the site. Unfortunately
I didn't photo these three and they wouldn't be very photogenic the
way they're mounted in the box.
Thanks for making your design freely available! Besides changing the
DRC to make it work with my milling setup, I didn't make any changes
and don't have any suggestions for improvement.
Best regards,
Chris
Since Chris responded, I decided to update the board with a high voltage regulator. See the HV version.
