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finally i get time to try the fix. I tried with one buffer for each "Step" pin an with two buffers for each.

Without fix i get missed steps at all torque settings, with one buffer i get good...

many thanks, finally i am going to use 3 buffers for the 3 step pins and the another 3 buffers for apply the same fix to dir pins (my controller only has 3 axis :)) for prevent purposes.

If i can...

at 13.8v i get some step stall, at 24v are very more step stall.

The stall are increase with:
- more steppers connected.
- with more torque settings.
- with more voltage.
- with less time...

great!. Many thanks for share. I have same issues on my 3 axis board, with 1 motor seems to work fine, but when try with 2 o 3 motors the steppers do not work fine (some step stalls on all motors). I...