Prusa mendal I2 Pronteer face Marlin error

[printbus]

Once we know the driver boards are adjusted, my plan forward is to next test the endstop switches so we know they are wired and configured in Marlin in a compatible way. One step at a time...

FWIW, I totally agree with Mjolinor on his assessment of the video. I thought the same thing (some acceleration followed by an attempt to rotate too fast) when I saw it. Once the endstop switches are tested, I'd then suggest testing motors with just the X, Y and Z home buttons in pronterface since homing speeds are totally left to Marlin. After we see motors working fine there, you'd then test with the 1, 10, and 100mm movements on Pronterface. This last testing could involve reducing manual feed rate settings in Pronterface, not Marlin.