Did you use the Motion Manager Wizard to try tune?
I have not used this yet as i must wait for my CAN bus adapter first.
In the video you posted... In comparison, my X-Axis, moves much smoother, but still needs tuning.
I am running from Step/Dir mode. Pusles from Ruida controller.
How are you controlling the movement in the video?
My Y-axis does not move.
What is the "F" command you are referring to? Is it a CAN command?
If you sending a CAN command I found the Decimal to Hex value a bit confusing in the beginning.
Examples: (I think/I hope, this is correct...)
STW 0x77 Value Load Step Width 77 01 00 00 00 01 (01 = LSB)
STN 0x64 Value Load Step Number 64 50 C3 00 00 01 (50000 Decimal = C350 Hex)