Here is my new mechanical setup. Consider that the height of the frame was the original height of the assembly with the brushless motor… quite a reduction!
It’s all very smooth, except for the bearing of the yoke axis. I think it’s a mix of cheap chinese bearing coupled to a cheap chinese steel rod, which is far from flat and regular. I’m trying to improve it a bit with some sanding but well, sanding steel is a rather boring job.
Without the front bearings, anyway, it’s really smooth. I need to make a support for the second driver board and I’m ready to test the two axes. Next week I should get the PCB for the USB board.