I would also like to add that our robotic arm was completely printed using resin. We still have problems using articulation 2-3. We found out that the bottom section of this articulation is not aligning properly with the motor gears, so we lifted a bit the gears that go on top of motors of articulation 2 making a better fit with the internal indentations of the 3d printed piece.
I’m just wondering if the use of resin might have been an error as the robotic arm feels heavy. With help (using both my hands to grab art56 and 4) the motors can do the work but as soon as I leave it on its own, the whole ‘head’ falls. I’m 3d printing the head of the robotic arm with PLA to see if that makes a difference.