I just built my Egg-bot. Everything went well, but when I print an egg, the egg rotation stays within a 2mm area, moving back and forth rather than around. The pen arm works fine.
I have tried adjusting the CUR ADJ. It apears to spin freely in both directions, so I cannot turn it "all the way" in either direction. I tried adjusting it while use the Walk Motor 2 (egg) command in Inkscape. I can't get the rotation to work. Oddly, in some positions of CUR ADJ, the pen arm starts to move when I send a Walk Motor 2 command.