Been looking at printer designs for a while now. I keep noticing many seem to leave the lead screws unsupported at the opposite end to the motor. What is the reasoning behind this? I've read this is because many arent straight, but would it not be better to have a small machined end sat in a bearing? Like a ball screw. Which leads me to ask, is cost the only reason we don't see ball screws useby mission - Mechanics