This is not better design. Better is to have 3 independent motors and to correct for bed height before each print with a probe.by ov_darkness - Mechanics
This type of design need two powered Y screws, or circles will be elliptical. Nuts with backlash correcton are good idea. Igus has sth like that.by ov_darkness - Mechanics
Dear RepRappers, I'm designing CoreXY system from scratch (lots of hurdles along the way) which will be, in my opinion, quite advanced machine. I've decided to at least partly base it on E3D motion system, but make it more sturdy and reliable, using more robust components. Also, chamber will be heated to at least 100C, so each component I choose should be also designed to be used in elevated teby ov_darkness - Mechanics