In theory retracting hot end should allow for higher quality prints and faster printing. This type of retractable hot end would allow that the printbed remains fixed and further increase precision and speed. Nozzle "dragging" should be eliminated in both printing and inactive extruder nozzle in dual hot end setups.
D3D is developing this technology and it could get on your printer soon ...
Many shoulds and woulds, but the video looks promising ... as always, future will show if this product will make satisfied buyers ...
http://www.dglass3d.com/
