Hi, I wonder if E3D ever experimented with nozzle valves, and what their thoughts on it were? Just got interested in it after seeing review of the Cel Robox. Joe
The blurb on their website is at http://www.cel-robox.com/technical/#features under Nozzle Valve System. I saw a post the makers did, from when they were doing their kickstarter, where they said the needle valve took quite a few iterations to get right
The patent is quite informative. Think stratasys dimension style rocking head with needle valves inside. As the idle nozzle rocks away from the print the needle valve closes the orifice. https://www.google.com/patents/US20140242208
