Tom Brazier, a gentleman in Great Britain, has a YouTube video on his home-made version of the VDE-100 extruder. [
www.youtube.com]
Tom has been instrumental in tremendously improving Marlin, particularly as regards fixing very old issues of ADC readings, his introduction and implementation of MPC (Model Prediction Control) for much better control of hot end temperature, and his recent work on movement shaping in Marlin, which can eliminate many printing artifacts.
The take-away from his VDE video is that it is easily made DIY, and that the use of multiple screw threads is pointless, as only one knife edge can be in contact with the filament, as the latest "VDE in action" video shows. I really need to make a new video, but infinite thanks to Tom for his thoughtfullness and efforts!
