Something I wanted to share and that possibly will make fdm printing compete with sls and even sla printing :)
To start of I invented a new type of cold end, it does not use a hobbed bolt but a belt. So there will never be any grinding of the filament anymore and way less jamming of the nozzle. I hope it will inspire a whole new type of extruders, called "v-struders" ;)
One of my first customers, a goldsmid, has let me know that he was able to print without any problems with a 0.1mm nozzle using moldlay wax filament. Im now searching for a place to buy a 0.1mm nozzle or even smaller so I can confirm this myself. Anyone knows a good webshop, preferably with fast shipping?
To this moment I was only able to test the v-struder with a 0.4mm E3D nozzle. In an extrusion only test, using petg 1.75mm at 235 degrees celcius I was able to extrude up to 2 meters per minute of raw filament without any slip in a bowden configuration with a bowden tube of 1 meter long. For higher speeds the filament would buckle inside the cold end in the gap between the belt and the ptfe tubing... probably because the hot end's thermic capicity to meld the filament was reached.
You can buy it here: https://reprapworld.com/?products_details&products_id/1134/cPath/1616_16...