With input from multiple users we have been looking into the PLA printing performance of some of our Budaschnozzle 2.0 hot ends. Some users have reported seeing PLA pooling on the top of the heater block.
PLA becomes very thin when heated to extrusion temperature and can continue to become less viscous if the hot end temperature is raised above the minimum extrusion temperature. Because of the low viscosity of PLA at extrusion temperatures it can flow through the nozzle threads and upwards out of the top of the heater block. Users printing with ABS filament will not see the same problem as found with PLA. ABS is more viscous and is not able to flow through the nozzle threading.
Thank you for your patience as we have looked into several possible solutions.
We recommend that affected users utilize one of the following quick and easy procedures.