I just returned from a short vacation and had the nozzle and PTFE -tube sunk in Acetone. This worked very well. The ABS and PLA expanded and became rubbery. It disloged from any surface and floated around. I could pull a large, expanded tube of PLA from the PTFE-tube and I can actually see light through the 0.4mm hole in the nozzle. Sadly there was not enough time to do a test-print. Hopefully I can do that on friday night. With lots of luck printing PLA will work out this time and I can get back to create all the designs that have been piling up here.
by Marcus Wolschon on Mittwoch, November 02, 2011