Some users have encountered flaking or delamination when removing parts when printing on bare glass. We recommend printing with either the stock PET surface, or with the new PEI print surface that some of our more advanced users are using with great success.
Thanks!
I’ve been having a similar issue with ABS. After about 2 hours into a print the extruder jams. I’ve been reading a lot regarding ideas to correct. My dabbling with this problem seems to support the “heat creep” idea of the material getting exposed to heat prior to entering the heat chamber. As the knurled bolt pushes more material it bunches up the soft plastic and eventually causes a block. As others, I’ve experimented with providing extra cooling to the heatsink on my extruder. My issue has been how to push ventilation air through the heatsink. I’ve looked at the ideas of placing fans and directing the flow of air through the fins. This I find is too much work (havimg to design a holder for the fan) - not to mention the extra weight on the hot end assembly.
Here’s my last try. Instead of the complication of hanging a fan near the heatsinks, I’ve chosen to direct air through a silicone hose (about 5mm ID). This hose is nothing more than silicone aquarium air hose. I drive air through a cheap aquarium pump. See attached pics on how the hose attaches to the hot end. The air pump is rated at about 5L of air per minute. Seems to be enough to cool heatsink without affrecting the actual print. I’ve chosen to direct the air to the lower part of the heatsink. Total cost less than $20. Total install time -less than 10 minutes…
So far, results have been promising… no jams… I’ll keep my fingers crossed.
I’ve been using this cooling approach since last October. I can report ZERO issues with clogs since then. TAZ is at point of high reliability. I just set up and go. Good luck with yours!
im having same problem tonight for the first time after using large quantities of acetone in the room. my method for using acetone is evaporating it on abs so i tought it might ve effected unprotected abs spools (i do my process in closed glass bowl but not entirely airtight) i can easily hold heatsink barehanded while printer is on but ill also try tunneling more airflow to heatsink.