Michael K Johnson on Nostr: npub1yrlmn…58gpm I finally soaked the old nozzle in acetone long enough to discover ...
npub1yrlmnr0y2ch5ycn38j2navyduf5q6tqyd0led3p7xhwmzwcrlsaq558gpm (npub1yrl…8gpm) I finally soaked the old nozzle in acetone long enough to discover that if feels like there's some sort of grit that was jammed in place in the nozzle, so what I had was heat creep that showed up only after the nozzle was jammed. This was old filament.
That said, having the cooling under a shroud that almost completely blocks airflow is a puzzling design decision.
I wonder whether static pressure is a more important measure than free airflow for this purpose, on the theory that there is probably so much back pressure that the airflow is substantially impeded. GDSTIME has a 24V 3010 radial fan (would take some ducting) that, while it is rated at only 1.75 CFM, is also rated at 0.42 inches of water column, or about 105 Pa.
That said, having the cooling under a shroud that almost completely blocks airflow is a puzzling design decision.
I wonder whether static pressure is a more important measure than free airflow for this purpose, on the theory that there is probably so much back pressure that the airflow is substantially impeded. GDSTIME has a 24V 3010 radial fan (would take some ducting) that, while it is rated at only 1.75 CFM, is also rated at 0.42 inches of water column, or about 105 Pa.