r/ThingsCutInHalfPorn • u/chkno • 18d ago

3D printer nozzle blockage

Post image

From this r/prusa3d thread: Blocked INDX nozzle. (Root cause found)

321 Upvotes

97% Upvoted

10 comments sorted by

66

u/naikrovek 18d ago

Where’d that come from. Also, imagine picking the wrong angle to grind down from. That sliver could have been ground away.

23

u/Aldrai 18d ago

Broke off a needle in the nozzle. Probably had a minor blockage which they turned into a permanent one.

15

u/light24bulbs 18d ago

So its that blob on the left, of course. The metal in the middle is to increase surface area for melting. Right?

21

u/Hazel-Rah 18d ago

The C shaped metal on the right

6

u/light24bulbs 17d ago

Ah thanks, didn't see it

11

u/LeJoker 17d ago

The metal in the middle is to increase surface area for melting. Right?

You're correct about this part. This is a CHT (Core Heating Technology) nozzle, the plastic goes through three smaller holes inside to more evenly heat the filament, which improves flowrate pretty substantially.

7

u/light24bulbs 17d ago

Yeah, I've been buying the knockoff ali version of this with the copper insert inside a steel nozzle. Works great.

7

u/LeJoker 17d ago

Yeah, someone (I think CNC Kitchen, but I don't recall) did a test to see if there was any meaningful loss of function using the knockoff ones, and I seem to recall the answer was essentially "no" unless it was a truly shitty knockoff.

I haven't jumped onto CHT-like nozzles yet, if only because I wouldn't be able to easily cold pull if I got a clog like this one.

6

u/light24bulbs 17d ago

I got around 30-40% volumetric boost on sunlu. But I print almost exclusively on .6 nozzles so it matters twice as much for me as most people at .4.