RE: ObXidian nozzles - how good are its non-stick properties?
My experience is completely different. I have an Obxidian nozzle that I only clean infrequently. I print PLA, PETG, and PC+CF, and the nozzle is as good as new. I have printed LOTS of things with this nozzle so it is well-used. I don't pay much attention to the outside coating, but to the quality of the prints, which is excellent. I got the nozzle so I wouldn't have to change nozzles when I printed the CF filament. I used the Obxidian nozzle on my MK3/S with the same results.
Senior Life member of IEEE.
RE: ObXidian nozzles - how good are its non-stick properties?
Anyone tried the ObXidian with the MMU3?
Interested to hear whether it does anything different with the filament tips upon retraction by the MMU3?
--> MK4 - MK4S - MINI+ - MMU3 - Accelerometer Guide - BambuLab A1 Combo <--
RE: ObXidian nozzles - how good are its non-stick properties?
I will update my post. I use the ObXidian .4mm nozzle on my MK4 (soon to be an MK4/S) and it works great. I don't have to change nozzles when I print CF material.
Senior Life member of IEEE.
RE: ObXidian nozzles - how good are its non-stick properties?
Anyone have recommended settings for PCCF with a .4 nozzle? I'll be using my ML4S to do the printing.
I ordered a roll of Prusament and a .4mm obxidian nozzle to print PCCF parts for my printers. I don't want to end up with a clog.
RE: ObXidian nozzles - how good are its non-stick properties?
Just use the standard profile for it in PrusaSlicer. Printed with it a few times on my MK4 with a 0.4 mm ObXidian nozzle, inside the Prusa Enclosure. I just waited about 15-20 minutes with the heated bed at temp before starting the print to let the enclosure heat up. Beautiful stuff.
RE: ObXidian nozzles - how good are its non-stick properties?
And I forgot to mention that it is very important to dry it before printing!!! 🙂
RE: ObXidian nozzles - how good are its non-stick properties?
How do you dry a nozzle? When it heats up, it will dry out (assuming it's wet)
Senior Life member of IEEE.
RE: ObXidian nozzles - how good are its non-stick properties?
What does the paint do? I just use the nozzle on my MK4 and the standard Prusaslicer profiles. Works great.
Senior Life member of IEEE.
RE: ObXidian nozzles - how good are its non-stick properties?
I meant dry the filament, of course. 🙂 There was a post a few days ago where another user printed PC-CF without drying it first and the results were not exactly optimal.
And I can recommend using a satin powder-coated steel sheet with Prusament PC-CF, if you have one. I did not use glue stick on it and the prints came off by themselves after cooling.
RE: ObXidian nozzles - how good are its non-stick properties?
The paint acts like the teflon coating in a frying pan to some extent. I do recoat the nozzle from time to time. Especially after running the nozzle temperature too low for PTEG and a subsequent blob formation. The paint isn't fool proof enough to keep my actions out of trouble but I think it helps.
RE: ObXidian nozzles - how good are its non-stick properties?
Depends what material you are printing. PLA and PETG don't like a heated chamber. Dunno about ASA. Never printed that stuff. PC does, just to keep drafts away from the print.
I use a satin sheet for printing nearly everything. PC is not really hydroscopic. PA is, however, which is why I don't print it.
Senior Life member of IEEE.
RE: ObXidian nozzles - how good are its non-stick properties?
All types of filament are hygroscopic to some extent. PLA is the less sensitive of all, but if you let a spool hanging around in the open for months, it sure will become brittle and troublesome to print. PC is very hygroscopic and prone to get moisture, not so much as some types of PA but more than PETG or ASA.
Best practice: if your unsure about the condition of some filament, dry it, even if it's a new sealed spool, Another option is to print first a small part and see how it comes out (stringing, oozing, bed adhesion, blobs, etc..).
Folks, if somebody here hasn't read yet the pages about materials on Prusa's site, please do it. Lots of useful info there and you can spare yourself some annoying mistakes when trying a filament for the first time.
https://help.prusa3d.com/materials