MK4S High Flow Nozzle - General discussion, announcements and releases

RE: MK4S High Flow Nozzle

beegmouse — Sun, 19 Jan 2025 14:13:01 +0000

I think you are having a different issue, or a blockage. Are you using generic filaments? Or one which has been tuned already?

I bought 1 Obxidian and 1 Brass for a Prusa XL (I'll only be doing abrasives through one nozzle.)

It prints really well, PETG in particular is much more glossy implying a more thorough heating.

My main issue with it is that the printer/slicer seems bottlenecked somewhere else.

I'm running a large print for production which is nearly all perimeters.

0.4mm Stock Nozzle gives 1 day 6 hours with a max volumetric flow of 12mm/s

0.4mm HF Preset fives me 1day 6 hours with a max volumetric flow of 24mm/s

Any ideas anyone?

RE: MK4S High Flow Nozzle

str0gg — Thu, 17 Oct 2024 21:20:39 +0000

It should’t be. I also have voron 0 with hf nozzles and its beats mk4 with precision, speed and it can truly print abs/asa/pc/pa with out any problem… So I would expect that if print petg calibration cube which does not cut time with hf, print should be identical in quality.

RE: MK4S High Flow Nozzle

Phantastic Plastic — Thu, 17 Oct 2024 21:14:59 +0000

Oh that's interesting. Is it just the HF nozzles in general sacrifice quality for speed?

RE: MK4S High Flow Nozzle

str0gg — Thu, 17 Oct 2024 21:03:37 +0000

I’ve bought e3d ObXidian HF for mk4 and it’s waste of money. Prints look like under extruded garbage and I had to go back to v6 ObXidian with adapter :(

RE: MK4S High Flow Nozzle

missingsnowman — Mon, 07 Oct 2024 18:33:36 +0000

FWIW The ordinary Prusa Nozzle brass 0.4mm is included with the MMU3 kit as it wastes filament when swapping/purging filament with the CHT/ObXidian high-flow nozzles.

Also, I am attempting to print the MK4 GCode from https://www.printables.com/model/46639-tension-meter-for-the-gt2-belts-of-i3-mk3s-or-prus/ and PrusaConnect warns the GCode is incompatible with my MK4S. Hoping a swap to the ordinary nozzle will resolve.

RE: MK4S High Flow Nozzle

ov_darkness — Tue, 24 Sep 2024 21:33:20 +0000

I'm not so sure about buying HF nozzles anymore. For it to make sense I'd need to buy 14 of them (5 for my XL, 1 for Mk4 and 1 spare, in 0.4 and 0.6mm).

I put Bondtech CHT 0,6mm on my Mk4. I'm comfortably reaching 30mm³/s with PLA. My next step is to do the same with Volcano CHT I have lying around somewhere. This should give me 45mm³/s.

There is a Volcano mod for the XL.

The only question is: will the 40W heater and tiny part cooler be enough?

45mm³/s and 65C enclosure is all I want for my XL.

Posted by: @fabianm-3
Hey,
Since the brass and Obxidian HF nozzles are now officialls supported in the Store and the slicer. Currently I have one Obxidian 0.6 HF installed (the other 4 are stock 0.4) I am still considering swapping all of them. But I would like to hear what you guys think.
How is the overall experience with the new HF nozzles, (both brass and Obxidian)? Do you prefer the HF over the standard one?
Do you prefer 0.4 or 0.6 nozzles for composit materials ( PETG-CF, PC-CF)? It is often recommended to use bigger nozzles for composits to reduce clogging, how is it for you?
Having different nozzle sizes on the print heads. What presets (setup wizard) do you use? To me this is a bit cumbersome but doable with custom filament profiles.
What Nozzle or Nozzle combination is your overall preference? And Why?
Beste Fabian

RE: MK4S High Flow Nozzle

FabianM — Wed, 04 Sep 2024 06:26:14 +0000

Hey,

Since the brass and Obxidian HF nozzles are now officialls supported in the Store and the slicer. Currently I have one Obxidian 0.6 HF installed (the other 4 are stock 0.4) I am still considering swapping all of them. But I would like to hear what you guys think.

How is the overall experience with the new HF nozzles, (both brass and Obxidian)? Do you prefer the HF over the standard one?
Do you prefer 0.4 or 0.6 nozzles for composit materials ( PETG-CF, PC-CF)? It is often recommended to use bigger nozzles for composits to reduce clogging, how is it for you?
Having different nozzle sizes on the print heads. What presets (setup wizard) do you use? To me this is a bit cumbersome but doable with custom filament profiles.
What Nozzle or Nozzle combination is your overall preference? And Why?

Beste Fabian

RE: MK4S High Flow Nozzle

Phantastic Plastic — Sun, 01 Sep 2024 15:10:16 +0000

I am very frustrated by this right now. I just bought an oxbidian nozzle for my Mk4. Partially because I want the option to print GID PETG but mainly for longevity since brass takes a beating and print quality declines as the brass nozzle ages.

Right after I bought the thing mk4s upgrade announced and there's not even an option to buy the upgrade with oxbidian. I have to buy it with a brass nozzle I don't even want, then toss that aside with my standard oxbidian nozzle I just bought if I want the hi flow oxbidian (which I admittedly kind of do). It's wasteful and expensive and just silly. Just ditch the brass as default nozzle already prusa.

RE: MK4S High Flow Nozzle

NoeG — Sat, 24 Aug 2024 07:58:50 +0000

Prusaslicer shows very little gains (low single digit percent) using the HF nozzles on the XL, at least on a few prints I looked at, before clicking order. I ended up emptying the basket.

RE:

Smutje — Sat, 24 Aug 2024 07:24:08 +0000

Awesome to hear! A painful investment at first, but otherwise no need to swap nozzles again. It happened again, that I printed PA6 accidentally with a brass nozzle - it is hard to distinguish the nozzle when they are covered with plastic. I have to mention that I use V6 adapters and therefore I have to relay on the markings on the nozzle itself :(