MK4S High Flow Nozzle  

RE: MK4S High Flow Nozzle

MK4 and XL use the same nozzles and both brass HF and obx HS has been on the Prusa store for purchase since yesterday.

To get the new profiles for the HF nozzles just run your config wizard and tick the correct boxes.

RE: MK4S High Flow Nozzle

To get the new profiles for the HF nozzles just run your config wizard and tick the correct boxes.

Doesn't work for me. I checked if there is an update for Prusa Slicer or if there are configuration updates. Both are up to date but the wizzard does not show the HF nozzle configurations.  🤷‍♂️

RE: MK4S High Flow Nozzle

I just checked. There is a configuration update available, see screenshot.

RE: MK4S High Flow Nozzle

Prusa Slicer didn't show that there is a configuration update either after the application is started nor did it show the updates when checked manually (Menu => Configuration => Check for Configuration Updates). But at least I was able to import the configuration manually thanks to the update in that regard. 🙂

RE: MK4S High Flow Nozzle

65€ for the Obxidian version (times 5)? At the price points of a Mk4s or XL you could really expect a coated hardened nozzle that just prints everything. It's a typical PR move not to just make them the standard option.

RE: MK4S High Flow Nozzle

The ObXidian IS a coated and hardened nozzle. 🤷🏼‍♂️

RE:

Yes exactly. I have them, they're awesome and a 100% drop-in replacement requiring zero changes to the profiles. There is no reason to use brass except lower cost. So why don't we just get the best possible nozzle with the $$$ printer? Does Prusa really earn so much selling replacement nozzles you can get basically everywhere? Btw. e3d sell the CHT Obxidians for 50GBP (7 € less than at PR, and possibly better shipping options for some). I might get just one when the price dropped a bit.

RE: MK4S High Flow Nozzle

I expect >90% of the printed materials are PLA and PETG or other non abrasive materials. So why should there be nozzles installed, which cost 4.5 times more just for  <10% of use cases? Sure the ObXidian HF nozzles are the latest and greatest "print everything with me at high speed"-shit. But there is no need for it in >90% of the use cases.

And yes: I have five 0.4 and five 0.6mm ObXidian without HF and now ordered five 0,4mm HF ObX.
I could also whine about, because I ordered the five times the 0,4 and 0,6mm ObX which are now more or less useless with the 0,4mm HF ObX. But that's the curse of the early adopters and "I want everything and I want it now"-people. I just take it as that. 🤷‍♂️

RE: MK4S High Flow Nozzle

I'm just saying that if you buy the Mk4s kit at 800€, dropping in an Obxidian HF vs brass HF would be a whopping 5% difference, less for the assembled printer. And then every buyer would have one of the best nozzles in the market which will last most normal people forever. At double the price of the competition, why not just give the customer the best of everything if you have it. They could at least make it optional when you order, and drop the brass altogether if they find most people opt for Obxidian (which wouldn't surprise me, because "hey want this one instead for 30€ more and never again care about what material you print?"). Prusa is a premium product at this point, anyone with a tight budget probably won't consider buying them unless maybe if they're a farm.

I'm not complaining, I have my regular Obxidians, the hobby budget is well filled and speed doesn't matter much for me. I just find it a weird move. But then again I'm still sticking with them despite all the weird moves.

RE:

Hi,

@baconfase

Since the HF ObXidian are not officially supported, or at least its not stated in the Shop. Have you had a chance to the test the new nozzles yet?

I am considering swapping all 5 0.4 brass for 0.6 HF and possibly HF ObXidian nozzles since its a bit cumbersome to have 0.4 and 0.6 nozzles mixed in the printer.

What do you suggest for mostly structural parts (PC, PC-CF, PETG, ABS) ? 

Best

Fabian

RE: MK4S High Flow Nozzle

I haven't purchased any of the new nozzles. Most of the things I print wouldn't benefit much from a HF nozzle. But they seem cool and make the most sense to me with the larger sizes.

RE: MK4S High Flow Nozzle

Hi, maybe my information are outdated, but I learned that hardened steel nozzle are not designed to print unfilled materials like PLA and PETG. Does this changed? When I read this thread, it seems Obxidian nozzles are a good allrounder solution.

Personally, I am working with Mk4's and XL 5-head printers, often a mixture of TPU, PLA and PA6 etc. materials. Swapping 0.6/0.4 brass and the hardened nozzles are a pain, especially with the XL as I have to calibrate the position of all 5 heads after each swap.

So what I wanted to ask, are there any painful drawbacks when using Obxidian nozzle with TPU or PLA?

RE: MK4S High Flow Nozzle

I have been using an ObXidian nozzle on my MK4 for months now, also on the Revo Six on my MK3S+. I have printed PLA, PETG, ABS, ASA, PC-CF, PLA-CF, TPU, TPE with them and did not have to change anything in the profiles for them. Same temp settings etc. I can see no drawbacks at all, painful or otherwise 🙂
Perhaps for your wallet on an XL5T ... 😉

RE:

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  🙁

RE: MK4S High Flow Nozzle

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: MK4S High Flow Nozzle

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

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.

1. How is the overall experience with the new HF nozzles, (both brass and Obxidian)? Do you prefer the HF over the standard one?
2. 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?
3. 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.
4. What Nozzle or Nozzle combination is your overall preference? And Why?

   Beste Fabian

RE: MK4S High Flow Nozzle

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.

1. How is the overall experience with the new HF nozzles, (both brass and Obxidian)? Do you prefer the HF over the standard one?
2. 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?
3. 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.
4. What Nozzle or Nozzle combination is your overall preference? And Why?

   Beste Fabian

RE: MK4S High Flow Nozzle

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.