A bit confused about the nozzles.. CHT vs. HF
Hi there,
just finished the upgrade of my MK4 to MK4S, which obviously included the CHT 0.4 mm nozzle.
Do I have to change the printer type in Prusa Slicer accordingly from the standard "MK4 0.4 mm" nozzle to a "MK4S HF0.4 mm" nozzle?
Simply asked, is "CHT" equivalent to "HF"?
And, since I bought a ObXidian hardened nozzle a while back, would the change to that nozzle require the change in Prusa Slicer back to standard 0.4 mm again?
Or is ObXidian a "HF" nozzle type as well as "CHT", maybe?
Thanks in advance,
Thilo
Best Answer by FoxRun3D:
Yes, CHT is HF.
No, Obxidian is not HF (but you can now also set Hardened as a nozzle type on the printer, which is what Obxidian is)
I noticed they now also offer a Obxidian high flow nozzle, in addition to the regular Obxidian, to make things even more complicated.
RE: A bit confused about the nozzles.. CHT vs. HF
Yes, CHT is HF.
No, Obxidian is not HF (but you can now also set Hardened as a nozzle type on the printer, which is what Obxidian is)
I noticed they now also offer a Obxidian high flow nozzle, in addition to the regular Obxidian, to make things even more complicated.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...
RE: A bit confused about the nozzles.. CHT vs. HF
CHT is a brand name for a high-flow internal geometry that BondTech patented. AFAIK, E3D (who actually makes the Nextruder nozzles for Prusa) licensed the CHT technology from BondTech to use on both their CHT Revo nozzles as well as the CHT Nextruder nozzles that they are making for Prusa. I'm not sure what technology the E3D "highflow" nozzles (that don't mention CHT) use.
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs
RE: A bit confused about the nozzles.. CHT vs. HF
In the meantime, I read again thru tue upgrade guide from MK4 to MK4S and noticed a sentence that I didn't pay enough attention to forehand:
(What's in the kit)
"New high-flow Prusa Nozzle CHT."
Shame on me, the information I was searching was already there.. CHT is High-Flow.
So I changed the printer profile in Prusa Slicer to the MK4S 0,4mm HF-nozzle.
The speed of the MK4S ist truly amazing, although I didn't measure the difference between standard and HF nozzle.
The upgrade to MK4S is worth the money.
BTW: I'm pretty sure I can use the ObXidian nozzle that I bought a while ago, although that's not the HF type, which I now recognized. A HF version is available as well. I'll just change to ObXidian when I print some filament with carbon or glass fibre in it. Doesn't happen too often though.
Thanks to all who read and or answered my post.
Cheers!
Thilo
RE: A bit confused about the nozzles.. CHT vs. HF
After reading this, I wanted to learn more about the CHT (Core Heating Technology) nozzles. In case anyone is interested, here is a blog post about it from Bondtech.
RE: A bit confused about the nozzles.. CHT vs. HF
CHT is a brand name for a high-flow internal geometry that BondTech patented. AFAIK, E3D (who actually makes the Nextruder nozzles for Prusa) licensed the CHT technology from BondTech to use on both their CHT Revo nozzles as well as the CHT Nextruder nozzles that they are making for Prusa. I'm not sure what technology the E3D "highflow" nozzles (that don't mention CHT) use.
The prusa "HF" nozzles, brass and obXidian, are the same profile as the Revo HF's. Also, If you have (a clean one) in hand, the two-piece machined section is obvious around the tip.
RE: A bit confused about the nozzles.. CHT vs. HF
If CHT is HF then why do they have both in stock? What is the difference between then except the price?
E3D Prusa Nozzle: High Flow Brass - 0.4 mm | Original Prusa 3D printers directly from Josef Prusa
Prusa Nozzle brass CHT - 0.4 mm | Original Prusa 3D printers directly from Josef Prusa
RE: A bit confused about the nozzles.. CHT vs. HF
Internal Geometry. The CHT nozzle was added first, likely based off of BondTech's CHT design. The HF nozzles are specifically E3D design, and came with the introduction of the MK4S.
If CHT is HF then why do they have both in stock? What is the difference between then except the price?
E3D Prusa Nozzle: High Flow Brass - 0.4 mm | Original Prusa 3D printers directly from Josef Prusa
Prusa Nozzle brass CHT - 0.4 mm | Original Prusa 3D printers directly from Josef Prusa
RE: A bit confused about the nozzles.. CHT vs. HF
Curious why the prusa slicer has the same settings profile for speed regardless of CHT or HF nozzle used... I thought the whole point for HF nozzle was to print faster. Maybe, they didn't update the profiles yet...
RE: A bit confused about the nozzles.. CHT vs. HF
Curious why the prusa slicer has the same settings profile for speed regardless of CHT or HF nozzle used... I thought the whole point for HF nozzle was to print faster. Maybe, they didn't update the profiles yet...
CHT is a type of HF. (Read the above thread.)
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs
RE: A bit confused about the nozzles.. CHT vs. HF
My point is the prusa profiles don't take advantage of the HF/CHT nozzle by using the same volumetric output in standard or HF nozzle settings.
RE: A bit confused about the nozzles.. CHT vs. HF
Right! I had the same question. What is the point of buying two nozzles if they are both HF?
I understand they have different internal geometry. Does it mean they have equal performance or different?
So far we have different prices and geometry, but we have no clue how to take advantage of it or decide which one to buy.
RE:
My point is the prusa profiles don't take advantage of the HF/CHT nozzle by using the same volumetric output in standard or HF nozzle settings.
Are you sure about that? The last time I checked (a week or two ago) there was a volumetric flow difference between the Prusament PLA loaded with a MK4S printer profile active vs the Prusament PLA loaded with a MK4S HF printer profile active. I didn't check other filaments.
Found it, check my message here: https://forum.prusa3d.com/forum/prusaslicer/high-flow-nozzle-setting-does-it-do-anything/#post-731205
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs