HT Hotend Upgrade
Hi,
i have bougt a Prusa Core One L in january for printing PEEK for business cases. The thing is, that the HT Hotend Update should be released in February (confirmed by mail) but now in the middle of April the Hotend still not released.
Can anyone please tell me when this product will released? Thx forward
RE: HT Hotend Upgrade
Short answer: Pure PEEK is not printable on the Core One L – not even with the HT Hotend Upgrade.
PEEK requires a complete package that the Core One L simply can’t deliver:
Nozzle: 360–440 °C → The HT Hotend does reach 400 °C, but that alone isn’t enough.Bed: 120–160 °C → The Core One L isn’t designed for that range.Chamber: At least 120–133 °C for proper in-situ crystallization. The Core One L passively reaches ~55 °C max, and the firmware aborts at 65 °C. Bridging the gap from 55 °C to 133 °C with mods isn’t realistic – the Loveboard, steppers, belts, lubricants, and the Nextruder’s loadcell aren’t rated for those temperatures.
Without sufficient chamber temperature, you’ll only get amorphous PEEK, which takes a massive hit on nearly every relevant property (strength, chemical resistance, thermal resistance). Post-processing annealing can partially compensate, but it introduces significant warping.
What the Core One L with the HT Hotend can do: PEKK-CF, PPSU, PPA-CF, PPS-CF – all high-performance polymers that tolerate much lower chamber temperatures (~60–90 °C). Depending on your application, PEKK-CF could be a viable alternative.For actual PEEK, you’ll need a dedicated high-temperature machine (Intamsys, Apium, CreatBot PEEK-250, or the Prusa Pro HT90).
PS: There are already several threads in the forum covering this topic – e.g. “Chamber temperature”, “Maximum Nozzle Temperatures for XL, Core One, MK4/S”, and “Core One / Print Temperatures”. You’ll find more details and real-world experience with chamber mods and their limits there
PPS: This text was generated by AI. I asked a question and received an answer.
Mods for Core One: Core One HT 450 degrees, Comfortable display , Very fast print start and Reducing noises
Mods for Prusa XL: Very fast print start
RE: HT Hotend Upgrade
Hi, thx for reply but that was not the question 🙂
RE: HT Hotend Upgrade
Hi, thx for reply but that was not the question
I know 😉 .... I just wanted to give you a heads-up.
The nozzle won't be released until the firmware for it is available.
Mods for Core One: Core One HT 450 degrees, Comfortable display , Very fast print start and Reducing noises
Mods for Prusa XL: Very fast print start
RE:
Presumably you read the reply though, which stated that it can't print PEEK? Since you claim you bought it for PEEK, you will have to get a different machine and then you no longer require the HT nozzle.
Hi, thx for reply but that was not the question 🙂