Chamber temperature
Hi, I’m new to 3D printing and I have a question.
I recently got a Prusa Core One, and if I want to print more demanding materials, Prusa offers the HT Hotend upgrade (+ nozzle), which allows higher printing temperatures. I’m wondering, though, how the chamber temperature is handled, since it is limited to around 55 °C.
For example, materials like PPS-CF reportedly require a chamber temperature of approximately 60–90 °C, and PPA-CF 50–80 °C. Has anyone had experience with this? Is it realistically possible to print these materials on the Core One with this limitation, or does it cause problems (bad adhesion)?
Thanks a lot for any advice.
RE: Chamber temperature
Hello.
I'm currently modifying my Core One for this purpose so I can get the chamber temperature above 50 degrees.
https://www.printables.com/model/1638476-prusa-core-one-hightemp-450-modification-for-britt
Right now, I’m trying to move the Loveboard to the outside, cool/protect the NEMAs, and add some kind of insulation so the heat stays inside better.
I think you’d need to insulate and/or heat the chamber to get a higher temperature. Which, of course, causes the side effects mentioned above.
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: Chamber temperature
There will also be a change in belt tension -- the belts actually contract at higher temperatures. Not sure how significant that is for print quality or lifetime of the various bearings; but for ideal settings one would have to readjust (relax) the belt tension somewhat when running high chamber temperatures.
RE: Chamber temperature
There will also be a change in belt tension -- the belts actually contract at higher temperatures. Not sure how significant that is for print quality or lifetime of the various bearings; but for ideal settings one would have to readjust (relax) the belt tension somewhat when running high chamber temperatures.
That's exactly what I want to find out: what happens to the printed object when the chamber prints at temperature “xy” for a while. So not 40 or 50 degrees—no, 60 degrees and up.
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:
That's exactly what I want to find out: what happens to the printed object when the chamber prints at temperature “xy” for a while. So not 40 or 50 degrees—no, 60 degrees and up.
The new firmware 6.5.3 has made changes to chamber temperature management. The max has been lowered from 70° to 60°. When you hit 60° a warning dialog will appear and when you hit 65° (used to be 75°) the printer will purposely crash out with an over-temp alarm. Also, once the chamber goes over 55° the fans will cut on in an attempt to lower it.
Seems Prusa is getting stricter about running a hot chamber on the Core One.
What's even more interesting is why this isn't in the release notes...
RE: Chamber temperature
A temporary solution would be to move the temperature sensor for the chamber further down. That worked for my Core One as well. A difference of 10 to 15 degrees is achievable.
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:
A temporary solution would be to move the temperature sensor for the chamber further down. That worked for my Core One as well. A difference of 10 to 15 degrees is achievable.
I guess the real question though is how long can the love board electronics, motors and lubricant handle being above 60°.
Also, and I'm wildly speculating, but maybe Prusa lowered it but didn't document it in the release notes because they are preparing to release an actively heated chamber kit for the Core One. Otherwise, why wouldn't they mention a significant change like this unless maybe they thought most people wouldn't notice anyway?