Spent all weekend assembling this Core One. It probably took 14 hours in total. 12 hours to build and 2 hours to troubleshoot issues. Broke some parts made some mistakes but I finished the build.
this post was submitted on 11 Nov 2025
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Obviously, your next print is a replacement tension adjustment pulley thing, as is tradition.
I have some PETG filament on the way which is another reason why I haven't looked at the issue yet. All I have is PLA at the moment.
I don't know how critical this part is but if it sees any kind of load, re-pint in abs/ASA or better. Petg and PLA creep under consent load.
And look into brick layers for extra durability.
It's pretty critical. It holds one of the pulleys that the belt is attached to. The belt moves the print head in the x/y axis. I actually did print the part in PETG. Hopefully it just works and I won't have to touch it for a year :D
You will definitely want to reprint it in something else while the printer is working. Otherwise you're going to see dimensional accuracy issues crop up over time that require you to keep adjusting the belts.
I can't really print it in a better material until I get ventilation figured out which might not be until spring of next year. I did order some parts from Prusa in case the part I printed fails so worst case I have to swap it out but so far it works very well :D
Gotta give it to them for making the machine so repairable. Even if the design here is a bit questionable.