Prints keep failing after some time
hi all
I recently assembled my core one and have printed successfully some smaller things in PLA and PETG.
However, each time I'm starting to look at larger objects and longer prints, things keep failing on me.
I'm using Prusament which is dried.
An example is attached (nozzle change tool) where you can see that after about 50-60% in the print, I'm
starting to get bad layer adhesion and brittle prints.
Any idea why this is happening? Generally I'm using the preset settings in slicer for Prusament.
have printed successfully some smaller things in PLA and PETG
You *might* have a partial clog.
When switching from PETG to PLA - even if the printer was unused overnight - load and purge the PLA at PETG temperatures so that any residue is melted and pushed out.
If it has been there a while it may bake-in and become hard to shift; look up how to cold-pull, you will have to use the manual method as apparently the Core One doesn't have an automatic option.
Cheerio,
RE: Prints keep failing after some time
Additionally: with enclosed printers, it's very important to always tell your ambient temperature, since it's a fine balance between very low warping due to a warm chamber with barely any airflow around the first layer and on the other hand, the heatbreak and filament getting too hot after some time into a print. (and getting bad overhangs).
Please tell us your room temperature and also enable the heatbreak temperature reading:
Menu - User Interface - Footer - empty slot - > heatbreak.
For PLA, the extruder will struggle from about 40°C upwards and for PETG from about 50°C.
Opening the door helps instantly and a lot, but can cause warping.
You can also go into the Slicer settings - > Filament - > Custom G-Code. Scroll down in the upper code field and adjust the heatbreak temperature aim from 36°C to 32°C (PLA).
This will ramp up the heatbreak fan a bit earlier. My heatbreak climbed to 40°C and the heatbreak fan was only running at about 80%...
Raising the chamber fan limit helps too, but the printer will sound like a jet.. (I hope you don't have one of these DIY filter boxes attached to the rear - without an extra radial fan?).
RE: Prints keep failing after some time
thanks all for the suggestions - after spending almost a full day with several support agents, I decided to ship the core one back, and go for a refund.
This is not the 'hassle free' machine I had in mind (and as advertized) unfortunately, but maybe that is bad luck.