Dear friends,
I’ve been getting consistently good results with Creality PLA on my K1 Max, but I’m now trying to move to eSun PETG-CF because I need parts with more strength and durability. Unfortunately, I’ve been struggling to get reliable prints with this filament on anything larger than a small test piece.
For example, a 3D Benchy printed fine with PETG-CF, so I know the machine can handle it. But whenever I try to print something bigger that covers about a third of the build plate, the job eventually fails. The most frustrating case was an overnight print: the first few percent of the part must have shifted or lifted off the plate slightly, and the printer just carried on. By the morning I had a full-height print with misaligned layers and a huge amount of wasted filament. Strangely, the later layers looked fine even though they were printed on top of the shifted base.
I’ve experimented with different setups in both Creality Print and OrcaSlicer, but haven’t found a configuration that’s stable. I’ve tried:
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Temperatures: nozzle between 250–265 °C, bed 80–90 °C
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Bed adhesion: textured PEI with some glue
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First layer speeds: slowed down to 15–20 mm/s
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Durozzle 0.4 PCD diamond nozzle
Even with these adjustments, the same issue keeps happening — small prints succeed, but large structural ones fail early in the job.
If anyone here has a working K1 Max profile for PETG-CF, or tips on what’s worked best for you (e.g. flow rates, fan settings, bed prep, infill strategy), I’d be hugely grateful. This is for a functional part that needs to take a heavy load, so strength is critical, which is why I’ve been trying 70–80% infill — but maybe there’s a smarter way to get strength without stressing the print.
Any advice, shared profiles, or even lessons learned from your own experience with carbon-fibre PETG would be a massive help.
Thanks in advance for your support!
