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New VC4 prints awful

So, I just finished building VC4 (CoreXY) with standard extrusion setup (Oriter 2 + Rapido Plus 2) and I can't figure out what's the problem with extrusion. In general it prints but there are quite a lot of weird things going on. First layer sometimes looks like is underextruding (picture with yellow filament), or it could be the z-offset to high, but I followed beacon inital configuration and z-offset conifguration. I also did Orca flow test and they look quite alright to me. The printer test print however looks awful. The top layer are quite bad, the bridging failed for small bridges and you can also see one of the round bits is not "complete".

Solution

Ok. I've been working on the machine again today still trying to fix the belt tention, I also swapped to yet another fresh filament roll and now it prints perfectly. So not really sure what was the problem but it's magically solved.

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