Weird First Layer Anomaly
I've been having this issue for a while and cant put my finger on it. uses adaptive bed mesh and prints brim and boundaries fine but as it does the infill it slowly get closer to the bed to the point of not extruding anything?
Any help would be much appreciated, Caleb
10 Replies
That does look weird. But It looks like it is not extruding enough anymore and not your nozzle going closer to the bed.
Maybe you have a partial clog?
I guess you stopped the print where the infill stops alltogether?
has it happened before in a similar way?
Filament path fully fluid from spool to extruder ?
I've checked with callipers and it definitely gets thinner
When the z-gap is to small, the nozzle pushes the filament out of the sides and you get ridges in the first layer, not holes.
This is a flow issue, which could also cause it to get thinner
If I baby step the z up it continues noworries so it'd definitely not clogged
that is super weird. I've never seen underextrusion due to the nozzle being to close to the bed. Usually your extruder can easily push the filament out the sides when the nozzle is too close.
Not sure what the issue here is then.
Can you share your extruder/bed temps, mesh and possibly printer.cfg? Maybe that'll clear something up or someone else has an idea
Yeah I can put them up. Temps are PETG 250°/80°
In mainsail, the interface should show you the planned and actual position of the nozzle (after calculating the z-offset with the mesh).
Do you see that number going down during the print? For the Z position, one should stay at 0.2 / 0.25 and the other is above in brackets and changing depended on the mesh
I encountered the same situation and the solution was to correct the extrusion, hope this will help you
how did you go about fixing your extrusion. I've done all the tests and calibrations for extrusion but still have the same weird issue.