I have been working min this issue for many hours, and can't find the right answer. I do understand that my problem probably is under extrusion - but why?
When I print with the automatic medium setting, all is ok. The print is perfect. The lines are correct thickness and the bed height looks to be perfect Prints are great!
When I advance it to high - no other settings changed; the lines are very thin causing a significant gap between them and no go print. But the ONLY thing I can see change from medium to high setting is tok and and bottom solid layers (from 3 to 4 on both) and infill from 20% to 30%. Nothing else seems to be changing.
So why does it then all of a sudden start to extrude less? I realise I can adjust it, but since no extruder settings are changed I feel it would be wrong to compensate.
The darker print is ion medium setting, the lighter on high setting. No other changes. I went back and forth a few times to make sure it wasn't a coincidence. I'm using the same filament.