I have this annoying issue where solid infill on the bottom layers doesn’t print properly. It also affects walls on those layers. It looks like under extrusion to me, but it doesn’t make sense.
- It only affects solid infill bottom layers (I.e. layer 2 and 3 for my regular slicer settings)
- it does not happen on first layer.
- it’s not a clog issue, rinsing and cold-pulling doesn’t fix it. Brand new nozzle + hotend didn’t fix it either
- it’s not a flow capacity issue, it happens even with flow as low as 2mm3/s. I’ve used both Stefan’s weighing method and orcaslicers built-in flow calibration and they agree it tops out around 25mm3/s and slicer is conservatively set to 20mm3/max
- it’s not speed related, it happens regardless of speed, from 10mm/s to the regular 200mm/s
- internal solid infill line width is set to 105%, same as top layer.
Is there a slicer setting I messed up? Prints turn out ok, slight indent only on layer 2 and 3 because of this. But this just bugs the hell out of me because it shouldn’t be happening.
Edit: it’s a Qidi xmax-3 printer
I’d say that first layer is being sliced for an overextrusion and is accounting for the wider line it makes. It doesn’t want to run over the outside wall, so it stops short and because it’s less lines per mm, you end up with those gaps. Note how many more lines per mm you’re getting on the second layer, though to me those lines are more of a problem than the bottom layer since they barely seem to be touching each other, reducing strength a lot. They started out on the right side better pressed, and that might be a bed leveling issue.
Yes those lines are exactly the issue for me, that’s the solid infill happening on layer 2 and 3. It’s only those two layers that have this behavior. The first layer is fine (not perfect, but not an issue).