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what causes this?
(lemmy.nz)
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
Its not, that's my shaky-cam photo skills and the angle. And it's not like it "catches up" as the print continues, smoothing it out. It's consistent all through entire layer 2 and 3, and as soon as layer 4 starts, it's completely gone on layer 4 and onwards.
I think what they meant by "catching up" would happen at later layers, not later in the same layer. Basically, those layers are bad themselves but putting down enough material in the right places that a future layer will go down correct and smooth. So layer 4 being fine basically agrees with above commenter.
Are we looking at layer 2 partially complete or layer 3 partially complete? Because while I see the obvious problem on the partially complete layer, I also see problems on the layer that is complete. The back right area has tell-tell signs of too low z-offset (the very thin pinch lines coming up) but as it moves to the front of the image it looks like the z-offset is too high (not closing the gaps at the ends of lines and defined gaps between lines). Even the layer that is in progress looks like the lines are coming apart as the print head moves from back to front, like the gap is bigger in the front than back.
This all shouts levelling problem or motion system problem.
Has it always done this?
Did you get the printer new?
How long have you had it?
Can you post a picture of the bed mesh?
What temperature was the bed when you took the bed mesh?
No I'm saying the gap between lines on layer 2 and 3 is the same throughout the entirety of both layers without change (also on walls), but not present at all on layer 4 and onwards.
Partially complete layer 2
This seems to be unrelated to Z-offset, as it's happens regardless of print placement and orientation but follows infill direction with the more squished part being towards the end of the layer and the slightly less squished part being the beginning.
The entire bed is within 0.18mm from lowest to highest point, with 0.07mm between highest and lowest corners. According to the probed mesh at least when I probe the entire bed.
This is also following infill direction actually, now that I think of it. It starts out almost ok, but gaps occur to a greater extent as solid infill progresses (regardless of print orientation and infill direction)
I honestly can't remember...maybe?
Yes
8 months or so
55°C, heat soaked. It uses KAMP so it's a new mesh every print.