Comment on what causes this?
ExcessShiv@lemmy.dbzer0.com 1 week agoBed is within 0.18mm from lowest to highest point (according to the bed mesh), with all four corners within 0.07mm. It’s the best I could achieve. But again, this is only happening on layer 2 and 3, the bottom solid infill layers. If it was a general structural issue it should be prevalent throughout the model? but it isn’t.
If the layers aren’t being properly squished down by the nozzle at the base sometimes the height will “catch up” and fix itself later. Is the left side of the image the first layer? I’m making that assumption.
The picture you posted just looks an awful lot like the offset is too high at the center of the bed; the gaps between the infill and the walls is a classic symptom of that. Having the other side of the model (the back of the picture) appear to be properly squished down is what makes me think that the bed or the gantry is the culprit, but that’s obviously just a guess from limited info.
ExcessShiv@lemmy.dbzer0.com 1 week ago
Its not, that’s my shaky-cam photo skills and the angle
Crozekiel@lemmy.zip 1 week ago
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?
ExcessShiv@lemmy.dbzer0.com 1 week ago
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.
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.