The current wall setting process seems to be stopping when a full-width wall no longer fits then relying on "fill gaps between walls" to patch it up, then relying on this merge process to convert back into thin walls. In this case, my nozzle dimeter is 0.4 and the wall is 1mm thick, so even though my wall thickness is set to 1.6mm, Cura would only produce two walls (one on each side) and would have to fill the gap in the middle using "Fill Gaps." Between these walls there is now a 0.2mm gap. Cool, as long as they’re working on it I’m happy. Tuning skin_overlap_mm alters the behavior but doesn't seem to be able to make the problem go away. The algorithm I have in mind is something like this: This will produce wall line overlaps - any solution inherently does - so it doesn't work without compensation. But it throws errors during the make. It's happening in the regions where long line segments of the skin fill fit; the regions where it's a rapid zigzag are getting replaced. But, atleast in older versions of Cura, if you go to the layer-view you can kind of preview/see the problem. if using cura, just remember to turn off "combing mode" and "fill gaps between walls" . I am printing with 6 walls and 95 percent infill (grid) if you look at the travel moves, the travel moves between the filled gaps in the walls are NOT using retraction. Found where this was changed, it was Ultimaker/CuraEngine@9b999e7. This particular issue (and nothing else) is really preventing me from using the 3.0 version, so I hope it will get fixed. this causes a LOT of blobbing OUTSIDE the walls thanks to oozing. I think the same (or ideally a better) version of it could be implemented on the polygon object in a much less expensive manner, though I didn't go into working out the details. Sign in Too thin extrusion width, Weird infill on walls using exact uneven multiples of Line Width, Feature request: fill_perimeter_gaps with thin lines, [4.4.1] Strange pathways in the middle of wall of hollow cylinder on some layers, [BUG] JUNCTION_DEVIATION creates unexpected decelerations/accelerations on smooth curves, Print time bug 0.2 and 0.28 CURA 4.6.1 CR10S pro, Processing circles is done using many breaks and "sticky work", getting tiny infill lines instead of circles. As a really stupid hack, I think it would work to double the number of wall insets generated here, spacing them by half the line distance instead of the whole line distance, and relying on overlap compensation to fix them. I have a stucco-sided house that I am repairing/repainting. G1 F2400 X-53.922 Y16.99 E0.00061 210 96 40 000 × Menu. Perfect! It's a bit of an iterative improvement case. Whether it will ever be any good, I cannot say. Fill gaps between 1/4 and 1/2 inch in width with two beads of caulk set side by side. I've just tried with this model using a Custom FDM Printer: Someone else is probably very happy that Cura 3 no longer fills the tiny gaps because those movements created extra lines across the top of their part so the nozzle could go back and fill those tiny holes. Ultimaker Cura is free, easy-to-use 3D printing software trusted by millions of users. By clicking “Sign up for GitHub”, you agree to our terms of service and Censorship? With 0.4 nozzle/line width, the concentric rings should print as three lines, but instead they're printing very slowly as zigzag fill between the two outer wall lines. Indeed, the fundamental problem seems to be that WallsComputation::generateInsets simply successively offsets the outline polygon by multiples of wall line width, stopping and leaving gaps when the offset operation yields an empty result. Coasting stops extrusion right before the layer is finished and the rest is printed with the remaining pressure in the nozzle. It gets even worse when I use Line Width bigger than the nozzle width (e.g. Unfortunately, this is the real world, not fairy land! Fill rate is too low . With the "current implementation" I'm referring to the normal distribution of Cura from Ultimaker. Can't "Filter Out Tiny Gaps" = unchecked just revert to the old behavior? It's a lot of work to do it right so please be patient. In stable Cura 2.3.1 this option is missing. 2 Phillips bit, a flat pry bar, wood shims, and a hammer. Unfortunately, it has absolutely no effect on this particular STL and a couple of others I just tried. Cura Print Speeds:-Infill Speed: 45mm/s Outer Wall Speed: 30mm/s Inner Wall Speed: 30mm/s Top/Bottom Speed: 25mm/s Travel Speed: 90mm/sec Initial layer Speed: 18mm/s Initial Travel Speed (for the first 1-2 layers): 60mm/s. I agree, it definitely seems to leave gaps unfilled that in your 2.7 image show as filled. G0 F7200 X-54.312 Y17.4 And afterwards it would draw a line there. I set "fill gaps between walls" to "everywhere". Going by a thousand or so line segments on a layer, you'd be unioning a thousand polygons together which is a quadratic operation. I was just curious if you have the capacity to escalate this issue to a higher support level because it's an inhibitory problem, if we have to abandon cura that's going to effect our next 3d printer purchase pretty heavily. Anyway, I wont be saying what i have to say anymore. Sign in I gave up on regular cura for a year over this problem, and came back to find an instance of "we solved it" followed by evidence to the contrary. Thank you Mark @smartavionics for these builds ! The solutions usually range from increasing extrusion temperature and width, slowing down print speed, decreasing fan speed, increasing infill percentage, or changing your infill pattern altogether. Hopefully the devs can get to the bottom of what code change caused this. Because currently, it does not. Heuristics like bounding box checking won't work very well since the polygons are long and thin. The slicer cannot fill this gap as its to small for the nozzle, so it is left empty. privacy statement. I'll see if I can formulate a better approach that would avoid extending the region in incorrect/unnecessary ways. Includes both FDM and SLA. Can we alternate print thin lines per layer? I will chose a place which accepts freedom of speech, opinions and ideas without fear of censorship. Got 3D printing issues? @ChrisTerBeke ? Actual Results When filling gaps, Cura will cause extrusion directly into the middle, already existing, printed wall line. As if the fill gaps between walls is almost not working. My problem doesn't seem to be exactly the same, so I'm not sure this is the right place for it, but if not we can move it/open a new issue later: Simple test case I have for this is https://www.thingiverse.com/thing:11895.
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