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lancebaa

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  1. Well, that sorts out one of my issues. There are still some more. I tried that Arachne version you mentioned, and it actually fixes the issue where horizontal expansion caused issues with "sharpest corner" seam alignment. If I were to combine my fix along with using Arachne (still haven't even tried building it), it may get be "good enough." I will say this, though... Simplify3D seems to have almost zero travel movements given the same model and similar settings. All this travel causes other issues with my setup that I have to compensate for (.8mm nozzles have issues with oozing, requiring extra priming after retraction, and then it depends on how far it traveled, etc... this is exacerbated by the fact that I print slightly hotter than usual in order to get prints out quickly)
  2. FWIW, moving the block starting on line 1811 above the previous block completely fixed my stringing issue: https://github.com/Ultimaker/CuraEngine/blob/master/src/LayerPlan.cpp#L1811 It certainly looks intentional based on the comments. Maybe conditionally doing it before/after based on the type of travel move could be a reasonable change (is it a comb? Is it combing over skin? etc etc). Either that or adding yet another setting.
  3. Would you consider the combing/Z issue a bug? I would, but there may be a reason behind it that I'm not aware of. Edit: Even with the Retract Continue, I get crazy stringing in the concave U shape due to this.
  4. I've attached an image of my seam issue when horizontal expansion is enabled. The white spots are the new layer starts. With horizontal expansion disabled, the white spots are all on the inside corner of the "feet" of the tunnel. It's too bad, because if I have horizontal expansion set to 0.45mm, it actually solves the original problem in this post, because the thin walls are no longer thin walls but "real" walls, so I don't get all those travel moves over open space. Here's a link to when I originally asked about the combing Z issue:
  5. Thanks for the tips. I'm trying that Retract Continue right now (hoping it helps with #2 below). I've run into two other issues tonight... 1.) If I enable Horizontal Expansion, the Z Seam Alignment setting gets messed up (I have Sharpest Corner selected). My only theory is that with the concave U shape, when it expands, some of the vertices get crossed, creating very sharp corners (this is not apparent when looking at the preview, though). So now the "sharpest corner" becomes part of the U shape somewhere as opposed to by the "feet" of the tunnel. 2.) You mention combing, and I've had this issue for over a year (as such I have been using Simplify3D, because this really messes up my prints)-----When it combs the print right before starting a new layer, it increases Z *before* the comb. I do not have z-hop enabled. This makes combing completely useless. All along that U shape I get strings galore.
  6. Small update with some of my troubleshooting... After looking through CuraEngine source, I figured out that the small polygons must have been part of a larger polygon at slice time, and yep. Small polygons are removed *before* thin walls are culled. If I enable thin walls, the features connect on those two layers (see screenshot), so clearly at slice time it was one big polygon on each of the two layers. However, the whole point of me wanting to exclude small polygons is to avoid travels and retraction. Even with the thin walls (one of them VERY thin) there are still travels and retractions for some reason. Not sure what the solution should be, but IMO small polygons should be removed after thin walls are culled (if thin walls are turned off). I realize that probably creates other problems, though.
  7. I have set minimum polygon circumference to 100mm (as shown in screenshot). It does indeed remove several layers, but there remain 2 layers for this particular small feature (isolated at each layer when sliced). See the area with some yellow and travel lines going to/from it. Using 4.12.1. Also attached my .3mf CFFFP_v2_n_11_25_30_deg.3mf
  8. This is actually two issues... the main problem I have is that right before a layer change, and before combing to the new location, the Z height changes. This makes combing useless, as there is nothing to comb against, so the result is stringing. Z-hop is disabled. It doesn't matter which combing mode I choose--the result is always the same. Previous layer's infill finishes; Z goes up; it "combs" to the start of the next layer; next layer's wall begins printing. What I expect: Previous layer's infill finishes; comb to start of next layer; Z goes up; next layer's wall begins printing. Now, the second issue is that the Preview *shows* exactly what I would expect. But when I save it and then open the gcode file, it shows the combing/travel happening after the height change (and this is what actually happens during the print). Attached are the "preview" after slicing (the one where the nozzle is level with the drawn line) and what it looks like when I open the same gcode file directly (nozzle already raised to new layer height). Both are the same layer. Both are at the very *end* of the layer. Also attached is the 3mf file. Please let me know if I did it right. CFFFP_v2_HO_28_18_deg_NEW4.3mf
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