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Ultimaker Community of 3D Printing Experts


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  1. Sure, I understand what you mean: for precision and not having the plugin escaping the intended shape. But sometimes it's evident the part would be round if not for the low poly count (besides skipping treating the model part ). How does the plugin calculate the curved path? Tangent to the original lines?
  2. Now, how do I convert a low poly shape into a curved one? (like this shape attached) It seams like tolerance and resolution should do the trick. But if I configure resolution over 0.07mm, cura won't slice, whatever the tolerance. Overhang_Test_Solid.stl
  3. Hey! After changing that file line, I think Arc Welder indeed "fixed" Junction Deviation. Making some tests right now, but the part that always gave me zits before is completely smooth. No rattling during curved moventes and great corners. The only thing a bit different is that the extruder is more aggressive on the corners with linear advance. Give me some curved surface to test with that always gave you problems using JD.
  4. Solution for slowing too much before some curves (anycubic i3 mega-s with that firmware in the link, in my case): https://github.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/issues/80 henniero commented 8 hours ago I had the same issue. I found this thread in the reprap forum https://reprap.org/forum/read.php?415,869738,869785 I changed line 219 in Marlin>src>gcode>motion>G2_G3.cpp if (!planner.buffer_line(raw, scaled_fr_mm_s, active_extruder, 0 // "0" was "seg_length" in original version I replaced "
  5. Before it even showed the gcode file size savings percentage. Still didn't get any luck with my anycubic i3 mega-s. Could it be the minimal segments is set to 24? You can really notice the issue when printing a Benchy. The printer sloths at each lettering under the boat, not extruding (maybe because the printer is so slow that the extruder cant "keep up") or melding what it had extruded.
  6. @FormerLurker, I'm running a slightly modified version of Knutwurst's i3 MEGA (M/S/P/X) Firmware, based on Marlin 2.0.5, it seams: https://github.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S My board is also 8bit. Could that interfere?
  7. Can someone confirm this? when printing the first layer of a benchy (lots of curves on the letters) the printer slows down so much that the letters get melted, or the extruder simply is not that precise enough and cant extrude so little filament, leaving an under extruded first layer. It has no relation to linear advance, as I've tested with and without. Maybe it's my printer's firmware arc settings? // G2/G3 Arc Support // #define ARC_SUPPORT // Disable this feature to save ~3226 bytes #if ENABLED(ARC_SUPPORT) #define MM_PER_ARC_SEGMENT 1 // (mm)
  8. In addition to my tests, it seams Arc Welder aid some Linear Advance calculation issue where the printer would rattle a bit in inside walls (or maybe overlapping ones - I'm printing a 2mm curved shell), trying to compensate extrusion vs path, with not that smooth movements. With Arc Welder the printer must input the long arc for Linear Advance to calculate extrusion and movement is always continuous and smooth. That is such an improvement : )). Sometimes I still see the printer almost stopping at corners right before a curve, extruding absolutely no filament (LA in the works) but le
  9. Deleted. Sorry, had a hard time trying to quote my previews message. intended message below.
  10. I'm running a slightly modified version of Knutwurst's i3 MEGA (M/S/P/X) Firmware, based on Marlin 2.0.x: https://github.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S I don't think it has any new implementation of JD as on a recent update he disabled it.
  11. Testing junction deviation with linear advance and arc welder: First test: linear advance + junction deviation + arc welder + "G90 influences extruder" on. This caused the extruder to vibrate a lot on corners, with the XY movement almost completely stopping there. Gave up the print on the first layer afraid it could damage de extruder. Curved motion was smooth on the XY axis. Second test: linear advance + junction deviation + arc welder + "G90 influences extruder" off. Same. Maybe LA is causing the issue. Third test: junction deviation + arc wel
  12. Cool! Hope so : ) (the outermost is a skirt and the rest would be a 2mm cylinder) I'm preparing everything and finishing a print right now. Will come back with junction deviation results.
  13. There you go. Maybe it's just the graphical representation,? But this is what i see in NC viewer: normal.gcode with AW.gcode
  14. Oh sorry! That should be a circle. See the gcode with no WA. The one with WA shows more straight lines in the arc (if that makes any sense)
  15. First thig I noticed: in a high resolution model, with lots of polygons, Arc Welder actually made the model lower resolution. Am I interpreting something wrong?
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