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Ultimaker Community of 3D Printing Experts


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  1. Why?! Tesselating a model is more complex than slicing a model, gives inferior results and causes numerous other problems.
  2. Is there any effort in making Cura load Step/IGES files in addition to mesh based formats like STL? Advantages would be: - No tessellation step in job-preparation needed and no need to handle tesselated files of the CAD design. - no unclean representations of curves, esp. holes and filets. - the possibility to use G2, G3(Arc) and G5(Bézier cubic spline) commands to create leaner G-code. OpenSource 3D modeling kernels that can load STEP/IGES-files exists.
  3. Hello, I’m normaly using coasting with great results, but just realized it probably can cause problems. In a printed part (see detail in images below) the left wing was totaly messed up, while the right one printed O.K. I’m assuming that’s a result of coasting enabled, because Cura sets the coasting gaps exactly at this overhang.
  4. On a cartesian printer you have to set the steps per mm correctly. On a normal printer these can be calculated from the properties of the stepper-motor, the pulley, the belt and microstepping-settings. On a delta printer you also have to set delta-radius and rod-length correctly, which can be quite complicated.
  5. With “by hand” I meant, that it’s not done by Cura. 🙂 As in nearly all cases, the amount of filament the hotend can deliver is the limiting factor to printspeed(s), Cura should be able to handle this.
  6. On all 3D-printer I have worked so far (even the Ultimaker), the print-speed is not limited by the head-movement, but by the maximum amount of filament the hotend can meld. As far as I can see there is no way to specify this in Cura (other slicers can do this). So I have to do the math by hand every time I change settings. This is annoying. __________ Example for a printer that can meld about 4 mm³ PLA per second: 60 mm/s speed, 0.15 mm layer height, 0.35mm extrusion-width → 3.15 mm³/s | O.K. first layer: 0,3 mm layer height, 30 mm/s speed, 150% initial layer l
  7. ‣ Push the collet down ‣ insert the bowden and push it in with some force ‣ pull the collet up (with some force) while still pushing the bowden down ‣ insert the clip The original clip is 1.4mm thick. I designed clips with 1.5 mm, 1.6 mm, 1.7 mm and 1.8 mm to increase tension on the collet if necessary. Ultimaker-3-bowdenclip-1,4mm.stl Ultimaker-3-bowdenclip-1,5mm.stl Ultimaker-3-bowdenclip-1,6mm.stl Ultimaker-3-bowdenclip-1,7mm.stl Ultimaker-3-bowdenclip-1,8mm.stl
  8. The feeding is not blocked and all parts are originals. Even if it blocks I would expect the feeder to grind the filament (as reported frequently) instead of pushing out the bowden. I think I installed it correctly. I’m quite sure there is something wrong, but I don’t know what. Therefore the question about where the rotation should be absorbed.
  9. It is visibly worn out. We already cut it several times and then replaced it together with the collet. I just shortened the new bowden the second time. This helps for a short time, but then it happens again.
  10. It did it again… Is anybody able to shed any light on this?
  11. I disassembled (and reassembled) the feeder. Seems to be O.K.: no wear, broken parts or cracks as far as I can see. My assumption is, that if the printhead moves, the bowden transmits the head movement to the collet as it is quite stiff. Over time the bowden-collet connection wears out and the bowden wiggles out of the collets. Which part is intended to absorb the bowden movement, esp. the rotation? Should the collet rotate in the feeder-case, should the bowden rotate in the collet or should the bowden akt as a torsion-element?
  12. We primarily print with PLA. I don’t know if it happens with other materials. Yes, the retainer-clip is in place. We changed the “white plastic thingy” (https://www.igo3d.com/Tube-Coupling-Collet) when we changed the bowden. igo3d is a official ultimaker reseller (https://ultimaker.com/de/resellers/de), so we assume both the tube coupling collet and the bowden are original parts. And, btw., it first happens with the parts that were mounted when we purchased the printer.
  13. Hello, Our UM3 started to push out the bowden-tube from the feeder during printing, destroying the running print. We cut the end of the bowden, this worked for one print sometimes. After doing this several times, we replaced the bowden and the coupling-collet on the feeder-side. This worked for some time, then the printer pushed the bowden out of the feeder again. This happens without visible reason: no clogged nozzle, etc. I would have expect that the feeder would rather grind the filament than push the bowden tube out of the feeder. Any hint?
  14. Yes, that was the 100% problem. But the 1 % – 99 % problem remains. Cura does not generate infill between the inner and outer wall of the cylinder.
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