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Ultimaker Community of 3D Printing Experts


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  1. So - regarding resolution, isn't it another way to set things up to obtain what is requested?! IF - guess there's an awful lot of job behind that - but if we could divide the perimeter into e.g. 0.02 mm layers, finish 5 of those - and then make the infill in 0.1 mm... That should save a lot of time but still get us the surface finish we want.. Is this possible?... From my point of view most likely a nice to have thing as 0.1 mm resolution is very fine for me.. Of course, chamfers and radius would look better in higher res. But with this method it should be possible to speed up normal prin
  2. Nope, not reasonable... I have made the same observations but not in the same way. I put each pulley up in my lathe and watched them. On one hand I just clamped them into the chuck and looking at the center hole - how much it moved. Secondly, to really reveal the truth I put them up on a fitting shaft and then looked at the cogs moving. They are not well made. They are off center and the outer pieces that are pressed onto the center part (the cogs) are not centered either. However, the outer parts to not matter but the off center of the through hole matters. On top of this - the through hole
  3. I have to test that - hollow parts - to identify how the shrinkage occurs. If it comes down to shrinkage I definitely have to do something about my fan. It is way to "unfocused" . I Think I will try some variant of cross-flow maybe combined with a improved fan shroud. Have you improved your fan, and in such case - did you see any improvement? Regarding the major improvement in precision I believe that in my case it comes from changing the pulleys and getting new shafts. My old pulleys wobbled a due to the through hole being 0.1-0.15 to big, and not always centered. Moreover, the origina
  4. Thanks, I did all the changes at once. The pulleys on the UM i received were not reaching for high precision... so I bought the GT2 instead. In the old config I printed the rest of the parts and then I started the rebuilding. The PLA will not get affected by the PSU. It leaves very little heat and as I have mounted it vertically the excess will not pass the PLA in high degree. If I would consider the PLA being affected it will not result more than tops 1/2 degree.. Nothing to worry about. The next step is to modify the tension devices a bit. I'm thinking of making one of the sides fixed
  5. So finally I got around installing UM upgrades. Calibrated my machine and I'm very happy to say I reach a resolution of +-0.05 mm. Actually more of measure error... So what have I installed: Direct drive. I bought a set of GT2 pulleys, belt and new 8 mm axes. I created a simple but sturdy enough holder for the motors. The setup allows for mounting the brackets first, attaching a part to a motor and then fixing the motor. Also leaving a bit of self adjustment due to some slack in the holes (just for alignment during mounting). I installed Chopenmeister "twister blocks" and design a ne
  6. Okey, I tested that - looks are really nice!!.. But, I think I got misunderstood, or I didn't find it. The thing I like in Simplify3D I'm asking for is - without importing any model or anything else - being able to connect to the printer and control it. Maybe I did something wrong but I didn't find a way to bring up the printing interface without submitting a model to be printed. Nice to do bed leveling in a personal way depending on how your table is setup. Well, of course I can just do it on the Ultimaker but for me it feels nice to do it on the screen.. Of course this will be of no functi
  7. Ok - I fold. You mention one thing that I didn't think of. That is the corners. If that would not have been an issue I would gladly have proved it to you. And - having that in mind I concur that the triangle hex infill is much better.. Will that be up for selection in the future or is that put on ice? Thanks for valuable input!!
  8. Thanks for input! The hexagonal fill pattern I would like because it is the strongest fill pattern. I don't have the exact numbers but e.g. using an infill of 20% rect could be interchanged to 15% hex pattern - still yielding the same strength of the part. Faster printing and less material. The part becomes much more resistant to twisting as well. Good considering warping. Prove it - well - The hexagonal pattern is much better resisting collapsing of walls as the stresses are distributed in more directions. Short description. This is my job - I do load-stress simulations. Well - of co
  9. Thanks for reply/comment. RC's - where do I find them. I looked at Github but did not figure out where to find it and what to do... I then looked in the Cura 14.01 I run, and followed the preferences and expert settings leads you gave. Did not find anything there, so I guess I have to download a development version to get these properties ?
  10. I've been using both Cura and Simplify3D for some time now. The print quality is absolutely the best in Cura as it seems to have much better compensation for changes in acceleration. However, there are some things I would like in Cura: 1) A machine interface so that when you start Cura you can push a button to connect to the printer and thereby control the bed and nozzle so that things get setup while you are doing other stuff. 2) A way if controlling print speed between different layers. Maybe the program could automatically calculate so that the print speed would be proportional to the ti
  11. I'll come back as soon as I have testet. I have found a place where I can buy natural anodized aluminum having a coating thickness of 10-12 microns. However, The first test I will do is just to cook the aluminum in hot water for 1/2 to 1 hour. This will give me a thin oxidation, which is approximately the same as anodization. However, the thickness will be 0.1 microns, tops.. I will try again printing without any tape and to see if I can get any control of it.. :-)
  12. I have updated the heat bed with a copper sheet under the basalt bed. By doing this I have decreased the temperature spread. I Now have a max 5 degrees difference to the center of the platform. Nice - will lead to much less warping. However, the thermal difference to the center of the platform varies over the surface - not being a constant drop of as a function of distance from the center of the plate. This implies that the thermal conductivity varies quite significantly over the plate. Measuring the temperature I find that in one corner I have a temperature 1 degree below the center of the p
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