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Ultimaker Community of 3D Printing Experts


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  1. Hi guys! thanks a lot for your info! I'm gonna try a needle with 0.4mm or less. Isn't a wire brush too abrasive for the inside of the nozzle? I read somewhere that if you get abrasive materials into your nozzle, the plastic that you'll print after, will tends to stick a lot more to the irregular walls of the nozzle.. Smithy, yes I agree, the print core is too fragile, but you can operate it by always grabbing the heating block, but yes, it's definitely not recommended taking the extruder apart. Will check that, thanks a lot!
  2. Hi everyone, Today I got my AA 0.4 extruder of my UMS5 completely clogged, tried cleaning it with clean filament (hot pulls and cold pulls) but I can't get anything out.. It even exploded a little bit of filament through the top of the extruder away in on of the pulls, when I was trying to push the filament down. I already disassembled the nozzle form the extruder, and now I wonder if is it possible to only purchase a nozzle instead of a complete extruder.. If yes, where? Is there other better options, like switching to an Olsson Ruby nozzle?
  3. Oh no.. I tried to print on PLA a simple object right after tried a small Nylon object and now the extruder is clogged and I can't unclogged it, even with clean filament.. What do you suggest to unclog the extruder??
  4. Hi everyone! Just bought a filament from the Smartfil brand called "NylonStrong" and I was wondering how bad can the filament affect a standard AA 0.4 nozzle. This filament is intended to print between 250 / 260ºC and the printing bed should be at 90 / 100ºC. The brand even advises: What are your thoughts? Should I definitely not print using a standard AA 0.4 nozzle?
  5. Hi everyone! I have a UMS5 and I can't print more than 2 to 3 layers of Timberfill® wood filament.. The first 2/3 layers it prints really well and then it just clogs 😞 The filament was put on the oven at 50ºC for 3 hours to remove any possible moist, just like Timberfill® suggests: I have a 0.4 Nozzle and my current setting for the wood printing are the follow: Layer Height: 0.2mm Printing Temperature: 175ºC Build Plate Temperature: 47ºC Print Speed: 70mm/s (walls/infill/initial layer) Retraction S
  6. Thank you! The issue was solved by doind that!
  7. Hi, I'm currently trying to print a model, but everytime I multiply it Cura gives me this first layer's "bug": As you can see both top and bottom multiplies are ok with a all filled initial layer, but the models in the middle are missing some lines in the first layer.. Anyone knows why this happen? Thanks!
  8. Hi Bobkelley22, You still having the same issues? Sorry for taking so long...
  9. Hi everyone! I'm currently trying to print a model that after Slice shows some small weird print moves that I want to get rid of so it prints a bit faster. I attached a photo so you can better understand what I am talking about 🙂 What can I do to change it or is it completely necessary? Thanks!
  10. And there it was the problem! I printed 2 tests: 0.2 and 0.3 layer height, and everything worked great! Thanks everyone!
  11. Hi everyone, This printer is from my company and I got to use it for a while now. I recently discovered that the screws that create tension in the feeder where misplaced, making both feeders to have the tension indicator at the top.. As soon as I fixed the screw and placed the tension indicator at the middle I printed a test object at 0.3mm layer height and the print was successful 🙂 I'm going to try a bigger print tomorrow at 0.25 and see how it goes! Thank you for your suggestions!
  12. Hi! I'm printing with normal PLA and this is happening with both extruders. Doesn't matter if I do a 2 print core job or not, the problem sustains in both works.. I tried to use the "Default Fast 0.2mm" or the "Draft 0.2mm" without changing anything on the profiles but the problem sustains.. I didn't tried PVA in a looong time. I'm using AA0.4 for PLA and other materials, except if I want to print with PVA I would change to the BB0.4 print core :) I cleaned all the print cores with hot/cold pulls with cleaning fillament. Weird is that
  13. Hi! Was this issue resolved? I'm having a related problem here.. When I print with Cura default profile Visual 0.15mm all my prints are perfect, even with the 70mm/s speed, but as soon I try to change to an thicker layer height all goes wrong. I tried to reduce a lot the speed (40mm/s) and increase the flow rate (150%) but the prints just fail due to under extrusion. The printer gets the same old "some material appears to be missing" error and it's a crucial error, because after that error all layers in the gap where the error happened will delaminate.. I
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