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Ultimaker Community of 3D Printing Experts


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  1. THX so much GR5 for your response! I did see this video before and since I just purchased the UM3 a couple weeks ago, I would like to avoid voiding my warranty if possible. The crazy thing about my printer and my two AA .4mm cores is that they have now both had this issue. I had the backflow problem 1st couple of days and MatterHackers asked UM to replace a defective core with a new one. Now a second one has failed? Over extrusion issues? In other words, does my printcore 1 over extrude filament? it would explain why my prints don't fail but the extra filament has to go somewhere? I am ab
  2. Hello everyone, I have been having a blast with my new UM3 in the last couple of weeks but the relationship has been love & hate so far. My main unresolved issue so far, which has happened 3x, is the backflow of filament during a print. I have had to clean the excess goo pileup above the nozzle on the brass plate which also stops me from easily removing the core in the printhead. The two clips to release the printcores need a bit of travel and if excess filament gook gets in there - it's almost impossible to remove the core without pliers or force. The weird thing is that
  3. Guys, Thank you so much for the tips and the video. This fixed my problem. This rocks. Thank you so much!! Cheers, Olivier.
  4. Hello Ultimaker community, I just got my new Ultimaker 3 this week. I am new to the 3d printing world and it's very exciting. Had a few issues to resolve before I got my 1st prints and I haven't tried PVA yet. My questions to you all is - Is it normal that when you load materials, the filament stops halfway through the transparent tubes? I have to wait for the motor to slowly pass it through to the printcores to see filament come out. Sometimes it doesn't and I have to reload it all over again. I find this process cumbersome and buggy. Any ideas on how to improve it? It seems
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