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  1. Hi, Saw your message, I may be interested, What's your current (and the printer's) location ? Let me know, Thanks, Max.
  2. From what you're telling me, it seems like you had that issue but the opposite way (you had the teflon sitting too low instead of too high). So you may have had issue with the bottom of the teflon heated too much or not having enough pressure applied to it rather than the spring putting too much pressure on it .. I usually don't print at 0,2, but when I did (and the teflon was mounted the right way) I never had issue of infill lines not touching, so I'm not sure what problem you're talking about that is specific to ,2 layers.
  3. Huh, too bad, but I saw on a different thread that some printer came from the factory assembled the wrong way on that part, so depending where yours was assembled, you may have had this issue from the beginning .. If so, it would probably be worth it to replace the teflon coupler, even if not used that much, it had probably been under a lot more stress and pressure that it should have, which may have made it degrade much faster ... I'm still recalibrating everything, but I've had a couple prints coming out pretty great from the printer since modyfing this. Maybe I was having a different issu
  4. Ok, I don't want to celebrate too early, but I've been printing for about 2 hour now, and not a single issue, perfect layers, smooth as can be. So, still not fully celebrating as I'll wait for this part to finish printing, but I think it's safe to fill the fridge with champagne just in case !
  5. This thread is pretty old, but I feel like I may not be the only one who had that issue, and didn't find this info clearly explained elsewhere (but only parts of it on different threads). I very strongly believe (still under investigation but the first results are pretty encouraging) that this gap is actually crucial (which is why you should follow the assembly guide when replacing the teflon coupler and first place the teflon ALL THE WAY DOWN into the nut, then screw the nut into the nozzle until you get 1mm spacing between the teflon and the nut). From what I've seen so far, I think that
  6. Feels a bit stupid to rewrite the whole thing, and I haven't tested it yet, but this issue COULD be caused by an improper teflon coupler mounting, putting too much spring pressure on it, creating way premature use in the teflon coupler, generating the issues we've been experiencing ... I'm working on it right now, and will post the results if I get any, in the meantime you can check page 56 of the assembly manual (am I the only one discovering the very existence of that holy grail of a manual only now?!) on the head assembly, don't know how you did it, but I replaced my teflon coupler the oth
  7. I THINK I FOUND IT !!!! I just disassembled the head yesterday and replace the teflon coupler that was roughly a month old (yeah, I'd been printing a lot but still), and was a bit surprised to see how used it already looked. With the new one I've been able to print again, and it looks pretty perfect, but I just found out that the assembly manual (actually I first just found out there was an assembly manual for the UM2 available to the public !) that the teflon coupler IS sitting too high into the nut. I believe that the reason for that is that 'for me at least), when you replace your teflon c
  8. Would there be a way to "group" all the topics related to this issue ? I've found 3 "active" ones so far, and we pretty much all have the same issues, with the same fix suggested. I'm thinking it would probably be more efficient if everyone focused on a single topic page, that way we could probably avoid repeating some information, and group all the information in one place, and who knows, maybe the 39th page will be the one where we finally come up with a solution ! I found this post : https://ultimaker.com/en/community/view/9513-underextrusion-need-help-with-this-one?page=2 , and Illuminar
  9. While I was crying watching my printer staying idle, I stumbled upon this post : https://ultimaker.com/en/community/view/9513-underextrusion-need-help-with-this-one?page=2 The answer Illuminarti provides shows an assembly of the printhead/nozzle different than what I have going on now. I just dismounted everything yesterday and cleaned it out and reassembled it, so I'd like some confirmation before going ahead, but could that gap between the nozzle/nut make a difference ? And generate the kind of issues we've been having (like putting a gap "somewhere" inside that assembly, in which the melte
  10. I'm not sure now that I've been reading some many issue/fix posts, but I was wondering what firmware was everyone experiencing this running. I know that I would probably never have done the update if I haven't changed the electronic board, so I was wondering if maybe that could be linked to this ? I'm going to take the head apart this afternoon, not sure what I'll be looking for but it can't hurt to give it a look, especially since the printer is not working in the meantime ..
  11. Man, I was so full of hope when I saw this post going on for 38 pages, thinking that finally someone else was having the same issues as I did, and hoping that I'll find a fix in there, but unfortunately, I just got to the end, and no luck so far ... . I'm really struggling to find what could be going on wrong and explaining these issues .... As most who have this problem, I've already tried replacing ptfe coupler (like 1 month ago maybe), check the bowden tube, opened the feeder to clean it all up, but so far, nothing has made any kind of improvements ... What I don't really understand is
  12. Also, a couple of other "maybe linked" issues I've had so far : - Playing with the feeder tension. Took me a while, but I think I finally have the right level of tightness (and as soon as I'm printing reliably again I'm printing Robert's feeder and throwing this insanely designed one away ! ) - My belts seem to be tight, however I 've noticed an increasing amount of "black dust" beneath some of them. At first I thought that it was because I increased the traveling to 250, but it seems to be still going on. I can't see any obvious "use" on my belts, the teeth are still here and pretty sharp
  13. Hi everyone. I'm in the same situation as Esteban, getting pretty frustrated after trying to fix every single issue I could think of. I changed my ptfe coupler a couple weeks ago, along with a new electronic board, so I updated to the latest firmware included in the last Cura's release (the most unstable one I've seen in a long time, but that's not the issue now), and from then, nothing ever worked properly again. I'm getting the same kind of random underextruded lines on top infill, no matter the amount of layers. I tried different temp, different speed, double checked the filament diamete
  14. FINAL EDIT : This problem actually solved itself, as I ended up finding out that withthe new board I got, the electronics are wires in a different way that makes the rear fan only turn on when the nozzle if hotter than 40° ! (This is an awesome feature ! ). Thanks to anyone who took a look anyway, I'm letting this here in case someone had the same kind of issues, but if the moderators want to remove it, go ahead too EDIT : The firmware is now updated (through the 15.02 version, couldn't manage to do it with the 16 one ..), but I still can't get the main fan back on. Anyone has some insight o
  15. Swap_at_Z IS the solution !! Slice your model a first time, with bottom infill enabled. Save that gcode, uncheck the "bottom infill", load the plugin, set its start and end value to keep only the infilled bottom, and BOOM, problem solved !
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