Nick__Mad

My bad. Turns out my nozzles were worn out into oblivion. Got myself new ones and that fixed it.

Hello community! Long time no see.🙃 So, my UM2 Extended+ was doing great until recently I encountered a bit of a problem. When I changed to my 0.4 ruby nozzle the printer stopped connecting the shell lines to the infill. (see pics with telegram logo) This came completely out of the blue. The printer was making great prints up until that moment. So I started troubleshooting. I thought that the nozzle was simply clogged and did several cold pulls. It was indeed clogged and I got it clean as a whistle. (see pink cold pull pic) The problem persisted however. So I thought that my feeder might have plastic debris in it (it did). I took apart the feeder box, cleaned the insides, greased the gears and slapped it back together. Didn't help much. After that I went looking through the forums to fin a solution. Saw some post saying that changing the TFM coupler solved the problem for someone. I coincidentally had a spare new one and mine was a tad worn out. (See pic) While I was changing it I cleaned and re-oiled the print head carriage. That helped significantly but didn't make the problem go away completely. Then I decided to try and switch to a regular 0.8 brass nozzle assuming that my ruby nozzle went bad (even though it should not be possible.) I started an led box print. The result was quite good but the "ears" I have made for the bolts still have the "disconnect" issue. And at this point I don't have much of an idea what else I can do to fix this. The only thing that helped me hide this "disconnect" is by enabling the "ironing" feature in Cura. The nozzle ironed out the top layers and hid the seam. But that's merely a cosmetic solution. (see pic with telegram logo that has no "disconnect") About the settings in Cura. I use defaults and only use roof\floor supports from time to time. I use Cura 4.8.0. Additionally, I have checked the tension on the short belts, and they are tight. I will include the stl files for the prints mentioned in this post Can you guys tell me how to fix this? (A link to images in full size here https://imgur.com/a/gwwDGJD) Bike_Led_Prefina_3l.stl Telegram-pins.stl

Could someone please remind me how to get rid of these artifacts? I remember that there is some sort of setting in Cura that addresses this particular issue but I can't quite remember which one. In case its hard to see in the photos there are some odd artifacts that are created when the printhead finishes and starts drawing layers.

Success! I think with even more tweaking I can get cleaner results. These are the settings i used. I had some issues with Ultimakers PLA for some reason the printer couldn't push the filament through the nozzle and the plastic stopped dead in its tracks. I tried to insert and eject it a few times until I swapped it for Verbatim PLA which did extrude and produced the prints in the image. This particular print was made with 220C and it turned out almost perfect. However, when I tried doing a second print with different PLA I realized that you were right in changing the temp to 180C because even at 180C the printhead melted the top of my print. I had to pause and let it cool for a bit and after resuming it finished properly. It seems that it depends on the plastic itself. I'm very thankful for your advice gr5.8)

Ok, that clears things up quite nicely. Thank you very much for the feedback. Quite honestly I wouldn't know what to do without your help

Hello, everyone. I am very new to 3D printing and I only recently got a UM2 Extended +. I had it for about half a year and I'm gradually learning how to operate it. I tried a lot of different materials and nozzles so far and I ran into a bit of a problem when I bought E3D's experimental 0.15 nozzle. E3D's 0.15 page E3D didn't really provide a detailed explanation on how to configure Cura to such a nozzle. They did list a few settings but then again they say to "set the nozzle settings to 0.15" which Cura simply doesn't have an option for. They also mention that they set the retraction settings to "1mm at 30mm/s" which is a bit confusing too because I looked into Cura's settings and wasn't able to find any settings I can alter related to retraction. After playing with the settings for a day and searching for any sort of reviews/tutorials on the web and the only thing I was able to find related to this topic is this thread Here is the forum thread itself where Ghostkeeper suggests to dig into Cura's cfg files and add a new profile by duplicating and editing an existing one. I tried doing that and couldn't get any results. When I started digging through the cfg files I got even more confused because I have no idea what the values in those files mean and I was unsure what kind of results it would give me. I once clogged my Olsson block with plastic due to my incompetence and quite honestly I don't want to get myself into that kind of situation again. Can anyone give me some pointers with this? This is very confusing. (i did contact E3D as well but wanted to get some extra opinions while they take their time to respond)