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I recently upgraded my UM2 Extended to 2+ using the kit. And immediately started seeing under extrusion. This is my first 3D printer and I don't know if what I did is at all right, but what seems to have worked for me was carefully and BY HAND twisting an 1/8" drill bit up into the opening from the nozzle end (after removing the nozzle and Bowden tube). The drill bit diameter at the tip is 3.18 mm. I turned the bit into the opening a little at a time by hand, then pulled it out carefully each time (sometimes by hand, sometimes needing pliers to pull it out). I did that about half a dozen times. There seemed to be quite a bit less resistance when I tried pushing filament through the heated nozzle by hand (with the Bowden tube removed) vs before. I also put some Canola oil on the first couple feet of the filament before I inserted it into the feeder.
It seems to have made a world of a difference (although I can't say now which had the greater benefit - reaming out the PTFE bushing with the drill bit or the use of Canola oil on the filament). So far, I think my prints are coming out better than ever.
Again, I don't know if there are any deleterious effects from doing this but so far I'm happy with the results.
Upgraded my UM2 with plus kit now under extrusion
in UltiMaker 3D printers
Posted · Edited by Guest
I recently upgraded my UM2 Extended to 2+ using the kit. And immediately started seeing under extrusion. This is my first 3D printer and I don't know if what I did is at all right, but what seems to have worked for me was carefully and BY HAND twisting an 1/8" drill bit up into the opening from the nozzle end (after removing the nozzle and Bowden tube). The drill bit diameter at the tip is 3.18 mm. I turned the bit into the opening a little at a time by hand, then pulled it out carefully each time (sometimes by hand, sometimes needing pliers to pull it out). I did that about half a dozen times. There seemed to be quite a bit less resistance when I tried pushing filament through the heated nozzle by hand (with the Bowden tube removed) vs before. I also put some Canola oil on the first couple feet of the filament before I inserted it into the feeder.
It seems to have made a world of a difference (although I can't say now which had the greater benefit - reaming out the PTFE bushing with the drill bit or the use of Canola oil on the filament). So far, I think my prints are coming out better than ever.
Again, I don't know if there are any deleterious effects from doing this but so far I'm happy with the results.