Yeah. I wish I knew more about those simulations. Is there any way you/anyone could measure this area by taping a probe to it or something? If this is the problem it could explain why the filament snags in the head before hitting the inside of the tip, and why some filaments work better than others. If the differences in deformation temperature are right on the cusp of deformation some filament types my deform more readily into any interior surface deformations than other types. The XT should consistently work a little better for you if it can withstand higher temps in the hot-end, the manufacturers claim it can withstand temps up to 70C.
I can't measure the temperature inside the teflon/nozzle connection. There is no way to reach in there even with the tiny temperature sensor I have here. I measured the temperature outside, around the height where the coupler and the nozzle should meet. It is about 110°. So PLA will definitelly expand if there is space left.
Also, it's np; it wasn't much trouble to actually do anything. Typing everything up took the longest. I hope you figure out the reason for your troubles soon, the ending to this thread is killing me :smile:
Haha, mee too
I moved my UM2 to the living room because my Ultimaker happy corner is too small for tinkering. Good thing there are no ladies around right now, the WAF (woman acceptance factor) is way too low around here.
By the way, printing the retraction variant didn't prove the theory. It even fared better than without retraction. Also the object on the left was at the front and features way more underextrusion than the on in the back. But I think that's just coincidence.
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aaronalai 2
Yeah. I wish I knew more about those simulations. Is there any way you/anyone could measure this area by taping a probe to it or something? If this is the problem it could explain why the filament snags in the head before hitting the inside of the tip, and why some filaments work better than others. If the differences in deformation temperature are right on the cusp of deformation some filament types my deform more readily into any interior surface deformations than other types. The XT should consistently work a little better for you if it can withstand higher temps in the hot-end, the manufacturers claim it can withstand temps up to 70C.
Also, it's np; it wasn't much trouble to actually do anything. Typing everything up took the longest. I hope you figure out the reason for your troubles soon, the ending to this thread is killing me :smile:
One more also, IF this is the problem it may be expressed at faster printing speeds if the extruder applies more column force to the filament via the bowden tube, forcing the filament to squeeze into surface deformations.
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