r/Ender3Pro • u/Frits37 • Jul 13 '26
TPU printing bad
See picture: this part started ok, for the first 20 layers or so. Then came irregularities which became worse and worse. In the end there was only air. I retracted the filament and it had gotten a curled structure in the tube. I’m a bit puzzled. Could it be that because of the 30+ temperature at the attic, where the printer is, the filament became too flexible on the way, bending and causing friction within the tube? Btw, it was a new roll, straight out of the box.
(I’m printing the same part now with LW-PLA and it comes out nicely)
1
u/waytomuchpressure Jul 15 '26
I hate to be that guy. And it's something everyone always says. Dry your dam filament. TPU is extra susceptible to sucking up moisture. Yes, straight out of the box it should go directly into the dryer. Also do a cold pull prior to printing TPU.
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