Recently, my Ender 3D Pro has been unable to print any large models successfully with PLA as the filament starts to expand inside the Teflon tube, causing a clog after about an hour of printing. I am starting to suspect that the problem is heat creep.
- This occurs with the two brands of PLA filament that I use (3D Fila and Voolt 3D).
- The hotend that I am using is the one that comes with the printer, I don't know what it is made out of.
I have tried many things to patch this problem:
- Try to unclog it with the needle
- Replace nozzle (three times)
- Check if the Teflon tube is touching the nozzle
- Increase temperature from 200 to 220 °C
- Increase temperature from 200 to 215 °C
If the problem is indeed heat creep, I have plans to control the heat sink temperature with a Peltier and an extra thermometer. Any other ideas are appreciated.