Thingiverse
Prusa Original MK2 fan nozzel
by Jimbo70
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This is a modified Original Prusa MK2 fan nozzle shroud.
The original fan nozzle did not fit well and also directed too much cooling toward the heated nozzle. This resulted in THERMAL RUNAWAY and lowering of the hot end temperature during printing.
I fixed my THERMA RUNAWAY ( and improved my PETG printing) problem by doing 3 things:
1. Using the newest firmware version 3.1.0 (Nov 2017) there is a thermal calibration for the PID. I did a calibration for 240 degrees (for my PETG filament) a
The original fan nozzle did not fit well and also directed too much cooling toward the heated nozzle. This resulted in THERMAL RUNAWAY and lowering of the hot end temperature during printing.
I fixed my THERMA RUNAWAY ( and improved my PETG printing) problem by doing 3 things:
1. Using the newest firmware version 3.1.0 (Nov 2017) there is a thermal calibration for the PID. I did a calibration for 240 degrees (for my PETG filament) a
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