Based on Prusa MK3 R3 - updated Extruder with 40x40x20mm fan open Idler and improved airflow
thingiverse
This is based on the Prusa MK3 updated R3 Extruder, released August 3, 2018. It features: - A 40x40x20mm fan mounted without compromising print volume - An improved cooler heatsink for the hotend due to enhanced airflow and increased pressure - A cooler extruder motor as some air flows into the idler compartment - No heat creep is experienced - More air, more pressure, with the same silent operation and print volume maintained - Improved airflow achieved by removing obstacles - Measurements taken before and after with a Flir heat camera
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