MakerFarm Prusa 8" i3v Magma Cooling System

thingiverse

I loved the "MakerFarm Prusa i3 Magma cooling system remix" by PaperGeek but faced an issue with the M5 nut on the newer Prusa 8" i3v laser cut version. To fix this, I modified the STL files, reworking the wedge and main duct, turning the fan adapter on its side for easy printing, and sharing the results to help other i3v users. The upgraded cooling system reduces heating time from 10 minutes to just 3 minutes at 225°C. However, if you follow Colin's instructions for assembling the Magma hot end, ensure that the ceramic heater is positioned towards the back of the extruder trolley to prevent melting or deformation. To modify the cooling system, I imported the original STL files into SketchUp and made changes such as adding a rounded indent to the wedge piece, reworking the wedge part for stability, moving retaining tabs on the mainduct closer to the extruder hole, thickening M5 bolt sleeves inside the mainduct, and adding small tabs on the updraft exits of the mainduct. When assembling, I glued the fan adapter to the mainduct with acetone, sandwiched the Magma cooling fan between the fan adapter/mainduct assembly and the fan shroud using spare 30mm M3 bolts, and recommended tapering the leading edge of the wedge for easier insertion.