MK3 RHD Fan Duct Rev. C
Description
Nozzle Support updated to Rev. C Nozzle support has been adjusted to fit the existing screw length to the fan as desired. Update of MK3_Nozzle_RHD Revision C . Adjustments on Rev. C. An more even distribution of air flow between right and left sides. The internal geometry has been changed to reduce the risk of stringing in the air ducts. The air ducts in the front of the nozzle have been made a little bigger. A notch for the fan's "joint bump" has been added to the collar of the air nozzle. The front part of the nozzle has been made a little stronger to minimize heat defects on the left front of the nozzle. What causes heat defects on the front left part of the nozzle I do not know yet. It can either be due to heat radiation from the open cable end of the heat cartridge, or it is because the extruder fan sucks warm air up and past the tip of the nozzle. This defect is also found on Prusas R3 nozzle, but due to another design of the nozzle, the defect becomes slightly smaller there. I think the air nozzle of the Prusa MK3 can be improved, and this is my contribution to this. The front of Prusa's original nozzle R3 blows the air forward / downward and at the side of the extruder nozzle. I think the air should blow more towards the tip of the extruder nozzle to quickly cool down the extruded filament. To help me construct such a nozzle, I have used a flow simulation program, Autodesk CFD. The program calculates the air flow through the nozzle and then graphically reproduces it in different ways.
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