Ống dẫn gió tản nhiệt hotend cho Qidi Plus 4

Preamble

I had originally posted this on Thingiverse and a number of others have shared it here.  Since I now have a stable presence here on Printables I guess I should share it here as well.  The fact that others were sharing it wasn't bothering much, so long as they don't claim it was their design.  Anyway, time to set things right a bit.

Introduction

The Plus4 can sometimes suffer from Heat Creep in certain conditions. This duct/plenum attempts to better route the air from the intake fan over the heat sink to minimize the risk of heat creep for parts with many fine retractions, or at certain filament temperatures.

By default, there's about a 10mm gap between the outlet of the fan, and the surface of the heat sink, and there's many paths of lesser resistance for the air to flow, instead of through the heat sink. This design is intended to be a snap-in-place piece that minimizes the air-flow loss and better cools the heat sink.
 

Installation

First unplug the hotend cable plug from the print head board, and release from the sliding clamp that holds the cables in place (ie. about mid-way along the cable length)

Now, very gently, move the cables out of the way, and install the duct as per the photographs. Push the duct in place until it seats firmly against the extruder. It may help to hold the fan cable to the side (left) of the long tip of the duct such that it is not bending the fan cable excessively.

Now slide the hot end cables back onto the clamp, and re-plug back into the print head board.

Print Settings

Best printed in ABS, ASA, PC, or PPA (HT Nylon), with a 0.2mm LH, and 100% infill**!**