Quiet Fan Grill/Cover 4040

prusaprinters

<p>I made this because I was tired of breaking fan blades but couldn't find a quite fan grill that was "perfect for my needs. Also I am learning FreeCAD.</p><p>This design keeps a gap between the the grill and the fan. The pattern I used for the grill is based on one of the more quiet yet sturdy designs from this <a href="https://www.pugetsystems.com/labs/articles/Effects-of-Grill-Patterns-on-Fan-Performance-Noise-107/">webpage</a>. I have included the FreeCAD files and you can edit things to make it custom for your fan.</p><p> </p><p>The two STLs I have include are:</p><ol><li><code>grill_creality_4040.stl</code><ol><li> This fits the fan that came with my ender 3.</li><li>The peg_diameter is 6.05mm</li><li>The peg_length is 2.5mm</li></ol></li><li><code>grill_amazon_4040.stl</code><ol><li>This is a fan a got from amazon, <a href="https://www.amazon.com/dp/B08TBWJNZ1?ref=ppx_yo2_dt_b_product_details&amp;th=1">this one</a></li><li>The peg diameter is 5.45mm</li><li>The peg_length is 3mm</li><li>These holes are shaped like a hexagon but the round peg fits very good</li></ol></li></ol><p>If you want a cover for a fan with different size holes you can look below or ask and I will see what I can do. Practice makes perfect.</p><p> </p><p><strong>How to Install to Fan:</strong></p><ol><li>Remove two screws, diagonal to one another.</li><li>Press on Grill</li></ol><p> </p><p><strong>To Edit the Pegs Diameter:</strong></p><p>Open in FreeCAD 0.19≥. On the left pane double click on the Spreadsheet and look for peg_diameter and enter the diameter(not radius) of your fans counter sunk hole. For a snug fit tolerance, subtract 0.05mm from the diameter.</p><p>Next measure the depth of the counter sunk hole and put that in the `peg_length' section.</p><p> </p><p>That should be all you need to change to make one for your fan.</p><p> </p><p><strong>To export Mesh STL:</strong></p><p>Select the body and got the mesh workbench, select “Create Mesh From Shape” under the “Meshes” Drop down menu.</p><p>Then select the newly created mesh in the left pane and left click “Export Mesh”</p>