Quick Release E3D Fan Duct for Dibond Mendel90

thingiverse

A fan duct for cooling prints that serves as a viable alternative to the standard fan duct is available for those upgrading from the J Head to an E3D hot end, such as the v6 model used in my Dibond NopHead Mendel90. This version utilizes the same 60mm fan provided by NopHead. This design represents a second iteration of the original fan duct, incorporating a quick release mechanism and enhanced flexibility in terms of height adjustment, a feature that many users requested following its initial release (refer to http://www.thingiverse.com/thing:491316). I have designated it as a work in progress because despite functioning well, issues with the release lever snapping off due to ABS's brittleness have been encountered. A test print using Bridge (Nylon) material is required to determine whether this resolves the problem. Although the lever can be repaired by applying acetone as an adhesive, I have found that even when snapped off, it still operates effectively, held in place by friction. Depending on your machine's tolerances, you may need to apply a bit of tape over the top to ensure a tighter fit. Please note that this design will not accommodate a Sturdy Mendel90; it is specifically designed for use with a Dibond Mendel90. If anyone successfully modifies it to suit a Sturdy Mendel90, please inform me so I can include a link to your adaptation. Build Instructions Both the fan and bracket can be printed without supports, depending on the settings and slicer used. In fact, I recommend avoiding supports as they will pose a challenge to remove. ABS or Nylon materials are suggested for printing this design due to their ability to withstand high temperatures near the extruder. The standard 60mm fan supplied by NopHead can be utilized; however, I opted for shorter bolts to prevent interference with the belt. Standard nylock nuts were used on the bottom of the bracket but regular nuts were employed on top to allow more space for the belt. Alternatively, you could flip the bolts around and recess their heads instead of using nuts, as suggested by daichiasuka in the comments section of the previous fan duct design. While this approach is less aesthetically pleasing, it may be a suitable compromise if you prioritize functionality over appearance. Usage Instructions The bracket part slides down from the top over the two bolts originally holding the previous fan duct on the X carriage. You will need to loosen these bolts enough to allow the bracket to pass by the motor PCB bracket. With the bracket at its midpoint of height adjustment, tighten the bolts. Next, slide the fan duct up and into the bracket from the bottom until it is fully inserted. The release lever should then secure the fan duct in place. You can adjust the height to your preference. To release the fan duct, disconnect it, gently press on the release lever, and pull it downwards.