IKEA Lack Extractor Fan Assembly by DrLeFonque

Last crawled date: 3 years, 1 month ago

This is my first CAD design, ever. This is an extractor fan assembly designed to be used on an IKEA Lack enclosure setup. The aim was to have an extractor fan (or two) mounted on top of the enclosure to extract heat (for PLA) and fumes (for ABS) from the enclosure when required.
Updates
Update (2018/04/05): I printed out the bottom part of the fan assembly (IKEA_Lack_Extractor_Fan_Assembly_Bottom.stl) and noticed that there was a small 1mm gap between between the inner wall and one side of the fan mount. I've corrected this and uploaded the fixed STL file.
Update (2018/04/05): I printed the top half of the assembly (IKEA_Lack_Extractor_Fan_Assembly_TOP.stl) and found another error I made in the design. Whilst making the slot system so that both halves slot into one another, I forgot that this would take the height (excluding the flared ends) from 50mm to 48mm. Tomorrow I will correct of this and upload the new top half with an extra 2mm added to account for this.
Update (2018/04/06): I have made the 2mm adjustment to the top half of the assembly, the whole assembly should now fit precisely. I am going to reprint the top assembly over the weekend and verify that all the holes line up, then this should be a complete and functional build.
Update (2018/04/06): Added duct mount
Update (2018/04/09): The duct mount was a little too big for the hole it was meant to fit into, I have amended this and uploaded the fixed file. I've also confirmed that all the holes line up, so this is now a complete and functional build.
Parts
For this assembly I've purchased the following parts:
Scythe GlideStream 120mm PWM SC: https://www.amazon.co.uk/gp/product/B01D64OXA4/

The fan comes with a 3 speed controller switch that allows you to increase or decrease RPM's based on your needs. I'm going to be rewiring this to a control panel on the front of my enclosure (still working on this), which will allow me to turn the fans on and off and control the speed as required. There is a hole in the bottom part of the assembly to run the wiring through the enclosure.

Active Carbon Filter (2mm): https://www.amazon.co.uk/gp/product/B06XF5MWWK/

The active carbon filter will (hopefully) neutralise the ABS fumes. If this isn't the case then I'll make another top half with an adaptor where you can attach a duct and pump the ABS fumes out of a window or something.

Flexible Fan Ducting: https://www.amazon.co.uk/White-Flexible-Fan-Ducting-Extractor/dp/B011OOQ9PA/

Added a duct mount so you can attach some 100mm (4" in freedom units) flexible fan ducting. I've also added a notch around the mount to secure ducting with a zip tie (less than 5mm thick).

You'll need 4 x M3 screws and nuts to hold the fan and whole assembly together (including duct mount, if using). By my estimates, you'll need 40mm M3 screws (without duct) or 42mm screws (with duct).
Here are the TinkerCAD files, if you want to remix the design: https://www.tinkercad.com/things/25ztyGigLsC#/
As this is my first attempt at making a CAD design for 3D printing, feedback is welcome. Any suggestions on how to optimize the design for 3D printing is also welcome.