Ender 3 S1 Aux Cooling Triple 5015s V1

Even with my 5020 part cooling fan, I found scenarios where it still couldn't provide adequate PLA cooling.  Particularly when I tried to print 150+mm/s or had certain bridging & overhang scenarios.   I also had a few spare 5015 fans laying around, and thanks to boredom, this creation was born.   

Disclaimer - my printer is obviously not stock, and I am not sure if this bracket will mount correctly on your printer's X axis gantry.   The mounting holes for it are 4mm, and are spaced 200mm apart.  I would suggest measuring first before you try this mod.

For fastening the fans, you will need 3mm screws of various sizes (20 and 25mm length if I recall).   

Photos show a Benchy without and then with the fans on.  Exact same gcode was used for each.   Printed at 150mms on my Ender 3 S1 with a 0.6 mm CHT nozzle.

Extra details:   You can run these fans in “on/off” mode, or wire them to a mosfet board that accepts a 3.3v signal and provides connections for 24v PWM.  Then use Klipper and one of the pins from your motherboard (PA13 or PA14 on a stock Ender motherboard) to use as the signal.  This will give you variable speed capability.   Sometimes 100% on these fans is a bit too much :)   Also you can setup a “multi-pin” config in klipper which would make these fans work at the same speed and same time as your regular part cooling fan.   Happy tinkering!

Updates:

• 05/23/2023:  Updated the rail bracket to be about 5mm lower to help avoid the ribbon cable from hitting it.