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Ender 3 S1 Hotend Fan 4020 Replacement Bracket — image 1
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Ender 3 S1 Hotend Fan 4020 Replacement Bracket

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A bracket to replace the 3010 hotend fan with a 4020 blower fan for the Ender 3 S1 to reduce noise but maintain cooling.

Rating
5 / 5
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186
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Updated at source:

Model information

License
Creative Commons — Public Domain

The Ender 3 S1 has been a great machine so far except for the loud hotend fan.  I had a spare 4020 blower fan so I designed this bracket to replace the one found on the sprite extruder.  Even at 100% I've found it to be quieter than stock, but was able to reduce it to 50% fan speed for even quieter performance while still maintaining proper cooling.

You will need the following hardware:

4020 blower fan - Fan that I used https://amzn.to/3GdBhSI

3 x M3 16mm screws to mount the fan

You will also need to get the old fan's JST connector onto the new fan.  I simply clipped and soldered the cables.

It prints in 2 parts and supports are not needed.  After securing the bracket be sure to tuck the cables to allow the x limit switch to trigger. I'd recommend manually testing the triggering of the switch prior to homing.  The small clip at the bottom of the probe mount is to tuck the part cooling fan cable if needed.

Fan noise comparison video: 

 

20/05/2022 - Moved the probe mount up 2mm since it seemed unnecessarily close to the bed when stowed.