RBJ magnetic cooling system

This is a simple magnetic cooling system which makes cleanup and accessing the hot end extremely easy. It uses 8 neodymium magnet for an old BLDC motor. They can hold 700gm-800gm easily, which is more than enough for this setup. We connect all the electronics using JST HX connectors. There are 2 5015 blower fans for the part cooling, we can set them to 50-60% speed, making the machine quieter and not losing any cooling.

Note: This design is for the stock ender 3, ender 3 V2 plate and other similar printers with stock hot end.

Update 15-5-2022

1. Added base plate for ender3 V2 (needs testing)
2. Added LED bar without threaded inserts



Part list

12mmx4mmx1.5mm magnets *8
5015 blower fan *2
4040 fan *1 (stock)
M3 10mm button head screw * 8
M3 5mm countersunk screw * 2
M4 20mm screw and nut * 2
2 pin male and female JST XHP-2 connector * 1 (optional)
4 pin male and female JST XHP-4 connector * 1
M3 3mm threaded inserts * 12 (can be done with using 7)
Wire
Supe