Thursday, January 30, 2014

Fan Cooling

So after my recent issues I decided it was finally time to get my fan hooked up to the electronics board.  I had designed my enclosure with a slot on top to fit a fan for forced cooling across the heat sinks. Up until now I have had a little dinky fan blowing through the holes in the end. Not really effective for anything probably.

I have a pile of old power supply fans. This one came out of a server power supply and is very powerful. I hook it to a 9V battery now and then for some rapid cooling on the spot.  I figured it would be a good match for this.

I designed this little adapter for it. Basically it takes the fan opening and channels it down to be a slot that matches up with the board enclosure. I printed the holes at the exact diameter of the screws knowing it would be slightly smaller as most inside diameters are when 3d printing. This smaller diameter allows me to treat the machine screws as self tapping (threading the holes as turned into them).

 Next I drew up this little fan shroud to make sure I dont stick my fingers in ;)

Stack them all up and it is complete. I "glued" the adapter directly to the enclosure using pure acetone and a q-tip. I went around the edge a few times to seal up any little gaps I saw. 

Well once I hooked this to my power supply I got quite the surprise. Sure I knew it was a few more volts but dddddaaa####*** this thing is so turbo you can feel the air blowing out any orifice from a few feet away.  Needless to say, I am going to install an inline switch and turn it on only now and then during longer prints. I might need to downgrade the fan a little since it is just so powerful.