Introduction:

I print a lot of ASA. I have an actively heated enclosure that gets up to 110F. On longer prints, the Einsy would throw an overheating code. My solution was to draw in cold air from the room to cool the Einsy. Nobody had designed one like this yet so I had to make my own. I do not recommend this for passively heated enclosures as you'll introduce too much cold air.

The blue tape you see in the images is to prevent the cold air from hitting the print and possibly warping it. The air escapes from the higher vents instead. Ideally, the air would escape from the top of the Einsy enclosure. But I didn't think about this until it was done being designed and printed.

You will need:

- x4 m3x20mm screws for the fan
- x4 or x8 10mm screws for the extensions

I recommend getting a kit of M3 stainless screws on amazon/ebay. It makes these sorts of mods a lot easier since you already have all the screw lengths you could ever want on hand.

- x4 1.8mm thick m3 square nuts (also recommend getting extras on Amazon or eBay)
- Zip ties for cable management
- 40mm 5 volt fan (Noctua NF-A4x10 5V)

File name explanation:

3mm_spacer_x2_needed → View images. You'll see how they're used

Einsy_base → edited Prusa Einsy base. Must be printed

Einsy_door → edited Prusa Einsy door. Must be printed

inlet_90_short → Connects to fan and intakes air at 90 deg angle. Non-extendable.

inlet_90_extendable → Connects to fan and intakes air at 90 deg angle. Connects to inlet_extension to give more length as an intake. This is how mine is set up.

inlet_90_hose → To be used with 1.5" ducting to draw in air from outside. Works perfectly with the WhamBamn enclosure. Here is a link to the hose I used

inlet_extension → Connects to inlet_90_extendable to draw in outside air.

Instalation & Tips & Tricks:

I print at high temps so I didn't use PETG. I used ASA. PETG warps badly. Almost all my printer parts are ASA now.

Glue square nuts in place (super glue, hot glue, soldering iron melt them in place) you don't want them falling out while trying to mount your fan. It's very frustrating.

The Einsy base now has a very thin extension for mounting the fan with the layer lines running in the wrong direction. It can be very brittle. be careful or you'll break it as I did. super glue fixed it.

I added a couple of slots for zip ties. This way you can tidy up all the wires and keep them out of the way of the fan. Please use them!

I included the fusion 360 source file. Remix away!

For 5v power view the last image. And read this text:

“As for power, use the Noctua NF-A4x10 5v fan and connect to two unused pins on the P3 connector pins 1 and 7, just above the filament sensor. See included pic with pins you need colored in. There are probably also 5V pins on the Pi connector if you're not using that. Option B is to source a 24v 40mm fan (Noctua doesn't make one, but they're out there).”

taken from: https://www.thingiverse.com/thing:2718553

Recommended changes & known issues:

- nut pocket on the inside of the case should capture the nut better.

- The mounting for the fan onto the case should be beefed up, it's too brittle and thin as is.