Universal Einsy Box Mosfet + Neopixel module V2

prusaprinters

<p>[04/30/2020] I have completed assembly of this on my bear frame. As a result I've made a few modifications to the files to allow for better wire feeds and easier access to one of the screws. Installation is still not trivial and I found my power cables to be a little shorter than desired. They were cables I had previously replaced when I switched to my meanwell power supply so I can't comment on the stock cables. My first test heat cycle used a meanwell 12v 320W power supply and got the bed with a Thekkiinngg textured sheet to 100deg in 6 minutes. I didn't capture the before speed.</p> <p>++++++++++++++++++<br/> I've created a new module for JuanPuchol's Universal Einsy Box (<a href="https://www.thingiverse.com/thing:4231370">https://www.thingiverse.com/thing:4231370</a>). This module will house a BIQU Power Expansion Board (Mosfet) for the heatbed. I still have an MK2.5 with 12V heater, so this should be useful to me since I previously fried one of the mini-rambo connectors. It will also hold Chris Warkocki's NeoPixel board on the top. I don't have one of these, so I can't confirm there is no interference with an einsy or skr or other board.</p> <h3>Print instructions</h3><p>I printed in PETG @0.2mm layer height. I had a little issue with warping, but might just be my printer setup. The print in the picture is a previous rev of the model. I made a few adjustments but have not yet reprinted it.</p> <p>Here is the Bill of Materials:</p> <p>For the mosfet:<br/> 1x Heatbed mosfet: <a href="https://www.amazon.com/BIQU-Heat-Power-Module-Expansion/dp/B083Z79TN5">https://www.amazon.com/BIQU-Heat-Power-Module-Expansion/dp/B083Z79TN5</a><br/> 2x Wago Connectors - p/n 222-413 (<a href="https://www.amazon.com/222-413-LEVER-NUTS-Conductor-Compact-Connectors/dp/B07JJ6JGTV/ref=sr_1_2?dchild=1&amp;keywords=wago+222-413&amp;qid=1587917305&amp;s=electronics&amp;sr=1-2">https://www.amazon.com/222-413-LEVER-NUTS-Conductor-Compact-Connectors/dp/B07JJ6JGTV/ref=sr_1_2?dchild=1&amp;keywords=wago+222-413&amp;qid=1587917305&amp;s=electronics&amp;sr=1-2</a>)<br/> 4x m3 hex nuts<br/> 4x m3x0.5x8mm cap screws<br/> 12 or 14 gauge wire. The mosfet likes stranded wire and the wagos seem to do better with solid core. I'm using the stranded wire that comes with the mosfet.</p> <p>For the neopixel board:<br/> 4x m2.5 hex nuts<br/> 4x m2.5x0.45x8mm cap screws</p> <p>For the cover:<br/> 2x m3 Square Nuts (DIN 562) Same as ship with Prusa Printers<br/> 2x m3x0.5x8mm cap screws<br/> Note that I largely copied the geometry of the Pi 4 UEB case which might have been setup for a 3d printed pin to snap in?</p>