Nano Filament Runout Sensor

Nano Filament Runout Sensor

prusaprinters

<p>I wanted to use an extra microswitch I had (these: <a href="https://smile.amazon.com/dp/B088W8WMTB">https://smile.amazon.com/dp/B088W8WMTB</a>) as a filament runout detection sensor, but most designs I found were either too bulky, used a different style switch, or made for a specific printer.</p><p>Since taking the pics and uploading, I have shrunken the design even further. The body is now 25.1 x 11.65 millimeters.</p><p>Heavily inspired by eussrh's design (<a href="https://www.thingiverse.com/thing:1698397">https://www.thingiverse.com/thing:1698397</a>). After finishing up the design and looking back for their Thing, I did find a couple other designs that are essentially the same as mine! This one (<a href="https://www.thingiverse.com/thing:4260567">https://www.thingiverse.com/thing:4260567</a>) I didn't find because I was searching for "microswitch" instead of "endstop" sensors, and this one (<a href="https://www.thingiverse.com/thing:2665162">https://www.thingiverse.com/thing:2665162</a>) I ignored in the search results because of the name. They are both great designs and the remixes might have exactly what you are looking for!</p><p>&nbsp;</p><p>Also included is a version with a hole for an M3 T-nut mount to a 2020 extrusion if you want a fixed position sensor. This is the one I'm using for my reverse bowden setup on my Mercury One Ender 5.</p><p>BOM:<br>1x Microswitch - levered<br>2x M2 SHCS, 5mm or 6mm length<br>2x M2 hex nuts<br>Some cable with a connector to interface with your board</p><p>OPTIONAL:<br>1x M3 SHCS, 8mm length<br>1x M3 T-nut</p><p>Printing notes:</p><p>I designed this to be printed without supports. The hex nut holes and the directional arrow are 'stepped' so that they can be bridged easier. It's a nice design technique for 3D printing that I don't remember where I saw it first.. but I sure didn't come up with it&nbsp;</p>

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