Prusa style optical endstop filament sensor

prusaprinters

<p>So I wanted a simple filament sensor (well two actually) that would use a simple optical endstop. I'm running a Duet board so this is easy to configure as a run-out sensor.</p> <p>I decided on using this flag approach as I found it more consistent than having the filament pass through the sensor.</p> <p>I was inspired by the Prusa approach. So far it's working well for me.</p> <h3> Post-Printing</h3> <p><strong>Assembly of the sensor</strong></p> <p><div><p>I used M3 screws/nuts to assemble. The magnets are 2mm x 8mm dia</p> Push the magnet in to the flag. Put the flag in the body and use a M3 x 10mm screw to fix in place. Don't over tighten, it just needs to pivot around this.</div></p> <p>Put the other magnet in place ensuring it repels the one in the flag which in turn pushes it away. I used a little glue to ensure it holds in place.</p> <p>Put the optical sensor in and fix in the body.</p> <p>Offer up the cover and fix the sensor in to it then finally use a M3 x 20mm bolt through the two halves.</p> <p>There are holes in the base so you can fix it to your own bracket design.</p> <h3> How I Designed This</h3> <p><strong>I designed this for 1.75mm filament.</strong></p> <p>This was done for my specific needs. I will look to improve the design such as add a wider entry hole for some tubing.</p> Category: 3D Printer Parts