UPDATED - Voron 2.4 CW2 (RC1) Filament Runout Sensor Mod

prusaprinters

<p>I print big things and the thought of wasting filament and time because suddenly, in the middle of the night, the filament runs out, is not something I am fond of. So I created a simple filament sensor mod for Voron's CW2 (RC1), using a 5.5mm steel ball and a microswitch.</p><p>The microswitch is a pretty common one but needs to have the mounting holes 7mm apart. I used one I found on an Ender 3 endstop board and removed the lever. You will need two M2 screws to secure the microswitch in the slot (don't forget to stick in the steel ball first!).</p><p>Only been using it for a very short time but it seems to be pretty reliable so far.</p><p>NOTE 1: I do not run the CW2 with a PCB so I cannot test and/or guarantee this mod will not affect the PCB mounting in any way. If you do print it and the PCB still fits, please let me know and I can update the description :)&nbsp;<br><br>NOTE 2: This mod is based on the RC1 version of Stealthburner. You can find the original source files on <a href="https://github.com/VoronDesign/Voron-Stealthburner">https://github.com/VoronDesign/Voron-Stealthburner</a></p><p><strong>UPDATE 13 OCT ‘22:</strong> Added a STEP file so you can adjust the model to your switch’s specs and ball diameter.</p><p><strong>UPDATE 17 OCT '22:</strong> Replaced STL and STEP file with support-less version that also includes a small opening in order to assist in switch removal (and is also a means to visual inspection of the ball and switch contact).&nbsp;</p><p>Here's an example code for the printer.cfg file:</p><pre><code class="language-plaintext">######################################## # Filament runout switch sensor ######################################## [filament_switch_sensor runout_sensor] pause_on_runout: True runout_gcode: G91 ; relative positioning G1 E-2 F2700 G1 Z10 G90 ; absolute positioning G1 X50 Y50 F3000 G91 G1 E-100 F1000 ; retract 100mm of filament insert_gcode: G92 E0 ; Reset Extruder G1 E50 F600 ; move filament down 50mm quickly G1 E150 F300 ; extrude 100m of filament slowly to get it through nozzle and purge event_delay: 3.0 pause_delay: 0.5 switch_pin: P1.28</code></pre><blockquote><p><strong>BE WARNED! </strong>This works on my own corexy printer with an SKR 1.3 board and the sensor connected to X+ port. My settings work with a standard V6 hotend. If you use it, do so at your own risk, and update what's needed so it runs on your printer. <strong>I will not be held accountable for any damage to your printer caused by your own actions.</strong></p></blockquote>