Filament runout detection

prusaprinters

<p>Finally got around to build something to deal with running out of filament when printing from Octoprint (not direct from SD card) on my Ender 3 Pro.</p> <p>I created this bracket to use with the following switches: https://www.amazon.com/gp/product/B00MFRMFS6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&amp;psc=1</p> <p>I connected the two outer most connections to my raspberry pi as you can see in the pickture.</p> <p>The housing for the pi is: https://www.amazon.com/gp/product/B081N3V6BH/ref=ppx_yo_dt_b_asin_image_o06_s01?ie=UTF8&amp;psc=1</p> <p>Connect it to physical pins of the pi (4B) as shown in the picture.</p> <p>The wire guide STL is a nice to have if you want to guide the wire to the side of the frame.</p> <p>I use the filament sensor reloaded plugin for Octoprint and have included a screenshot for the settings for the plugin.</p> <p>You will also have to tell Octoprint what to do when a print is paused (for you to change filament):</p> <p>{% if pause_position.x is not none %}</p> <p>; relative XYZE</p> <p>G91</p> <p>M83</p> <p>; Lower extruder temp</p> <p>M104 180</p> <p>; retract filament, move Z slightly upwards</p> <p>G1 Z+5 E-5 F4500</p> <p>; absolute XYZE</p> <p>M82</p> <p>G90</p> <p>; move to a safe rest position</p> <p>(use X0 and Y0 depending on your printer)</p> <p>G1 X220 Y220</p> <p>{% endif %}</p> <p>And what to do when resuming a print:</p> <p>{% if pause_position.x is not none %}</p> <p>; relative extruder</p> <p>M83</p> <p>; prime nozzle</p> <p>G1 E-5 F4500</p> <p>G1 E5 F4500</p> <p>G1 E5 F4500</p> <p>; absolute E</p> <p>M82</p> <p>; absolute XYZ</p> <p>G90</p> <p>; reset E</p> <p>G92 E{{ pause_position.e }}</p> <p>; move back to pause position XYZ</p> <p>G1 X{{ pause_position.x }} Y{{ pause_position.y }} Z{{ pause_position.z }} F4500</p> <p>; reset to feed rate before pause if available</p> <p>{% if pause_position.f is not none %}G1 F{{ pause_position.f }}{% endif %}</p> <p>{% endif %}</p> <p>You configure these settings in the GCODE Scripts section of the Octoprint settings.</p> <p>It all works like a charm as can be seen from the example picture where I switch from black to grey filament. Seamless.</p> <h3>Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Creality</p> <p class="detail-setting printer"><strong>Printer: </strong> <div><p>Ender 3 Pro</p></div> <p><strong>Rafts:</strong></p> <p>No</p> <p class="detail-setting supports"><strong>Supports: </strong> <div><p>Doesn't Matter</p></div> <p><strong>Resolution:</strong></p> <p>0.2</p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>25%</p></div> <p><strong>Filament:</strong> eSun PLA+ Black</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>I did not us supports, but if you do, make sure to use only from build plate.<br/> Nozzle Temp: 210 Celsius <p>Bed Temp: 55 Celsius</p> <h3>How I Designed This</h3> <p>The holder for the switch is a remix. I added the bracket in order to attach the sensor to the upper frame, straight underneath the filament spool.</p> </p></div></p></p></p> Category: 3D Printing