Rubber Band Filament Cutter 45°

prusaprinters

<p>I love the Filament Cutter 45 from Pomi, but as i try to print it, i found that the needed materials are not as common available as i thought. So i decided to give it a “facelift” with a even easier accessible material: rubber band.</p><h3><strong>Print</strong></h3><ul><li>No supports needed.<br>Print as the STL is exported to get optimal results.</li><li>Tested with PETG and PLA.</li></ul><h3>Material</h3><ul><li>One segment from snap-off blade 18 mm (<a href="https://www.amazon.com/Stanley-11-301-Quick-Point-Snap-Off-Blades/dp/B000BQY64Y">example</a> 1, <a href="https://www.heureka.cz/?h%5Bfraze%5D=%C4%8Depel+18mm+odlamovac%C3%AD+n%C3%A1hradn%C3%AD+-+10ks&amp;m=f">example</a> 2)</li></ul><figure class="image image-style-align-center image_resized" style="width:347.281px;"><img src="https://media.prusaprinters.org/media/prints/67509/rich_content/621f4363-d438-41aa-805a-17a50d551125/obrazek.png"></figure><ul><li>a rubber band</li><li>maybe some glue</li></ul><h3>Improvements over Pomi`s design</h3><ul><li>no ball springs or screws needed</li><li>minimized friction: print bottom part sideways, so the layers of top and bottom part do not rub against each other</li><li>clearer symbol how to attache the blade</li></ul><h3>How to assemble?</h3><ul><li>Print as the stl files are provided (top part should be upside down, bottom part should lay sideways).</li><li>Take one piece of the snap-off blade and put it into top part. Use some pliers to avoid an injury. There is a small mark on the side of the top part how where the tip of the blade should be. Additionally you can use glue to fix the blade in position.<br>If the slot is too narrow (can happen depending on print settings) a hair dryer can be used to soften the plastic a bit.</li><li>Put top and bottom part on each other. Check that the blade holds well on the upper side while both parts are at there nearest position.</li><li>Cut to pieces of 1.75mm filament approximately 3 cm in length. Add these pieces on the small holes on the side of the bottom part. Cut the overhang of the filament. You may glue these if they are to loose.</li><li>Place the rubber band.</li></ul><h3>Customize the angle of the cutter</h3><p>You may customize the angle of the cutter in FreeCAD (i used FreeCAD 0.20).</p><ul><li>Got to <strong>Part Design Workbench</strong></li><li>Click on <strong>Top Part &gt; DatumPlane blade</strong><br>In the <i>Properties &gt; Attachment &gt; Angle</i> change the 45° angle as you like</li><li>Click on <strong>Bottom Part &gt; Datum Plane Blade Cutout</strong><br>In the <i>Properties &gt; Attachment &gt; Angle</i> change the 45° angle as you like</li><li>Check the angle in Wireframe-View (Menu &gt; View &gt; Draw Style &gt; Wireframe)</li></ul>