(Improved) "Dream-catcher" flying extruder

prusaprinters

<p>Uploaded a new straight extruder holder, as the tilted one worked, but had a tendency to eat the pneumatic fittings.</p> <p>The new extruder holder is also a bit longer, and centered on the bed, allowing a very short bowden-tube, with a free length between pneumatic connectors of 4.5mm.</p> <p>After some testing, my retractions are down to 0.7mm, 99mm/s retraction speed, and K-factor 0.17.</p> <p>Easy to print flying extruder mod to FLSun QQ-S Pro.</p> <p>Print 3 pulleys and bearing-holders</p> <p>Use 3x: M4 bolts and nuts to mount extruder holder to Dream-catcher.</p> <p>Use 3x: 608 bearings for pulleys</p> <p>Use 3x M4x20 bolts or screws for bearing-holders</p> <p>Use 3x: rubber bands + 4 to mount to the counterweight string. One rubberband on each bollard, but 2 on the third to offset the weight of the extruder-motor.</p> <p>Use 3x: pieces of string fixed to carriages.</p> <p>Tie one rubber band to each piece of string. Tight enough to allow one revolution around pulley when fixed to the center bollard on the dream-catcher.</p> <p>The other three bollards are for mounting a counterweight-system:</p> <p><a href="https://www.thingiverse.com/thing:4888073/files">https://www.thingiverse.com/thing:4888073/files</a></p> <p>M4 bolts will be self-tapping</p> <p>PS: The carriages I use are these: <a href="https://www.thingiverse.com/thing:4669014">https://www.thingiverse.com/thing:4669014</a></p> <p>But it is pretty easy to make a figure-8 of string around the screws holding the arms on the original carriage.</p> <h3>Print Settings</h3> <p><strong>Printer:</strong></p> <p>QQ-S Pro</p> <p class="detail-setting resolution"><strong>Resolution: </strong> <div><p>0.2</p></div> <p><strong>Infill:</strong></p> <p>20</p> <p><strong>Filament:</strong></p> Generic PLA </p> Category: 3D Printer Accessories