B-Struder - E3D Hobb-goblin edition

prusaprinters

<p>So I came across the original B-Struder while searching for extruders. I like the design, but as I had some E3D Hobb-goblin drive gears, decided to remix the design to support those.</p> <p>Changes to original:</p> <ul> <li>basically the arm was re-designed from scratch in OpenSCAD to match Hobb-goblin gear</li> <li>the arm's filament path needs to be drilled open. See post-printing</li> <li>other parts (MR105zz_support, lock lever) extended in height as needed</li> <li>extended and added some bolt holes to the motor mount as I needed those for my own use (4mm hole, 29mm distance)</li> <li>lock lever has other 'arm' which should help operating it. I actually cannot use it due to space constraints (was a good idea but didn't check clearances...)</li> <li>added a spacer which can be used if one has MR105zz_support and lock lever from original thing</li> <li>added new spring cap for 8mm spring</li> </ul> <p>Most of the original instructions and part list apply. You will need a bit longer than 25mm M3 bolts for this. Also I'm not using the printed washers but those should fit fine.</p> <p>Source code: <a href="https://github.com/spegelius/3DModels/blob/master/B-struder_remix/b-struder_remix.scad">https://github.com/spegelius/3DModels/blob/master/B-struder_remix/b-struder_remix.scad</a></p> <h3>Print Settings</h3> <p><strong>Printer:</strong></p> <p>FrankedCube</p> <p class="detail-setting rafts"><strong>Rafts: </strong> <div><p>No</p></div> <p><strong>Supports:</strong></p> <p>Yes</p> <p class="detail-setting resolution"><strong>Resolution: </strong> <div><p>0.2mm</p></div> <p><strong>Infill:</strong></p> <p>50%</p> <p><strong>Filament:</strong></p> Esun? ABS <p>Any</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>For the arm. 4perimeters and 50% infill. I used supports, but should work without those too if your printer and material like bridging.</p> The motor mount should be solid. Other parts 2-3 perimeters, 20+% infill. <h3>Post-Printing</h3> <p>After printing the arm, you need to drill out the filament path with 2mm drill bit. This is by design as I tried to maximize continuous perimeters around the filament path and drive gear hole.</p> <p>When printing, be careful to print straight! There's a small hole that should guide the drill bit, but the drill bit can still wander if not careful.</p> <p>The M6 push fittings should be possible to just screw them in. I haven't printed the arm without supports so don't know how well the threads work if printed without supports</p> </div></p></p> Category: 3D Printer Extruders