Continuous Rotation Pointer

prusaprinters

<p>Stepper-driven pointer with continuous rotation: the steppers are fixed so no cable tangles.</p> <h3> Print Settings</h3> <p><strong>Printer:</strong></p> <p>Mini Kossel</p> <p><p class="detail-setting rafts"><strong>Rafts: </strong> <div><p>No</p></div><strong>Supports:</strong></p> <p>No</p> <p><p class="detail-setting resolution"><strong>Resolution: </strong> <div><p>0.2/0.3</p></div><strong>Infill:</strong></p> <p>any</p> <p><strong>Filament:</strong> Random PLA PLA White <br/> <p class="detail-setting notes"><strong>Notes: </strong> </p><div><p>Should print without additional supports (support in one place is built in)</p> Bearings: Uses 6x 624zz bearings (6mm shaft diameter)</div></p> <p>Belts: Uses 2x 200mm length, 6mm wide GT2 belts</p> <p>Machine Screws: Assorted M3 machine screws &amp; grub screws</p> <p>Shafts: 3x 6mm shafts: ~120mm, ~75mm &amp; 300mm (depending on how long you'd like the pointer). I used 6mm carbon fibre rods that I had laying around.</p> <p>Pulleys: 2x 20t GT2 pulleys, can be metal or printed from <a href="https://www.thingiverse.com/thing:11256">https://www.thingiverse.com/thing:11256</a></p> <p>Bevel Gears: 2x 45 deg 1:1 bevel gears, fixing holes drilled M2.5 and tapped M3 to accept 6mm M3 grub screws. I bought these from RS Components (stock no 521-6058, <a href="https://uk.rs-online.com/web/p/mitre-bevel-gears/5216058/?sra=pstk">https://uk.rs-online.com/web/p/mitre-bevel-gears/5216058/?sra=pstk</a>) - check how much you can buy bevel gears for before you decide to make this, they are not cheap</p> <h3> How I Designed This</h3> <p><strong>Built in OpenSCAD</strong></p> <p>*.scad file is included</p> <p>60 tooth pulleys are adapted from pulleys generated from <a href="https://www.thingiverse.com/thing:11256">https://www.thingiverse.com/thing:11256</a></p> </p></p> Category: Physics &amp; Astronomy