Customizable Knob for CPAP

prusaprinters

<p>This is a customizable knob to fit a D-shaft (shaft with flat) for a control that rotates and has push-on, push-off.</p> <p>The housing it fits into has flats and ridges that interfere with pushing, and with the diameter of the print that holds the metal shaft.</p> <p>I measured with digital calipers and wrote the openSCAD to model the broken knob, but better - stronger.</p> <p>After an initial print that didn't fit, I added an option to the customizer to just print a test shaft so I could iterate on getting the dimensions right.</p> <p>For the final print, I told the slicer to use concentric circles for the bottom layer - that's what you see in the finished print, in place on the CPAP.</p> <p>In the slicer, I used a modifier to make the inner shaft use 4 vertical shells. That made it print solid, for extra strength.</p> <h3>Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Prusa</p> <p class="detail-setting printer"><strong>Printer: </strong> <div><p>i3 MK3</p></div> <p><strong>Rafts:</strong></p> <p>No</p> <p class="detail-setting supports"><strong>Supports: </strong> <div><p>No</p></div> <p><strong>Resolution:</strong></p> <p>0.3mm. Standard 0.4mm nozzle</p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>15%</p></div> <p><strong>Filament:</strong> AMazon Basic PLA Black</p> </p></p></p> Category: Parts