parametric frame for glasses starting from lens STL

prusaprinters

<p>Starting from an STL model of the left lens, build a parametric frame for your glasses. Using a hinge design by u:<a href="/ericsko/designs">erickso</a> that I further reinforced, as well as his temple design (from <a href="https://www.thingiverse.com/thing:2798109">this thing</a>).</p><p><strong>* * * Rev.1: adding taper to lens cutout making supports unncecessary!</strong></p><p>To use:</p><ul><li>Download the SCAD file as well as HINGE.STL.</li><li>Trace the contour of your right lens onto the back of an engineering paper sheet, making sure it sits in the correct angular orientation relative to the paper grid.</li><li>Scan the sheet using a geometrically accurate scanner (for example the ScannerPro app on iPhone making sure geometry correction is enabled.).</li><li>Follow <a href="https://www.youtube.com/watch?v=3caDRzc87_Y">this youtube guide</a> to import the scanned image into FreeCAD and trace the contour of the lens.</li><li>Pad the drawing by the thickness of the lens, then export the body as LEFTLENS.STL in teh same dir as the OpenSCAD script.</li><li>Measure the width and height of the lens drawing (in MM).<img class="image-style-align-right image_resized" style="width:27.76%;" src="https://media.printables.com/media/prints/264261/rich_content/8346ef21-fda6-4dc0-8ced-1e529b8cdd6a/screen-shot-2022-08-22-at-102745-pm.png#%7B%22uuid%22%3A%22624b1cc7-a28e-4c53-84e9-d247e0e835b2%22%2C%22w%22%3A473%2C%22h%22%3A656%7D"></li><li>Open the SCAD script, enter the lens width, height, and thickness, and adjust the other parameters to the right &nbsp;until the design looks something like this<img class="image_resized" style="width:43.17%;" src="https://media.printables.com/media/prints/264261/rich_content/3db6b62a-5d4a-44b1-b690-21c13cf15c72/screen-shot-2022-08-22-at-102115-pm.png#%7B%22uuid%22%3A%22b13e80a4-a358-4b6e-a217-2a5d491b0323%22%2C%22w%22%3A824%2C%22h%22%3A532%7D"></li><li>Generate the geometry and export as STL.</li><li>Download u:<a href="/ericsko/designs">erickso</a>'s temples <a href="https://www.thingiverse.com/eb1dc32c-423e-4464-834f-f0de0d31eaf3">Glasses_temple-Left_part.STL</a> and <a href="https://www.thingiverse.com/4b383f01-9e1c-4c51-8dbb-53e5412a3a58">Glasses_temple-Right_part.STL</a>.</li><li>Print your new FRAMES.STL as well as the temples.</li><li>Push some PLA filament through the hinge holes and trim it to length.</li></ul><p>The lenses snap into the frame. The tolerances can be adjusted in the SCAD parameters but the defaults should produce a snug fit, something like this: <img src="https://media.printables.com/media/prints/264261/rich_content/ab4321ed-9f36-4e24-b2e5-0f5c2dc3adc9/img_4245jpg_bw.jpeg#%7B%22uuid%22%3A%2277feb891-eca3-4604-8891-651bb4cb468b%22%2C%22w%22%3A1024%2C%22h%22%3A768%7D"></p><figure class="image"><img src="https://media.printables.com/media/prints/264261/rich_content/b76f2639-ea74-4406-a377-2828bd84292e/img_4247_bw.jpg#%7B%22uuid%22%3A%221c41ba13-f4c8-44e0-a69b-de6d83cef602%22%2C%22w%22%3A1200%2C%22h%22%3A900%7D"></figure><p>Category: Glasses</p>