WWVB Mount & Improved Hands for Modular Clock

prusaprinters

<p>Ain't got no time for quartz clocks. Get that WWVB goodness. <a href="https://www.prusaprinters.org/social/55872-boblobs">Boblobs</a>'s <a href="https://www.prusaprinters.org/prints/68427-modular-clock">Modular Clock</a> has a bunch of nice clock faces to choose from and is well thought out - it's just missing space for a better mechanism.</p><h4>Vitamins</h4><p>Remixed for HD-1688 Cheng Bang WWVB radio-controlled clock mechanism available:</p><ul><li><a href="https://www.aliexpress.com/item/32928015438.html">HR9412 on AliExpress for 12$</a></li><li><a href="https://www.amazon.com/Movement-Electric-Controlled-Scanning-Clockwork/dp/B07R8W3YNK/">HR9415+903 on Amazon for 20$</a> (same mechanism)</li></ul><h4>Printing &amp; Assembly</h4><ol><li>Print a frame &amp; face from the original <a href="https://www.prusaprinters.org/prints/68427-modular-clock/files">Modular Clock</a>. Print mount &amp; hands from here.</li><li>I printed all these parts with 0.6 mm nozzle.</li><li>May have to shave down the interior diameter of a tiny bit with an x-acto.</li><li>Have your wife paint the second hand to a color of your choice; I matched Azure Blue from the marks.</li></ol><h4>Mods</h4><ul><li>Clock hands increased size XY by 128% to better cover clock surface. Adjusted hole diameters to 5.13 mm for hour hand and 3.25 mm for minute hand.</li><li>Cut out region inside “clockmount” for larger WWVB Radio mechanism.</li><li>Added ribs to compensate for subtracted region in “clockmount”</li><li>Added fixed wall mount hole for #6 or #8 screw in “clockmount”</li></ul><h4>Notes</h4><p>After getting the time signal is was about 4 seconds slow of true. Compare to my radio-controlled Casio in the photo which was about 3 seconds fast.</p><p>Filament in images:</p><ul><li>Prusament Galaxy Silver PLA for “hands”.</li><li>Prusament Urban Grey PETG for “clockmount”.</li><li>Tecbears Silk Gold PLA+ for “circle frame”.</li><li>Fusion Filament Nuclear Winter White HTPLA+ &amp; Prusament Azure Blue PLA for “marks” clock face.</li></ul><p>This is a good design, but with my silk filament on the frame I can see ghosting from the internal screw mechanism. If I were to redesign the clock face I would omit the screw mechanism and perhaps just use an M3 screw to hold the face in the correct position.</p>