42 - Version41

prusaprinters

<p>The Answer.</p> <p>Also, just having fun trying out a some 3D CAD and printing ideas. More versions on the way.</p> <p>This one : 42 Zoetrope</p> <p>How does it work? :</p> <p>This print uses persistence of vision to display a "42" when you turn the crank to bring all the segments together. Unfortunately I did not get a photo of the effect - just more trouble than it was worth. In any case - turn the crank quickly in either direction while looking at the panel and the segments will "combine."</p> <p>This is the simplest type of zoetrope there is - some might even say it is not a true zoetrope. However, in this case simple is what I was going for (relatively speaking - as this print has 13 parts!). I wanted to try making a simple geared mechanism before I tried my hand at something with more complex gearing.</p> <p>OnShape 3D CAD files :</p> <p><a href="https://cad.onshape.com/documents/23ed5c9f4b9cef7172e69b17/w/aeec17dea8e6ae92e53ec58d/e/a5767f488dd95b8b3669d641">https://cad.onshape.com/documents/23ed5c9f4b9cef7172e69b17/w/aeec17dea8e6ae92e53ec58d/e/a5767f488dd95b8b3669d641</a></p> <h3>Print instructions</h3><p>Print the parts in PLA using the 3mf files provided. The "sheets" (which all print together) must be printed in two colors using filament switching; I found that a light color on a dark background works best - in my case white on black.</p> <p>Probably many of the parts can be printed together if you want to reduce the number of print jobs.</p> <p>Assemble the parts as shown in the photos. The sheets fit into grooves in the axle - this is most easily done by inserting the sheets into the end that prints on top. Suggested assembly order :</p> <ul> <li>Insert sheets into axle</li> <li>Insert axle though middle frame into small gear (can be reversed if you are left handed)</li> <li>Insert crank axle into large gear (align the "bumps" on the axle with the grooves in the gear bore</li> <li>Insert the crank axle (smooth end) into the middle frame</li> <li>Add the crank braces (small rectangular pieces) to the middle frame</li> <li>Add the crank-end frame</li> <li>Add the crank handle</li> <li>Add the 3rd frame</li> <li>Position the frames in the base pieces - note there is a left and right base; the angled side should face out</li> </ul> <p>Finally, position the sheets in the middle of the axle and make sure they are all spaced the same. I found they have a tendency to slide in the grooves when spun, so I added a single drop of superglue to the back of each sheet where it meets the slot.</p>