Stylized bunny pendant with rotating ears and eyes. Goes from a sleepy expression with hidden ears to a happy expression with the ears up and alert. Very simple to assemble but requires a fairly precise print. Feel free to scale it up if your printer has troubles with the finer detailed parts.
I printed it on a Prusa Mk3S at 0.1mm resolution at 20% infill. The infill density doesnt really matter but I wouldnt go too much lower than 20%. I also used the "Elephant Foot Compensation" setting on my slicer with a 0.2mm setting to help prevent the first layer of the gears expanding too much and making clean-up a pain. The gears need to be very accurate at the default scale otherwise the parts will not fit properly and you will have to go in and sand/file down each tooth (ugh...) so I strongly advise shrinking the first layer by at least 0.2mm to make your life easier.
Once printed, only a few dabs of superglue are necessary to connect the parts.
Be sure to print two copies of the Ears, Eyes, and each gear. Consult the screenshot of the print platter for help.
Use Elephant Foot Compensation at 0.2mm
Ensure that all gears mesh freely and sand any connecting surfaces as best you can to create flat mating surfaces.
Place the Rack into the narrow slot on the BunnyEars_Bottom and push it all the way in so that the circular ring is as close to the Bottom part as possible.
Place the two ears on the Bottom part with the Bottom's posts through the ear holes and rotate them so they are in the fully covered position (as in the second photo in the gallery).
Place the each SpurGears_11 through the corresponding posts on the Bottom part on top of each ear with the small circular extrusion facing downwards touching the gears. Ensure that both gears mesh with the rack properly and that both ears are in the fully retracted / covered rotation.
Remove one of the gears and apply a very small amount of superglue to the bottom of it and then put it back on the post, pressing it on to the corresponding ear making sure not to let the glue leak on to the post. Ensure that the ears havent moved and that the gear meshes with the rack. Once dry, do the same for the other gear / ear set. Its helpful to do the glueing while the gears and rack are meshed so that the mirrored parts are in sync. Once all the glue is dry, remove the gear/ears and rack from the Bottom part.
Grab the following parts for assembly: BunnyEarrings_Middle, BunnyEarrings_Top and 2x BunnyEarrings_SpurGear_21. Place the gears with the small cylindrical extrusions through the holes in Top part. Ensure that they can rotate freely. Take the thin Middle part and place it over the Middle part such that the two gears are sandwiched between and then glue the Middle and Top parts together making sure that the gears are still able to rotate freely.
Test your fit by placing the ears/gears back on to the posts on the Bottom part with the rack meshing with the gears such that the rack is almost fully extended while the ears are rotated outwards. Try pulling/pushing the rack such that the ears rotate outwards/inwards. Then, place the Top/Middle assembly from step 5 on to the Bottom/Ears/Rack assembly such that the posts on the Bottom part fit into the small recessions in the Top part. Again, move the rack such that the ears rotate outwards and you should see the smaller SpurGears_21 rotating about 180 degrees as you move the rack. If everything moves nicely, you can glue the Top assembly to the Bottom assembly by putting a small amount of super glue on the tops of the Bottom's posts and the narrow extrusion towards the sharp point of the Bottom. Once dry, test again to ensure smooth motion.
- Finally, glue the two Eye crescents on to the exposed shafts of the SpurGears_21 that should be visible through the holes in the Top part. Glue the nose wherever you like. Congrats! youre done and you can now loop a chain / string through the Rack hole to make a necklace.