I acquired the following non-3D printed parts:
• One N20 6VDC 50RPM gear motor.
• One 1.5VDC power supply capable of 40ma (a single 1.5VDC battery will work great).
I 3D printed the following parts at .15mm layer height, 20% infill with no supports:
• Carousel, Base.stl
• Carousel, Canopy.3mf
Note the files with the extension ".3mf" are dual extrusion files. If you are unable to print these files on a single extrusion printer, let me know and I will convert them to single extrusion.
Prior to assembly, test fit and trim, file, sand, etc. all parts as necessary for smooth movement of moving surfaces, and tight fit for non moving surfaces. Depending on you printer, your printer settings and the colors you chose, more or less trimming, filing and/or sanding may be required. Carefully file all edges that contacted the build plate to make absolutely certain that all build plate "ooze" is removed and that all edges are smooth. I used small jewelers files and plenty of patience to perform this step.
If you experience difficulties snapping "Carousel, Base.stl" to "Carousel, Canopy.3mf" I recommend using a 3.95mm (5/32") drill bit to clean out the round holes in "Carousel, Canopy.3mf".
Assemble the Base.
To assemble the base, I started by soldering the red and black wires to the motor terminals such that the motor shaft rotated clockwise as viewed from the motor shaft end of the gear motor.
Next, I threaded the motor wires through the top of the "Base.stl" tower and out the side wiring tunnel, then pressed the motor into position such that that top motor plate was flush with the top of the tower.
Assemble the Carousel.
To assemble the carousel, I positioned the five "Horse.3mf" around "Carousel, Base.stl" in the rectangle holes such that each horse faced in the clockwise direction as viewed from the top of the carousel.
Next I loosely positioned "Carousel, Canopy.3mf" over this assembly, carefully rotated the entire assembly upside down, aligned the rectangular horse rods with the rectangular holes in the canopy and the round base rods with the round holes in the canopy, then carefully pressed the assembly together making certain that all horses would easily rise and fall.
For final assembly, I started by rotating the carousel until the motor shaft hole flat aligned with the gear motor shaft flat then pressed the carousel onto the motor shaft until the top surface of the carousel base aligned with the top outer ring of the base. At this point I applied power to make sure there there was no binding (if binding or popping occurs, the carousel is pressed too far onto the base).
Next I pressed the flags into position in the mounting holes of each horse and applied power.
And that is how I 3D printed and assembled "Carousel II".
I hope you enjoyed it!