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Picture of Mechanic Doll's Motorized Skirt

First, would you excuse me if I make some gramatical mistakes, I'm not a native english speaker. I've done my best.

You will need :

  • 20 inches BMX metal rim in good condition
  • 2 gear motors
  • 2 M6x15mm hexagonal female thread spacer + M6x15mm screws
  • 6 3D printed pieces "rim.stl"
  • 2 3D printed pieces "motor.stl"
  • 2 GT2 20 teeth 5mm pulley
  • 125cm GT2 belt
  • 6 M3x6mm screws
  • 28 M3x20mm flat head screws + nuts
  • 12 M3 washers
  • 6 M3x15mm (classic screws)
  • Electric wire
  • 2 battery connectors ( here a JST and a XT6 were used)
  • 12V battery (here a 3S 2200mAh LiPo were used)
  • A ON/OFF switch
  • 1m boning
  • 1m bias
  • 4 metal press studs
  • 1x0,3m solid fabric or fabric+interfacing (waistband)
  • Zip or hooks
  • 1m fabric (waistband cover)
  • 2,5m piping (optional)
  • 1,3m solid ribbon
  • 1,5m lightweight fabric (skirt)
  • 1m lightweight cotton fabric (underskirt upper part)
  • 2x1m tulle (underskirt lower part)
  • Approx. 2x18x0,15m tulle (petticoat, lower part)
  • Approx. 18x0,2m tulle or satin (petticoat upper part)

And some tools such as :

  • Angle grinder
  • Drill
  • File
  • Screwdriver
  • Neoprene glue
  • Silicone spray
  • Sandpaper
  • A sewing machine

Step 1: Prepare the Rim

Picture of Prepare the Rim
2-Découpe.jpg
3-Positionnement.jpg
4-Taraudage.jpg
5-Perçage ecartement.jpg
6-Pose courroie.jpg

RECAP, you will need :

  • 20 inches BMX metal rim in good condition
  • 125cm GT2 belt
  • 28 M3x20mm flat head screws + nuts

For this step you have to cut in half the rim just under the angle (second drawing). Be carefull to cut very straight. Then clean the cut and the outer plane surface of each new part with sandpaper. These plane parts will have to slide one on the other (See the third drawing).

Once you've done with the first tricky step (only two or three, don't worry) you must mill the holes of the spokes on the inside (fourth drawing).

Place the M3x20mm flat head screws + nuts. Screws must not dislodge since then. Clean a little bit with sandpaper.

Then glue the belt nearest from the rounded edge on the same side of the milled holes (fifth drawing). Be carefull to glue it on the plane part and to be VERY VERY REGULAR!

IgorF21 year ago

Good job! :D

You could add a music box synchronized with skirt's rotation. :)

MimieGudule (author)  IgorF21 year ago
(removed by author or community request)
You're welcome. :)
Please let me know if you succeed! :D
MimieGudule (author)  IgorF21 year ago
Oho nice! Very good idea! Thank you very much. I'll try if the motors'noise don't Viber the music.
seamster1 year ago

Very cool project, nicely done! :)

MimieGudule (author)  seamster1 year ago
Thank you very much !