Skip to content

Two Disk Wobbler

?
Creation's quality: 0.0/5 (0 votes)
Evaluation of members on the printability, utility, level of detail, etc.
  • 890 views
  • 19 downloads

3D model description

wo Disk Wobbler is a simple two piece toy that utilizes mathematics in its design to roll as well as it does. The first photo shows two of the 4mm thick version, the second shows a single 2mm thick version. I've uploaded "Disk 4mm.stl", the 4mm thick version, which works better on slick surfaces than the original 2mm thick version.

Video of prototype 4mm version is here: https://www.youtube.com/watch?v=fZwH5u_1NmU.

Two Disk Wobbler rolls good because its center of mass remains reasonably constant while rolling, thanks to the length of the slots in the disks used for attachment . The math involved in determining the length of the slots is not overly complicated, (there are a number of equations to solve for the center of mass, the equation I used involves triangles) and is simplified as:

    Slot Length = Disk Radius * (1 - (1 / sqrt(2))), which is approximated by:

    Slot Length = Disk Radius * (.2928932).

I've seen a number of these made of wood over the years; most recently here: https://www.youtube.com/watch?v=k0NloZfdnHE. Another video describing yet another equation for calculating the slot lengths is here: https://www.youtube.com/watch?v=OEMA6jhi5Qo.

If possible, select a slight declining surface to extend the roll time.

3D printing settings

Printer Brand:

Ultimaker

Printer:

Ultimaker 2

Rafts:

No

Supports:

No

Resolution:

.1

Infill:

20%

Post-Printing
Print two disks in the color(s) of your choice then slide them together as shown in "Assembly.skp" or "Assembly.stl", making sure the disks are completely slid together.

  • 3D file format: STL and ZIP
  • Publication date: 2018/06/07 at 17:46

Tags

Creator

Designs 250
Downloads 19.4k
Followers 248

The more mistakes I make, the more knowledge I gain.

License

CC BY


Best sellers of the category Various


Add a comment


Would you like to support Cults?

You like Cults and you want to help us continue the adventure independently? Please note that we are a small team of 3 people, therefore it is very simple to support us to maintain the activity and create future developments. Here are 4 solutions accessible to all:

  • ADVERTISING: Disable your AdBlock banner blocker and click on our banner ads.

  • AFFILIATION: Make your purchases online by clicking on our affiliate links here Amazon, Gearbest or Aliexpress.

  • DONATE: If you want, you can make a donation via PayPal here.

  • WORD OF MOUTH: Invite your friends to come, discover the platform and the magnificent 3D files shared by the community!