No-Face Roly-Poly Toy

No-Face Roly-Poly Toy

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A1 mini
A1

0.16mm layer, 2 walls, 3% infill
0.16mm layer, 2 walls, 3% infill
Designer
2.1 h
2 plates

Open in Bambu Studio
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Description

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Please read the red text before printing:
Based on your coin magnification model, it is recommended to set the diameter to coin diameter + 0.2 mm
Using a coin as the weight, the default hole diameter for coin placement is 20.2 mm

And use metals with the highest density possible
 

Copper > Nickel > Iron > Zinc > Aluminum

Roly-poly Toy Principle

A roly-poly toy is a fascinating toy that self-rights regardless of how it is pushed. This phenomenon's underlying physics primarily involves center of gravity and stability:

  1. Center of Gravity Design
    The toy's base incorporates heavier materials, positioning the center of gravity at its lowest point. When tipped, gravity creates a restoring torque, returning it upright.
  2. Curved Base
    The curved base shifts the contact point upon tilting, lowering the center of gravity and promoting self-righting.
  3. Stable Equilibrium
    Upright, the toy's center of gravity is at its lowest, a state of stable equilibrium. External forces raise this center, but the toy naturally restores itself to the lowest point.

Instructions for Printing

  1. Based on your coin magnification model, it is recommended to set the diameter to coin diameter + 0.2 mm.
  2. For using a coin as the weight, the default hole diameter for coin placement is 20.2 mm.
  3. Whenever possible, use metals with higher density for optimal performance.

Metal Density Recommendation (Descending Order):

  • Copper > Nickel > Iron > Zinc > Aluminum

Roly-poly Toy Principle

A roly-poly toy is an amusing toy that automatically returns to an upright position no matter how it is pushed. The underlying physical principle involves center of gravity and stability:

Center of Gravity Design

The bottom of a roly-poly toy is equipped with heavier materials, ensuring the overall center of gravity is positioned near the lowest point at the base. This design ensures that when the toy is pushed over, gravity generates a restoring torque, which pushes the toy back to its upright position.

Curved Base

The base of the toy is curved. When tilted, the contact point with the ground shifts, causing the center of gravity to move towards a lower position, creating a tendency to restore balance.

Stable Equilibrium

When the roly-poly toy stands upright, its center of gravity is at the lowest possible point, representing a state of stable equilibrium. When disturbed by external forces, the center of gravity rises, but the toy naturally returns to the lowest point.

Bill of Materials

Bambu Filaments
A00-K0-1.75-1000-SPLFREE
× 1
A00-W1-1.75-1000-SPLFREE
× 1
A00-P2-1.75-1000-SPLFREE
× 1
A00-D0-1.75-1000-SPLFREE
× 1
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