Parametric Keychain - Teacher Template (Extension Project)

Briefing

Students design a personalized keychain using fully parametric OpenSCAD code. This project emphasizes parameter-driven design, customization, and user-centered iteration.

Key Learning: Parametric modularity; customization; design for manufacturing variation.

Real-world Connection: Mass customization is a growing manufacturing trend. Parametric design enables efficient production of personalized products.

Constraints

• Keychain must be fully parametric (text, size, material all variables)
• Design must include at least one test for different parameter values
• Assembly instructions must support varied configurations
• Code must be documented for future customization

Functional Requirements

• All design elements are parametric variables
• Keychain includes personalization (names, initials, dates)
• Multiple variant configurations tested and documented
• Design is reproducible and shareable

Deliverables

• .scad with parametric keychain module
• Variant specification table (3+ configurations)
• Photos of at least 2 printed variants
• Customization guide for future users
• Code documentation and usage examples

Rubric

Category 1: Problem & Solution (0-3)

Keychains print successfully and are functional/customizable.

Category 2: Design & Code Quality (0-3)

Code is fully parametric and well-organized. Variants work well.

Category 3: Documentation (0-3)

Variant table complete. Customization guide clear and detailed.

Assessment Notes

• Strong submissions: Show comprehensive parametric thinking, multiple tested variants, and clear guidance for customization
• Reinforce: Documentation for design reuse
• Extension: User feedback on customization preferences; commercial potential analysis