Chapter 3

Methodology

The process for designing, developing, and testing the contour gauge for bamboo joinery.

Project Flowchart

Process diagram: From problem identification to data collection

Identified the limitations of existing contour gauge designs — excessive bulk, lack of ergonomics, and impracticality for fieldwork.

Brainstormed solutions focusing on reduced dimensions, modular features, and optimized geometry for portability.

Created digital models using CAD software. Evaluated design concepts for manufacturability and functionality.

Iterative evaluation of prototypes. Adjustments made using AutoCAD based on feedback and testing results.

Selected PETG for structural components and TPU 90A for the centering mechanism based on strength, flexibility, and printability.

Components printed using PETG filament. Prototypes assembled and tested for fit and function.

Assembled printed parts including iris mechanism, tube sliders, centering ring, and ohm-shaped stand.

Tested the gauge on different bamboo sizes (∅7, ∅8, ∅9, ∅10 cm). Collected data on accuracy, usability, and portability.