Precision Adjustable Drafting Square (Jig) | Mechanical Design by Md Mamun Mia

# Precision Adjustable Drafting Square Mechanism ## Project Overview This project focuses on the **mechanical design** and **CAD modeling** of a **Custom Adjustable Drafting Square**. This specialized tool (or jig) is engineered for users requiring highly repeatable and precise angle/square adjustments. The core challenge involved creating a mechanism that delivers **smooth sliding motion** while maintaining **rigidity** and zero drift when locked—a perfect demonstration of tight tolerance management and functional component design. ## Mechanism Design & Technical Features This design emphasizes **Design for Manufacturing (DFM)** for a product where precision is paramount. - **Sliding Mechanism:** Features a **[Specific Joint Type, e.g., Dovetail/Slider]** for ultra-smooth movement across the adjustment range. - **Robust Locking System:** Uses a **[Specific Lock Type, e.g., Cam Lock/Knurled Knob]** to firmly secure the adjustable member, guaranteeing measurement repeatability. - **Tolerancing:** All functional components are modeled with strict **GD&T tolerances** suitable for **Injection Molding** or **CNC Machining**. - **Assembly Complexity:** The final model is a complex assembly demonstrating accurate inter-part clearances and stack-up analysis. ## Tools & Deliverables This project showcases expertise in intricate mechanism design and comprehensive documentation. - **Primary CAD Software:** **SolidWorks** or **Fusion 360** - **Visualization:** Photorealistic presentation renders from **KeyShot**. - **Deliverables:** - Detailed, fully constrained **Assembly Model** (native files). - **2D Engineering Drawings** for all custom parts, including critical dimensions and tolerances. - **STEP/IGES** files for rapid integration. This design is a testament to translating complex mechanical requirements into a manufacturable, high-precision tool.