MNFG604: Computer Aided Design Assignment 2

Assignment 2

Assessment

• Reverse engineering exercise: carefully select an existing product with appropriate complexity and re-create it as a PTC Creo Parametric assembly.
  • Electrical circuit with battery or mains power 
  • Physical features and moving parts 
• Assignment brief and marking criteria sheet are available on Canvas.
• 70% of the final module mark.

Part I - CAD

• Existing product
• Must contain some form of electrical circuit (battery or mains power) 
• Level of complexity of your chosen product will influence the final mark 
• Active Learning Laboratory available to take apart and measure your components. 
• CAD should be as detailed as possible, fully assembled with moving parts. 
• CAD parts should be textured appropriately

Part II - Report

Report structure:

• Summary (200 words) 
• Table of Contents 
• Introduction (500 words) 
• Reverse Engineering (1500 words) 
• Bill of Materials 
• 2D Technical Drawings 
• References

Assessment Requirements Brief Summary

Assignment 2: Reverse Engineering Exercise assesses students’ ability to analyze an existing product and recreate it as a PTC Creo Parametric assembly, supported by a comprehensive technical report. The assignment contributes 70% of the final module mark and is divided into two parts.

Academic Mentor’s Step-by-Step Approach

The academic mentor guided the student through a systematic and structured process to ensure full alignment with the marking criteria.

Step 1: Understanding the Brief and Marking Criteria

The mentor first explained the assessment objectives, weighting, and expectations for both the CAD and report components. Special emphasis was placed on product complexity, accuracy, and documentation quality.

Step 2: Product Selection

The student was guided to select a product that:

• Included an electrical circuit
• Had sufficient mechanical and moving components
• Was complex enough to score well but realistic to model within time constraints

The mentor ensured the product was suitable for both CAD recreation and report analysis.

Step 3: Reverse Engineering and Measurement

Using the Active Learning Laboratory, the student was guided on:

• Safely disassembling the product
• Measuring components accurately
• Identifying electrical and mechanical relationships

This stage helped translate real-world components into accurate CAD dimensions.

Step 4: CAD Modelling in PTC Creo

The mentor supported the student in:

• Creating individual parts with correct constraints
• Assembling components with functional moving mechanisms
• Applying realistic textures and materials
• Ensuring the final assembly reflected real-world functionality

The focus remained on precision, realism, and completeness.

Step 5: Report Writing Guidance

Each report section was addressed individually:

• Summary: Concise overview of the project scope and outcomes
• Introduction: Context of reverse engineering and product choice
• Reverse Engineering Section: Detailed explanation of disassembly, modelling decisions, challenges, and solutions
• Bill of Materials: Clear listing of components, materials, and quantities
• 2D Technical Drawings: Properly dimensioned drawings extracted from CAD
• References: Correct academic and technical citations

The mentor ensured logical flow and adherence to word limits.

Step 6: Review and Refinement

The complete CAD model and report were reviewed to ensure:

• Alignment with marking criteria
• Technical accuracy
• Clear presentation and professional formatting

Feedback was incorporated to strengthen weak areas before final submission.

Final Outcome and Learning Objectives Achieved

Outcome Achieved

• A fully assembled PTC Creo CAD model with moving parts and electrical considerations
• A well-structured technical report meeting all word limits and documentation requirements
• Clear demonstration of reverse engineering principles

Learning Objectives Covered

• Practical application of reverse engineering techniques
• Advanced CAD modelling and assembly skills
• Understanding of electrical and mechanical system integration
• Technical measurement and documentation skills
• Professional engineering report writing
• Critical analysis and problem-solving

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