Learning Targets
- Create or revise CAD components needed for the prototype.
- Check fit, clearance, and movement between modeled parts.
- Record CAD evidence before physical construction.
IED Unit 4 • Lesson 4.14
CAD Modeling Workday: Components, Motion, and Fit
Focus question: How do engineers model and check parts before building?
Mission Briefing
Today’s Plan
Use this page with the lesson presentation, your engineering notebook, and the tools or evidence assigned for Model and Check Prototype Components.
Success Looks Like
You can model prototype components and record evidence that parts fit and move as intended.
LaunchLearnApplyCheckSubmit
Opening Prompt
How do engineers model and check parts before building?
Connect your response to the decision, evidence, or quality standard required for Model and Check Prototype Components.
Reveal: useful engineering move
This lesson is ready to move forward when the evidence meets this standard: The modeled components fit the approved layout and can be fabricated with available tools and materials.
Core Skill
What We Are Practicing
CAD models should be checked against the function they must support.
Fit and motion issues are easier to fix before fabrication.
Model screenshots and notes help explain why parts are ready or need revision.
Your Task
Model and Check Prototype Components
Develop the required CAD components and evaluate fit, motion space, and manufacturability before construction.
- Model the assigned components from the approved layout.
- Use parameters or dimensions to control critical geometry.
- Assemble or position the parts for a fit check.
- Revise any interference or impractical feature.
Quality check: The modeled components fit the approved layout and can be fabricated with available tools and materials.
Lesson Interactive
Verify CAD Components, Fit, and Motion
Use model parameters to check whether the assembly is ready for prototyping.
Clearance:
Travel:
Model status: Revise model
Target: 0.30 mm clearance and 70° travel.
A usable motion model needs separate components, realistic fit clearance, and a defined motion limit.
What You Will Submit
Prototype CAD Check
Submission standard: The modeled components fit the approved layout and can be fabricated with available tools and materials.
Resources
Lesson Resources
Lesson 4.14 PowerPoint
Use the lesson slides for guided practice, interactive checks, and the exit ticket.
Introduction to Engineering Design
Return to the IED course hub for units, resources, certifications, and current course information.