I can build a stable VEX mechanism using proper spacing, fastening, shaft support, alignment, and safety habits.
POE Unit 1 • Lesson 1.7
VEX Build Skills and Mechanism Construction
Focus question: What build habits make a VEX mechanism stable, aligned, and test-ready?
Mission Briefing
Today’s Plan
A focused lesson sequence that builds toward the VEX Rover Mechanisms Challenge.
Opening promptConcept voteAerospace linkCompare optionsEvidence challengeQuick checkExit ticket
Lesson Targets
What You Will Be Able to Do
VEX mechanism build-quality checklist
The mechanism is square, shafts are supported, collars and spacers are placed correctly, and moving parts rotate freely.
Activity Flow
How the Lesson Moves
This page highlights the lesson elements you need for practice, evidence, and submission.
1. Inspect the structure
Check squareness, fastener engagement, frame spacing, and rigid connections.
2. Inspect rotating parts
Check shaft support, collars, spacers, gear alignment, and rubbing.
3. Run a hand-powered test
Rotate the mechanism slowly before adding a motor or load.
Lesson Interactive
Audit a VEX Gearbox Before Power
Select every condition that should be corrected before the motor is connected.
Inspection Scenario
- A 180 mm shaft is supported by only one bearing.
- One shaft collar can slide along the shaft.
- The gear faces are offset and contact only at their edges.
- An extra spacer is stored in the team parts tray.
A safe hand test should show smooth rotation without rubbing, wobble, or loose components.
Select Build Issues
Choose conditions that affect support, alignment, fastening, or motion quality.
Today’s Work
Main Deliverable
VEX Mechanism Build-Quality Checklist
Inspect a VEX mechanism and document the corrections needed before powered testing.
- Record at least three inspection findings with exact locations.
- Photograph or sketch the corrected mechanism after alignment and free-motion checks.
Exit Ticket
Mission Debrief
One way today’s lesson connects to an aerospace mechanism or VEX rover system.
One type of evidence you could use to support a design decision.
One question you still have about mechanisms, energy, power, or the Unit 1 challenge.
Resources
Lesson Resources
Principles of Engineering
Return to the POE course hub for units, resources, certifications, and current course information.
VEX Rover Mechanisms Challenge
Use this unit project context when connecting the lesson to mechanism planning, testing, and design review evidence.