Lesson 3: Clawbot Construction
Duration of Days: 15
Lesson Objective
Students will synthesize their knowledge of structure and motion to build a fully functional 4-motor VEX Clawbot, ensuring all mechanical linkages operate smoothly and all electronics are correctly routed.
1. How does the order of assembly impact your ability to reach tight spaces with tools?
2. Why is "symmetry" the most important factor in a robot's ability to drive straight?
3. How do we protect the "veins" (cables) of our robot from being pinched by moving parts?
Sub-assembly, Cable Management, Pivot Point, Gear Backlash, Drive Train, End-Effector, Cantilevered Load.
NGSS MS-ETS1-1: Define the criteria and constraints of a design problem with sufficient precision.
CSTA 2-CS-02: Design projects that combine hardware and software components.
Description: A multi-week build phase where students construct the three main sub-assemblies (Chassis, Tower/Arm, and Claw) and integrate them into a single robotic system.
Purpose: To develop technical stamina and the ability to follow complex, multi-stage engineering documentation.
DOK Level: 3 (Strategic Thinking/Construction)
In this course, we recognize that students enter the lab with varying levels of technical experience. Our differentiation strategy employs a 'Scaffolded Autonomy' approach. We provide structured, step-by-step guidance for foundational concepts while offering open-ended, 'Design Challenge' extensions for advanced learners. By utilizing peer-mentorship models, diverse instructional media (visual, tactile, and digital), and flexible project pathways, we ensure every student can move from consumer to creator at their own pace.
The 15-Point Inspection: A formal "Technical Inspection" where the teacher checks for:
1. Squared chassis.
2. Friction-free axles.
3. Properly seated cables.
4. Tightened fasteners (no "rattle").