Analyze how the controller, sensors, robotic arm, conveyors, pneumatic actuators, safety devices, and operator work together as one automated manufacturing system.
Work toward the lesson goal: Anatomy of an Automated Workcell. Use the directions and success criteria in the activity below.
Materials
For the online work: a browser and your engineering notebook. Follow the activity’s materials list for any physical build, and get teacher approval before using equipment.
Plan your time
Suggested work block: 45–60 minutes. Physical builds and projects may span several classes; follow your teacher’s schedule.
Learning Targets
By the end of this lesson
Identify the major mechanical, electrical, sensing, control, material-handling, and safety subsystems of the VEX CTE Workcell.
Explain the role of the EXP Brain as the controller for the workcell.
Classify workcell components as inputs, processing/control, or outputs.
Trace both material flow and information flow through an automated production process.
Explain how sensor feedback can change system behavior.
Analyze how a subsystem failure can affect the overall manufacturing process.
Lesson Purpose
Think in systems
Unit 1 focused on programming and robotic movement. Unit 2 begins by stepping back and examining how individual devices become a complete automated system.
The goal is not to learn another movement program. Your goal is to understand what each subsystem does, what information it uses, and how its behavior affects the rest of the workcell.
Core Model
Input → Control → Output → Feedback
Automated systems follow a repeatable information pattern. A sensor or operator provides an input. The controller processes that information using the program. The controller commands an output such as a motor, robotic arm, signal tower, or pneumatic actuator. Additional sensing can then provide feedback to verify what actually happened.
Example: Product Detection
Object Sensor → EXP Brain → Conveyor Motor → Product Moves → Sensor verifies the next condition
Example: Product Sorting
Optical Sensor → EXP Brain → program decision → Diverter / conveyor action → product reaches the selected route
Workcell Anatomy
Major Components and Their Roles
Component / System
Primary Role
System Classification
EXP Brain
Receives information, runs the program, and commands connected devices.
Controller / Processing
6-Axis Arm
Manipulates and transfers products.
Output / Actuator
Entry Conveyor
Introduces products into the manufacturing process.
Output / Material Handling
Transport Conveyor
Moves products between workcell operations.
Output / Material Handling
Exit Conveyor
Moves completed or routed products out of the process.
Output / Material Handling
Optical Sensor
Measures product color information.
Input / Sensor
Object Sensor
Detects whether a product is present.
Input / Sensor
Distance Sensor
Measures position or distance to an object.
Input / Sensor
AI Vision Sensor
Identifies and locates products using visual information.
Input / Sensor
Pneumatic Cylinders
Create linear motion for loading and routing operations.
Output / Actuator
Solenoids
Control airflow to pneumatic cylinders.
Output / Control Device
Disk Loader
Feeds products into the process.
Material Handling
Diverters
Route products to different paths.
Output / Material Handling
Signal Tower
Communicates workcell status to an operator.
Output / Human Interface
Emergency Stop / Operator Controls
Allow human intervention when operation must stop or change state.
Safety / Human Interface
Operator
Loads, monitors, verifies, and safely interacts with the automated system.
Human System Element
Material Flow
Where the product moves
Material flow describes the physical path followed by the product. Your system map should show where a part enters the workcell, what equipment moves or manipulates it, and where it leaves or reaches its final destination.
Information Flow
Where the data moves
Information flow describes how sensor readings, program decisions, controller commands, and operator feedback move through the system. A product can remain stationary while information about that product moves through the controller.
Student Workflow
Two-Day Activity
Day 1
Understand the Workcell
Complete the bellwork: What makes a group of machines a system rather than just separate machines?
Participate in the workcell tour and identify the major mechanical, sensing, control, material-handling, safety, and human-interface components.
Classify each major component as an input, controller/processing element, output/actuator, material-handling device, or safety/human interface.
Begin your labeled Workcell System Map.
Before leaving, identify one complete Input → Control → Output example from the workcell.
Day 2
Analyze the System
Review the Input → Control → Output → Feedback model.
Complete the Workcell System Map and show both material flow and information flow.
Complete the Input–Control–Output–Feedback table for at least four workcell operations.
Analyze three possible component or subsystem failures.
Review your work for technical accuracy and submit the completed systems analysis.
Required Analysis
Input–Control–Output–Feedback Table
Analyze at least four operations in your workcell. Each row must explain how information causes a physical or communication response.
System / Operation
Input
Controller Decision
Output
Feedback / Verification
Product Detection
Object Sensor
Object is present
Conveyor stops or changes state
Sensor confirms product remains in position
Color Sorting
Optical Sensor
Determine detected product color
Routing behavior is selected
Product reaches the intended route
Robotic Transfer
Program or sensor state
Transfer is permitted
6-Axis Arm moves product
Next sensor or position confirms arrival
Pneumatic Routing
Sensor / program condition
Select product path
Pneumatic cylinder extends or retracts
Product exits through the correct path
Failure Analysis
What happens when one part of the system fails?
Select three different components or subsystems. For each one, analyze the chain of effects using the structure below.
Component
Possible Failure
Effect on Production
How It Could Be Detected
Appropriate System Response
Example: Object Sensor
Fails to detect a product
Conveyor may continue when the product should stop
Expected sensor state never occurs
Stop the process and alert the operator
Failure 1
Complete in your analysis
Failure 2
Complete in your analysis
Failure 3
Complete in your analysis
Programming Focus
No new programming structure is introduced
Variables, loops, conditionals, functions, and robotic movement from Unit 1 are prerequisite skills. In this lesson, programming is discussed only as the logic used by the controller to connect inputs to outputs. You are not required to submit a new program for Activity 2.1.1.
Primary Deliverable
Automated Workcell Systems Analysis
Workcell System Map: label the major components and classify controller, inputs, outputs/actuators, material-handling equipment, and safety/operator zones.
Input–Control–Output–Feedback Table: analyze at least four workcell operations.
Material & Information Flow: trace one product through the workcell and show both physical movement and information movement.
Failure Analysis: analyze three component or subsystem failures, their effects, detection methods, and appropriate responses.
Grading
10-Point Rubric
Criterion
Points
Workcell System Map — accurate labels and subsystem classifications
3
Input–Control–Output–Feedback Analysis — four complete and accurate system examples
3
Material & Information Flow — clear and technically accurate process tracing
2
Failure Analysis — three realistic failures with effects, detection, and response
Check calculations, units, labels, and measurements against the activity requirements.
Record what actually happened, including unexpected results.
Explain what you changed and why; attach required drawings, photos, CAD, or code in your classroom assignment.
Submit the evidence specified in the activity and your classroom assignment. The report below collects your notes, calculations, observations, and reflections; attach any required drawings, photos, CAD, or code separately.
A PDF download is not a submission. Review it, then upload it and any required attachments through your classroom assignment system.
