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ADM Unit 4

Aerospace CNC Manufacturing: From Design Requirements to Machined Prototype

Analyze an aerospace component, learn how CNC machine code controls motion, develop CAD and CAM files, manufacture a physical prototype, and inspect the result.

Educational prototype

Application Boundary

This component is an educational manufacturing prototype. It is not approved for installation on a crewed aircraft, operational aircraft, or flight-critical system. Any real aerospace application would require additional engineering analysis, material certification, process control, inspection, documentation, and regulatory approval.

Essential questions

What Will Guide the Unit?

  • How do discrete manufacturing steps combine into a controlled aerospace production system?
  • How can a component be made lighter and easier to machine without losing required function?
  • How does G&M code control a CNC mill?
  • How do CAD, CAM, simulation, post-processing, setup, and inspection work together?
  • What evidence is required before a manufactured component can be accepted?
Learning targets

By the End of the Unit

  • Analyze an aerospace component and its interfaces.
  • Select and justify manufacturing processes.
  • Perform material, tolerance, speed, feed, time, and inspection calculations.
  • Interpret and manually create instructional G&M code.
  • Develop a manufacturable CAD model and technical drawing.
  • Create and verify CAM toolpaths.
  • Complete a supervised CNC setup, dry run, and machining operation.
  • Inspect and defend a physical component using evidence.
Unit production toolchain

Fusion CAM with Two CNC Machine Pathways

All students use Fusion Design and Fusion Manufacture. The controller, post processor, file type, startup, work-zero, spindle, and program-execution procedures must match the machine assigned by the teacher.

Path A — DMC2 Mini

  • Controller: Mach3 configured for the DMC2 Mini
  • Post: teacher-validated copy of Autodesk Mach3Mill
  • Typical output: Mach3-compatible .tap file
  • Verification: Fusion simulation, text review, Mach3 toolpath display, raised-Z or single-block dry run

Path B — FoxAlien CNC

  • Exact machine model must be identified before use
  • Controller and supported file type depend on the model
  • Post processor must be selected and validated for that controller
  • Startup, homing, work zero, spindle, and dry-run steps come from the exact model manual and classroom procedure

Do not use Mach3 instructions, a Mach3 post, or DMC2 setup values on a FoxAlien machine unless the teacher has verified that the assigned model uses that exact workflow.

Student workflow

How Every Unit 4 Lesson Works

Each lesson now separates learning, guided practice, graded production work, and approval checkpoints.

1 • Learn

Build the background

Read or watch the assigned official resource, record key ideas, and complete the short readiness task.

2 • Guided practice

Follow a teacher model

Observe or complete a controlled example before applying the skill to the aerospace component.

3 • Complete

Follow the detailed procedure

Work through the numbered steps in order and preserve every required file, calculation, test, and revision.

4 • Checkpoint

Stop for verification

Do not move into CAD release, CAM, posting, machine setup, or cutting until the listed gate is approved.

Unit pathway

Lesson Sequence

Complete the sequence in order. Required teacher approvals separate design, code, CAM, and physical production stages.

LessonTypeTitleFocusOpen
Aerospace Manufacturing PlanningAnalyze the component, establish requirements, compare processes, and prepare for detailed design.
Activity 4.1.1ActivityAerospace Components as Manufactured SystemsTrace how raw material, machining, inspection, finishing, and documentation combine to produce an aerospace component.Open Lesson
Activity 4.1.2ActivityAerospace Component AnalysisAnalyze the function, interfaces, mass, clearances, likely loads, and manufacturing features of an aerospace mounting component.Open Lesson
Activity 4.1.3ActivityDesign for Aerospace ManufacturabilityRevise a component concept so it can be machined safely with available stock, tooling, workholding, and inspection equipment.Open Lesson
Activity 4.1.4ActivityAerospace Manufacturing CalculationsUse stock, mass, tolerance, cost, spindle-speed, feed-rate, and inspection calculations to support manufacturing decisions.Open Lesson
Project 4.1.5ProjectAerospace Component Requirements ReviewDefine the mission need, interfaces, criteria, constraints, process route, material plan, and inspection strategy for the capstone component.Open Lesson
CNC Control and Machine ProgrammingLearn the machine coordinate system and understand how G&M code controls motion and machine states.
Activity 4.2.1ActivityCNC Mill Anatomy, Safety, and Coordinate SystemsIdentify CNC mill systems, hazards, machine coordinates, work coordinates, program zero, and safe setup practices.Open Lesson
Activity 4.2.2ActivityG&M Code for Aerospace ManufacturingInterpret the structure of a Mach3-compatible CNC program used by the DMC2 Mini and connect each block to machine behavior.Open Lesson
Activity 4.2.3ActivityManual Toolpath ProgrammingConvert a dimensioned two-dimensional aerospace pattern into a manually planned and annotated CNC program.Open Lesson
Project 4.2.4ProjectAerospace Toolpath Coding ChallengeWrite, simulate, revise, and validate manual G&M code for a simplified aerospace mounting plate.Open Lesson
CAD, CAM, and Aerospace Component ProductionCreate, verify, manufacture, inspect, and defend the aerospace component prototype.
Activity 4.3.1ActivityCAD Design of the Aerospace ComponentCreate a fully constrained, machinable CAD model for the UAV payload sensor mounting bracket.Open Lesson
Activity 4.3.2ActivityAerospace Component Technical DrawingCreate an inspection-ready technical drawing with datums, critical dimensions, tolerances, material, and revision information.Open Lesson
Activity 4.3.3ActivityCAM Setup and Machining StrategyCreate a CAM setup, tool list, operation sequence, and approved cutting parameters for the aerospace component.Open Lesson
Activity 4.3.4ActivitySimulation, Post-Processing, and Production ApprovalSimulate all toolpaths, verify the post-processed code, and complete the production-readiness review.Open Lesson
Problem 4.3.5ProblemAerospace Component CNC Manufacturing ChallengeSet up the CNC mill, manufacture the approved component, inspect it, complete a fit test, and defend the manufacturing process.Open Lesson
Culminating problem

UAV Payload Sensor Mounting Bracket

A small unmanned aerial system needs a lighter, manufacturable bracket for an educational sensor or simulated payload. Your team will define requirements, create and verify the digital manufacturing package, machine the approved part, inspect it, and complete an interface fit test.

Required component evidence

  • Mission and requirements package
  • CAD model and technical drawing
  • Fusion Manufacture setup and toolpath simulation
  • Fusion-posted Mach3 .tap program
  • CNC production log
  • Dimensional inspection and fit-test results
  • Final manufacturing design review

Required component features

  • Assigned airframe interface
  • Payload or sensor interface
  • Cable or connector clearance
  • Exterior contour
  • Weight-reduction feature
  • Tool-compatible radii
  • Approved wall thickness and edge distance
  • Measurable critical dimensions
Certifications and skills

Required Readiness

  • Engineering Safety
  • CNC Certification, including the teacher-observed demonstration
  • Fusion CAD Level 1 or teacher-verified equivalent readiness
  • Engineering Drawings
  • Engineering Documentation
  • Design Review
Key vocabulary

Unit Language

manufacturing processdesign for manufacturabilitydatuminterfacestockworkholdingspindlefeed ratespindle speedchip loadG codeM codemachine coordinateswork coordinatesprogram zeroabsolute positioningincremental positioningtoolpathCAMpost processorsimulationdry runtolerancedimensional errorinspectionfit test
External learning center

Official Manufacturing References

Interactive tools and printable resources

Unit 4 Resource Center