Lesson 5: The Production Run
Duration of Days: 5
Lesson Objective
SWBAT:
Execute a CNC program and utilize the "Feed Overide" and "Emergency Stop" features appropriately.
Perform a "First-Article Inspection" to verify the finished part matches the original blueprint
How do the sounds and vibrations of the machine tell you if the cut is successful?
If a part comes out "undersized," which stage of the process (CAD, CAM, or Setup) was likely responsible?
Emergency Stop, Feed Override, Cycle Start, Single Block, Burrs, Deburring, Inspection, Tolerancing.
CT-CTE.MFG.G.48 (Manufacture a part using CNC); CT-CTE.MFG.D.23 (Identify quality control procedures).
DOK Level: 4 (Extended Thinking
The culmination of the unit. Students execute their programs to create functional vehicle components. The purpose is to practice "Safe Machining" by monitoring the cut and adjusting settings in real-time.
Misconception: "Once I hit 'Start', I can walk away."
Correction: An operator must remain at the machine to listen for tool wear or potential failures.
Support: Run the program in "Dry Run" mode (in the air) before cutting actual metal to build confidence.
Extension: Students perform a "Post-Mortem" analysis on a failed part to determine the root cause of the error.
The Machined Artifact: Submission of a finished, deburred part that passes a dimensional inspection against the original design specifications.