Introduction to CNC Technology

What is CNC Technology?


CNC Technology


  • CNC stands for “computer numerical coding.”
  • Design software translates designs into G-code which then read by the CNC machine.
  • The Earliest CNC machines appeared in 1940
  • CNC milling a subtractive method that removes material from a piece block of metal using drill bits. 
  • CNC machines can mill using 1, 2, 2.5, 3, 4, or 5 axis.

What is CNC Machining and How Does it Work?




Can you think of any items you use that may have been made with CNC technology?

CNC Technology for Jobs & Employment 


Manufacturing Worker Deficit

(source: American factories are desperate for workers. It’s a $1 trillion problem - CNN)

  • American manufacturing activity at a 37 year high as of March 2021.
  • As many as 2.1 manufacturing jobs projected to be unfilled through 2030.
  • Part of the shortage is due to concerns about globalization and automation.

Types of CNC Jobs

  • CAD Designer: Models designs that are translated into G-Code.
  • CNC Mechanist: Programs the machinery  and assess mechanical issues.
  • CNC Operator: Stocks material and runs the machine. 

Organizations for CNC Training

Jane Addams Resource Corporation (JARC)


Jane Addams Resource Corporation (JARC)

  • 5 free programs available: Mechanical Assembly, CNC Operators Fast Track, Manufacturing Bridge Program, Welding Fast Track, Brake Press Fast Track
  • 1 paid program available for 3-D printing + forklift certification ($250)
  • Free adult education in reading, language, math and computers. 


Program Locations



640 E. 79TH ST., CHICAGO, IL 60619


Daley College & CCC


CCC Programs


  • Communications Technology
  • Computer Numeric Control Machining
  • Electrical Construction Technology
  • Factory Automation
  • Quality Assurance
  • Welding

Daley College Manufacturing Technology & Engineering Center

  • 7500 S Pulaski Rd, Chicago, IL 60652
  • Basic certificates (16 credit hours) and advanced certificates (37 credit hours)  available

CNC Technology for Art and Design

Can you think of designs you want to make with the CNC machine?


What makes CNC a better  choice for making that object than 3D printing or laser cutting?

Machines for Hobbyists 

Carbide Shapeoko 4 Standard

  • Dust boot included 
  • Work area: X-axis: 17.5” Y-axis: 17.5” Z-axis: 4”
  • Cost: $1,700

Inventables X-Carve 1000mm

  • Uses both 1/4” and 1/8” shank diameter bits 
  • Work area: X-axis: 29.5” Y-axis: 29.5” Z-axis: 2.5”
  • Cost: $2,299

Inventables Carvey

  • Wood, Plastic
  • Work Area: X-axis: 12 inches , Y-axis: 8 inches , Height: 2.75 inches
  • No longer available for purchase

Design Software


Easel Walkthrough