CNC Programmer how-to

How to Program a Simple Milled Part in CAM

A consistent workflow produces safe, efficient programs.

Updated By the Career Education Institute Curriculum Team
Quick answer

A consistent workflow produces safe, efficient programs. In short: import; set; choose, then complete the remaining steps below.

Step by step

  1. Import the 3D model and set the stock size.

  2. Set the work coordinate system to match the planned fixture.

  3. Choose tools from the shop’s tool library.

  4. Create roughing toolpaths, leaving finish stock.

  5. Add finishing, drilling and chamfering operations.

  6. Simulate the program, check for collisions and post the code.

Safety reminders for CNC programmers

  • Keep machine doors closed and guards in place
  • Simulate programs before running them
  • Wear eye protection on the shop floor
  • Follow lockout procedures when working in machines

G-code · M-code · CAM · Toolpath · Post processor · Work offset: see the full CNC programmer glossary.

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