CNC Programmer how-to
How to Prove Out a New CNC Program
Prove-out protects the machine, the tooling and the first part.
Quick answer
Prove-out protects the machine, the tooling and the first part. In short: review; verify; run, then complete the remaining steps below.
Step by step
Review the setup sheet with the machinist.
Verify tool lengths and work offsets.
Run the first tool in single block with feed override reduced.
Watch clearance moves and approach carefully.
Measure critical features after each operation.
Adjust and save the proven program.
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
Key terms
G-code · M-code · CAM · Toolpath · Post processor · Work offset: see the full CNC programmer glossary.