What action is performed by running a CNC program without manufacturing a part to verify logic?

What action is performed by running a CNC program without manufacturing a part to verify logic?

• A. Dry run
• B. Trial run
• C. Shadow machining
• D. Mock up

Answer: (A)

Running a CNC program with no part to make sure the sequence and tool moves are correct is called a dry run. The idea is to execute the code as if cutting, but without engaging the material, so you can trace every move, confirm coordinates, tool changes, and clearances, and catch any potential collisions or errors before any actual machining occurs. This directly serves the goal of verifying the program logic and safety without producing chips or waste. A trial run would typically involve cutting material to test the result, which carries the risk of scrap if something isn’t right. Shadow machining refers to observing or simulating tool paths in a non-cutting way, which is related but not the standard term for validating logic on the machine itself. A mock up is a physical replica used for fit and form checks, not for verifying the CNC program’s logic in the actual machine.

Running a CNC program with no part to make sure the sequence and tool moves are correct is called a dry run. The idea is to execute the code as if cutting, but without engaging the material, so you can trace every move, confirm coordinates, tool changes, and clearances, and catch any potential collisions or errors before any actual machining occurs. This directly serves the goal of verifying the program logic and safety without producing chips or waste.

A trial run would typically involve cutting material to test the result, which carries the risk of scrap if something isn’t right. Shadow machining refers to observing or simulating tool paths in a non-cutting way, which is related but not the standard term for validating logic on the machine itself. A mock up is a physical replica used for fit and form checks, not for verifying the CNC program’s logic in the actual machine.