Why is it crucial to review the machining program before operation?

Reviewing the machining program before operation is crucial primarily to avoid potential errors and ensure machining accuracy. This step is important because it allows the operator to identify any mistakes in the programming, such as incorrect tool paths, improper feed rates, or settings that could lead to substandard parts being produced or even damage to the machine.

By thoroughly reviewing the program, the operator can verify that all necessary parameters are correctly set and that the program aligns with the desired specifications. This scrutiny helps to prevent costly errors that could result in wasted materials, machine downtime, or safety hazards. Additionally, accurate machining ensures that the finished product meets quality standards, thereby increasing customer satisfaction and reducing the need for rework or scrapping defective parts.

While aspects like efficiency, time-saving, and cost calculations are also important in the CNC machining process, they become secondary to the primary goal of ensuring that the machining operation runs smoothly and produces high-quality components.