Solutions to CNC Machining Overcutting

helen84827
2 days ago
2 min read

Updated: 5 hours ago

In CNC machining, overcutting can directly affect dimensional accuracy and may even cause parts to be scrapped. The main causes usually come from the program, cutting tools, machine condition, and operator actions. Below is a simple explanation of the common reasons and how to fix them.

Common Causes for CNC Machining Overcutting

1. Programming errors

Incorrect coordinates, tool offsets, or cutting depth settings can cause the tool to move beyond the designed area.

2. Tool deflection

When the tool is too long or lacks rigidity, it may bend during cutting, leading to material being removed where it shouldn’t be.

3. System issues

An unstable CNC system or abnormal program reading/execution can result in machining deviations.

4. Incorrect tool setting

A wrong tool, zero, or reference point, especially an incorrect Z-axis zero, can directly cause excessive cutting depth.

5. Wrong tool installed

The actual tool does not match the program settings, such as incorrect tool diameter or length.

Solutions to CNC Machining Overcutting

1. Optimize and simulate the program

Check the program carefully before machining and use simulation to detect overcutting risks in advance.

2. Control tool length properly

Keep the tool length only as long as needed for machining to reduce tool deflection.

3. Maintain the CNC system regularly

Ensure the system runs stably and follow standard procedures for program management and loading.

4. Improve operator training

Standardize procedures for tool setting, tool installation, and program checking to reduce human errors.

Conclusion

Overcutting is usually not caused by a single issue, but by a combination of several factors. At SG Prototype, preventing overcutting is a key part of our quality control. We continuously learn from experience, improve our prevention methods, upgrade equipment, and standardize operations to effectively avoid quality issues. This helps us achieve higher machining accuracy and efficiency, keep the entire production process under control, and provide reliable services to our customers.