CNC machining is renowned for precision, speed, and versatility. While 5-axis CNC machining excels in handling complex geometries, 3+2 machining offers a cost-effective alternative for many applications, balancing efficiency and accuracy with reduced expenses.
What is 3+2 Machining?
Traditional CNC mills require re-fixturing parts for multi-surface access, consuming time and increasing error risks. 3+2 machining eliminates this by adding rotational axes (A and C) to the fixed X, Y, and Z axes, allowing better access to cutting surfaces without repositioning parts manually.
Benefits of 3+2 Machining
1. Efficiency
- Fewer setups lead to faster turnaround times.
- Shorter and more rigid tooling ensures faster speeds.
- Improved access to complex geometries reduces machining time.
2. Enhanced Accuracy
- Minimal re-fixturing allows for tighter tolerances.
- Reduced human intervention eliminates positioning errors.
3. Cost Savings
- Reduced machining time lowers overall costs.
- Accurate cuts minimize material waste and rework.
4. Complexity Handling
- Improved endmill access enhances precision on intricate designs.
- Ideal for parts with angled features or complex housings.
Applications for 3+2 Machining
3+2 machining is particularly suited for:
- Injection molding molds
- Complex housings
- Parts with angled or multi-sided features
3+2 Machining vs. 5-Axis CNC Machining
Feature | 3+2 Machining | 5-Axis CNC Machining |
Cost | More affordable | Higher due to advanced capabilities |
Programming | Easier to program | More complex programming requirements |
Applications | Handles multiple sides but not all sides | Handles extremely complex geometries |
Setup Requirements | Fewer setups, ideal for most parts | Continuous toolpath control for faster results |
Design Considerations for 3+2 Machining
For most designs, 3+2 machining offers an excellent balance of cost, speed, and accuracy. However, parts with extreme geometries may require the advanced capabilities of full 5-axis CNC machining.
CNC machining offers precision, speed, and versatility with various materials, including plastics and metals. For more complex parts, advanced milling techniques like 3+2 machining bridge the gap between traditional machining and full 5axis CNC machining, providing a cost-efficient solution.