G-code for Spiral Milling and Helical Milling is widely used in CNC machining to create circular pockets, holes, and complex contours with high precision. These milling techniques improve cutting efficiency, surface finish, and tool life.
What Is Spiral Milling?
Spiral milling is a CNC machining process where the cutting tool moves in a spiral path on a single Z-level. This method is commonly used for pocket milling and circular interpolation, allowing smooth material removal and consistent cutting load.
What Is Helical Milling?
Helical milling combines circular motion (X and Y axis) with linear movement along the Z-axis. This technique is ideal for machining deep holes, threads, and precision bores without drilling. Helical interpolation reduces tool stress and improves chip evacuation.
Basic G-code Example for Spiral Milling
G90 G17 G21 G0 X0 Y0 Z5 G1 Z-2 F200 G3 X0 Y0 I20 J0 F300 G0 Z5
This spiral milling G-code example demonstrates circular interpolation using the G3 command. The tool gradually removes material while maintaining a constant cutting radius.
Basic G-code Example for Helical Milling
G90 G17 G21 G0 X0 Y0 Z5 G1 Z-1 F150 G3 X0 Y0 I15 J0 Z-10 F250 G0 Z5
In this helical milling G-code example, the cutter moves downward along the Z-axis while performing circular interpolation, creating a smooth helical toolpath.
Advantages of Spiral and Helical Milling
- Improved surface finish
- Reduced cutting forces
- Longer tool life
- Higher machining accuracy
Conclusion
Understanding G-code for spiral and helical milling is essential for CNC programmers and machinists. These techniques offer superior control, efficiency, and precision for modern CNC machining applications.
G-code, CNC Milling, Spiral Milling, Helical Milling, CNC Programming, Machining
