In the world of precision manufacturing, burr formation is a persistent challenge that affects part quality and increases production costs. While tool selection is crucial, implementing specific G-Code techniques can significantly minimize burrs directly during the machining process.
1. Exit Path Optimization (Deburring via Toolpath)
One of the most effective ways to reduce burrs is to control how the tool exits the workpiece. Instead of a straight exit, using a rolling-around-the-corner technique ensures the cutting forces are directed inward.
G01 X50.0 Y0.0 F150 ; Linear cut
G03 X52.0 Y2.0 R2.0 ; Circular lead-out to reduce exit burr
2. Implementing Feed Rate Reduction at Exit Points
High feed rates at the edge of a material often lead to "exit burrs" due to material rollover. By modifying your G-Code to decelerate near the edges, you provide a cleaner shear.
Example: Using G01 with reduced feed F at critical junctions.
3. Climbing vs. Conventional Milling
For most materials, Climb Milling (G41) is preferred to minimize burrs. It creates a chip that starts thick and thins out at the exit, reducing the pressure that pushes material over the edge.
4. Chamfering and Deburring Passes
Integrating a dedicated deburring pass using a 45-degree chamfer tool in your CNC programming is the most reliable method. A simple G01 movement along the edge after the main profile can save hours of manual labor.
