In the world of precision manufacturing and digital path planning, choosing the right step-over strategy is critical for balancing efficiency and surface quality. This article explores the fundamental differences between Linear Step-over and Dynamic Step-over movements.
What is Linear Step-over?
Linear step-over follows a fixed, constant distance between toolpasses. It is the traditional approach used in standard 2D and 3D milling. While simple to calculate, it often leaves inconsistent "scallop" heights on complex organic surfaces.
Understanding Dynamic Step-over
Dynamic step-over (often referred to as constant scallop or 3D step-over) adjusts the distance between passes based on the part's geometry. By maintaining a uniform surface roughness, it ensures that steep walls and flat floors receive the same level of finish quality.
Key Comparison Factors
| Feature | Linear Step-over | Dynamic Step-over |
|---|---|---|
| Path Consistency | Fixed XY distance | Varying distance based on slope |
| Surface Finish | Uneven on slopes | Highly uniform |
| Calculation Time | Fast | Computationally intensive |
Conclusion: Which one to choose?
The Linear approach is best for simple, flat prismatic parts where speed is a priority. However, for complex 3D molds and aerospace components, the Dynamic approach is the gold standard for achieving superior surface integrity without manual intervention.
CNC Machining, Toolpath Optimization, Linear vs Dynamic, Manufacturing Engineering, 3D Modeling, CAD CAM Tips
