A machinist can pick a value by feel, based on previous experience, or do the math and calculate the exact value that will give them the finish required. It is not a stretch to say that it is the single most important parameter in determining the quality of the finished parts you will produce. One of the fundamental parameters of any CNC machining, and 3D machining in particular, is the stepover. It’s a very clear explanation of how to choose a stepover and I particularly like his analysis of the “sweet spot” for stepover. This post originally appeared on the Grzsoftware Blog. This is a guest post by Robert Grzesek, founder of Grzsoftware and creator of the excellent MeshCAM 3D CAM software. How to Choose a Stepover for 3D Profiling CNC Milling Feeds and Speeds Cookbook
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