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Mastering Swept 3D Toolpaths in Mastercam: A Step-by-Step Guide

In the world of CNC machining, the ability to produce intricate designs efficiently hinges on the proficiency of the software in use. Mastercam is recognised worldwide for its precision and advanced toolpaths, with Swept 3D being one of its prime features. In our latest video, we take a deep dive into creating and modifying geometries, and finally, generating a Swept 3D toolpath.


1. The Basics of Geometry Creation and Manipulation

  • Starting with the Base Point: Every design begins with a reference. Our video kicks off with the selection of the pivotal base point.

  • Entity Offset & Chain Selection: The offsetting of entities creates parallel entities. Chains, a series of connected entities, are pivotal in 3D modeling. We demonstrate how to harness the power of the shift-click feature to capture tangent entities effortlessly.

  • Extruding into the Third Dimension: With the chains in place, we step into the realm of 3D by extruding them. For those looking for thorough extrusions, our 'Through All' command walkthrough will be invaluable.

  • Smoothing Edges with Face-to-Face Fillet: For smoother transitions and refined aesthetics, the face-to-face fillet comes into play. We illustrate this not once, but twice, to ensure mastery over this crucial feature.

  • Dynamic Rotation – A New Perspective: Visualise better with dynamic rotation. This segment aids in obtaining the most optimal views of your work.


2. Crafting the Swept 3D Toolpath

  • Setting Boundaries: Before diving into the Swept toolpath, boundaries must be outlined. Our video elucidates the distinction between the 'across' and 'along' boundaries.

  • Tool Selection – Ball vs. Flat Endmill: The tool sets the tone for the final product. We delve into when and how to select the spherical ball endmill and the flat-bottomed flat endmill.

  • Defining Cutting Methods: Cutting methods bring precision to machining. We shed light on how to designate the cutting method for both directions, throwing in a segment on the advanced 5-axis cutting method for the aficionados.


To truly harness the power of Mastercam and its Swept 3D toolpaths, visual learning is essential. Head over to our video guide for a comprehensive walkthrough. And for the budding CNC programmers out there, this is your ticket to levelling up your game!

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