13
July
2012

The Minimum Cutting Radius Parameter

The Adaptive Clearing strategy is designed to always produce smooth cutting passes - as long as there is stock left on a given machining level. When approaching the model for the final pass, the smoothness of the toolpath will however depend on the geometry - and the minimum cutting radius parameter.

Without specifying a minimum cutting radius, you will get a tight trochoidal motion with sharp movements - but only if the geometry has sharp corners like the indent on the right:

 

No29 image-0001

Minimum Cutting Radius = 0

By setting the minimum cutting radius to 1mm, the toolpath indent on the right becomes a lot smoother, while the indent on the left is not affected since the geometry is already smoothened by a R5mm fillet which is sufficient for the 5mm tool used:

 

 No29 image-0002

Minimum Cutting Radius = 1mm


Increasing the minimum cutting radius above 2.5mm (the tool radius) will also smoothen the left indent, and the right one even more:

 

 No29 image-0003

Minimum Cutting Radius = 4mm


Note, that smoothening in this way will leave more horizontal stock than specified by the Radial Stock To Leave parameter. This is normally acceptable when the Adaptive Clearing is used for roughing, but does of course require that the following operations are created with this in mind.

  • Tags: 2D Toolpaths, 3D Toolpaths, Adaptive Clearing, High Speed Machining, Roughing

Categories: HSM Tips and Tricks

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