<br> [MAS.865](../..) &gt; [Path Planning](..) &gt; Adaptive Clearing ## Adaptive Clearing <div style="margin-left:2.5%"> Sometimes referred to as **high-speed machining** although that is also the case for trochoidal paths. * [Adaptive clearing in HSMWorks](https://knowledge.autodesk.com/support/hsm/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Inventor-HSM/files/GUID-970298C7-2F2E-47E6-AD54-454DEC0BBD7C-htm.html) * Roughing strategy for clearing large amount of material * Seeks maximum tool load constantly (to reduce tool wear) * Allows cutting deep (tool length) and with the flank of the tool * [Helical post](https://solidedging.wordpress.com/2015/03/16/adaptive-clearing-the-secret-weapon-of-autodesk-hsmworks-and-inventor-hsm/) * [Video from AutoDesk](https://www.youtube.com/watch?v=1TgYz_LBdkw) * [Instructables Adaptive Roughing](http://www.instructables.com/lesson/3D-Adaptive-Roughing/) * [Freesteel](https://www.freesteel.co.uk/images/blog/brochure.pdf) * Center of force is half-way up the tool, reducing deflection and the potential for vibration ### Region Growing with Spirals ![Region growing for high-speed machining](growing.jpg) * [A smooth spiral tool path for high speed machining of 2D pockets](https://www.sciencedirect.com/science/article/pii/S0010448509001031), Computed-Aided Design 2009 * Computes skeleton of shape * Start at center and spirals outwards * [MATHSM: medial axis transform toward high speed machining of pockets](https://www.sciencedirect.com/science/article/pii/S0010448504001228), Computer-Aided Design 2005 * Fits largest possible circles to each region (i.e. their center is the medial axis) * Use circles from center outwards to define the tool path * [Path Generation for High Speed Machining Using Spiral Curves](http://repository.ust.hk/ir/Record/1783.1-18441) * Medial Axis Transform * Considering different spirals ([Clothoid spiral](https://en.wikipedia.org/wiki/Euler_spiral) = constant curvature, [Archmedean spiral](https://en.wikipedia.org/wiki/Archimedean_spiral) = constant angular velocity) ### Medial Axis Transform Also known as [Skeletonization](https://homepages.inf.ed.ac.uk/rbf/HIPR2/skeleton.htm). The [medial axis](https://en.wikipedia.org/wiki/Medial_axis) corresponds to the set of points that have more than one closest point on the object's boundary. See: * [Voronoi diagram](https://en.wikipedia.org/wiki/Voronoi_diagram) = partitioning of the a plane into regions based on distance to points * [Medial meshes](https://arxiv.org/abs/1308.3917) * [Manifold Approximation of 3D Medial Axis](Manifold Approximation of 3D Medial Axis) * [Mean Curvature Skeletons](https://github.com/ataiya/starlab-mcfskel) * [Q-MAT](https://www.cs.purdue.edu/cgvlab/talks/Spring16/glunchChris.pdf#page=2) ![Voronoi diagram](voronoi.png)