TERRYH

Avoidance geometry

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was trying to use this function and it is greyed out and cannot get it to work is there somewhere you need to turn that function on? 

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Some toolpaths do not utilize the avoidance geometry

In those cases the boundary or covering surfaces should be used

 

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Yes, not all HST path styles support avoidance geometry.  In this case, try "Equal scallop" rather than "Scallop".  Equal scallop supports avoidance geometry and offers several other benefits beyond Scallop.

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A lot of times I'll make a new geometry group with a bigger stay away. For things like fixtures Even when avoidance geometry is available I think some toolpaths don't like it or take longer to process with it

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Back in X7 Scallop had "Check Surfaces", did this turn into Equal Scallop?

 

 

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On 11/10/2020 at 5:33 PM, Leon82 said:

A lot of times I'll make a new geometry group with a bigger stay away. For things like fixtures Even when avoidance geometry is available I think some toolpaths don't like it or take longer to process with it

The ability to add multiple, separate groups of geometry, each with an independent stock offset, was a significant improvement for all of the surface paths. I've been able to create some amazing toolpaths with this feature, and was able to avoid having to create additional control geometry. I'm very happy they were able to add this.

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In X7 thru MC2017, it is possible to select check/avoidance geometry in HST-Scallop but a warning message is issued indicating it would be treated as drive/machining geometry (with the drive stock to leave applied).  In later releases in the 3D HST VS2L (Variable Stock To Leave) dialogs, it is a bit harder to select avoidance geometry in HST-Scallop.  By twists and turns (such as changing style to Raster, making avoidance selection and changing back to Scallop) you can get avoidance geometry selected but the processing rule still applies - for Scallop, it will be treated as machining geometry.  So Equal Scallop is the way to go - it allows avoidance geometry.

Classic surface finish/scallop was the first Mastercam toolpath with a 3D stepover over an arbitrary set of geometry.  It worked pretty well but small features could introduce noise in the resulting path (not as smooth as one might desire).  HST-Scallop was the second 3D stepover.  It also worked pretty well (offering the 3D HST lead and linking features) but could chamfer sharp corners in the offset passes.  HST Equal Scallop is the third 3D stepover (you could say third generation).  It works carefully to produce crisp equidistant offset passes over arbitrary geometry.  It also offers a spiral option.

Please try HST-Equal Scallop - it should meet your needs.  If not or if you notice that HST-Scallop or finish/scallop yields a better path, please send us a sample.  Thank you!

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