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James-Railway-Street
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2D Contour Wrap Not Following Full Contour

I'm trying to create a 2D contour wrap toolpath to simulate the Gcode needed for a rotary plasma cutter given that Fusion doesn't support that in the plasma tool paths. 

 

I've created a 60deg cope as a test piece and a 1.5mm end mill to simulate the kerf of the plasma. When trying to get the tool paths to work I get some strange outputs where it is providing somewhat of a rotary tool path, but is only really half of the mirrored contour. 


I've tried selecting inner and outer contours, inner and outer faces with the same result - trying to select unwrap geometry gives me the "Contour Selection: Cannot unwrap cyclic geometry." error. 

 

This seems like a pretty basic contour toolpath for a 4th axis but I'm stuck as to what I'm doing wrong.

 

 

Screenshot 2024-05-10 at 9.05.36 pm.png

Screenshot 2024-05-10 at 9.10.13 pm.png

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Hi

The issue is you cannot currently  use Cyclic geometry with Wrap (a contour that starts and finishes in the same place )

The reason you get a toolpath at all is because you have unticked "Unwrap Geometry"

This obviously results in an incorrect toolpath.

 

The best option here is to use Advanced swarf set to 4 axis mode, but you will need the Manufacturing extension

see attached

 

Thanks for the file. I can see it works. I guess this is one of those frustrating Fusion quicks as it progresses further down the maturity path. I've been avoiding getting the machining extension as I do next to no complicated multi-axis machining (all really 4th axis positional) and this at least seems like a tool path that should be available in the standard features. Guess I'll be getting some credits this year.

Thanks again.

Hard to really see what's going on, but you should be able to draw the shape on a flat plane, then wrap the toolpath in 2d contour. You will want to use 2d contour as you would "trace". Basically set no radial tool compensation.

I'm currently doing it without issue, however my machine had an issue with it going on both sides of 0/360 degrees, so I had to change my orientation, basically putting the toolpath on the "backside" of the part, so it would play around between 0 and 360 degrees, and not have to cross that boundry of 0/360 degrees, because it would want to "unwind" while in the cut, which was bad!

Yea currently its a bit annoying that you can't do a pretty simple(Cyclic) path with Wrap, but I believe this is being worked on so it will be able to do it, when this will be fixed is unknown, they did fix the ability to machine open pockets with wrap 2d adaptive recently.

 

You can break it up into two toolpaths that machine part way around each, but that's less than Ideal, also you can try @tacticalkeychains suggestion of sketching the unwrapped path on a plane and wrapping that way.

 

Even if you only do mostly positional work , the extension its super useful for other reasons, Deburr toolpath is fantastic and the toolpath trimming is also really handy