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"Smoothing" allows cutting into model in 3d parallel finish

evanp4509U4JZ
Collaborator

"Smoothing" allows cutting into model in 3d parallel finish

evanp4509U4JZ
Collaborator
Collaborator

I must be doing something wrong from the start to have these issues. When I ran the 3d parallel simulation on this part I noticed a scallop on each end that cut into the model. I tried every machining boundary option in geometry and still had the same scallop. Upon magnification and inspection I noticed every other tool path had a swoop at the end that cut into the model area. I turned off the "smoothing" option in "passes" and the swoop disappeared. I ran the simulation and the scallop disappeared. Is that normal for the smoothing option to ignore the model? My smoothing allowance is set to .0004". The scallop is nearly .125" deep into the model. Is there some artifact from the construction process that is causing this? I really don't know that much about CAD/CAM and this kind of thing is really frustrating me. The problem is in the 3D parallel finish pass. Any suggestions?

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HughesTooling
Consultant
Consultant

I don't see any gouging around the part.

Capture2.PNG

 

Here's what I see, all the green linking lines are above the blue cutting toolpaths.

Clipboard05.png

One thing I noticed was you were using a fast simulation that's very rough, setting to standard looks better.

 

I rearranged the toolpaths so the adaptive removes all the material around the part so you can see better what's going on and moved the 2d contour above the parallel cut and the edges all look good. It all looked good how you had it setup as well it's just easier to see with the outer wall removed. 

 

I disabled the timeline in the model workspace and deleted the mesh to make the file smaller for uploading, the 20mb mesh takes too long to upload on my broadband.

 

Mark 

Mark Hughes
Owner, Hughes Tooling
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evanp4509U4JZ
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LOL. Here's what I got calculating it on my computer.

Thanks for the heads up about the mesh. I'll exclude those in the future. Any idea why the difference?

 

 

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evanp4509U4JZ
Collaborator
Collaborator

This is the tool path

 

 

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HughesTooling
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Consultant

Can you attach the file with that toolpath. The file you attached before didn't look like that so I'm not sure what's different. 

 

Mark

Mark Hughes
Owner, Hughes Tooling
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evanp4509U4JZ
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Here it is, mesh and timeline free. The difference comes in between having smoothing checked or not. I tried it 2x each way last night and same result. I'm lost.

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HughesTooling
Consultant
Consultant
Accepted solution

Yes that definitely seems like a bug. @jeff.pek  can you take a look at the file in post #6.

 

@evanp4509U4JZ Don't think I'd ever set the boundary to tool outside like that as the toolpath can waterfall all around the edge. If I want the tool to go past the edge I'd create a helper surface and select in just the horizontal OP, see screencast. Fusion doesn't have an option for tangential extensions on 3d toolpaths so you need to create a surface. I'm using the new UI in the screencast, if you still use the old one pick the patch workspace from the workspace menu.

 

Mark

Mark Hughes
Owner, Hughes Tooling
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evanp4509U4JZ
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I am always surprised and flabbergasted with technology. I assumed that it did that on its own with all the capabilities it has. Good to know. I'm still wrapping my thought process around turning things on and off in a model. Coming from a fabrication background, once something gets welded in, it's there. Not so much digitally. I'd still be able to select the actual model perimeter for the contour pass to establish the perimeter to fit into our press.

Thank you.

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