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How to add some overlap at beginning/end of a trace toolpath

ldavis89
Explorer

How to add some overlap at beginning/end of a trace toolpath

ldavis89
Explorer
Explorer

Hi,

 

I have a CNC router setup with a welding head so I can weld sheets of plastic together. I typically use closed loop, trace toolpaths, but I sometimes find it leaves a small gap at the beginning/end where end meets back up with the beginning of the toolpath (imagine a circular trace).

 

Ideally I'd like to add 1/4" of overlap but can't find a consistent way to do it using the free version of Fusion. Using the circle example, I'll add a 1/4" long arc with the same diameter as the circle, select "Keep Tool Down", and select both paths but Fusion will almost always find an order of operations that doesn't work.

 

Hopefully that makes some sense, any pointers?

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ChristopherMarion
Advisor
Advisor
Accepted solution

Hi @ldavis89 

 

You can do this in 2d Contour in the Passes page.

 

2022-01-21_17-11-06.jpg

 

We use this option on the mill side to avoid witness marks where the tool starts and stops in a closed contour.

 

Hope this works for you.

 

Christopher Marion
Technical Specialist - CAM
SolidCAD - Canada





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ldavis89
Explorer
Explorer
Nice, looks like that works! Now I just need to figure the easiest way to get the tool to follow the sketch instead of offset . . but that should be easy enough. Thanks again!
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a.laasW8M6T
Mentor
Mentor

Just set the compensation type to off in the passes tab the tool will follow the contour on center

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