Cabriole leg machining

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Cabriole leg machining

Postby Lee Wood » Tue May 14, 2019 10:49 am

Hello Vectric Community

I have recently bought a Chinese CNC with a 4th axis and have been trying to machine an STL file of a cabriole leg. My problem is I have no idea what to set as the model thickness since it not even on all sides. I have tried to watch videos on you tube but this step is always missing. How do i go about it?

Charles.
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Re: Cabriole leg machining

Postby TReischl » Tue May 14, 2019 1:16 pm

Pay attention when you import the stl file.

The import screen will show you the length and diameter of the model and allow you to scale the model.

Capture.JPG
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Re: Cabriole leg machining

Postby Lee Wood » Tue May 14, 2019 6:14 pm

Hello TReischl

Thanks for your response. On importing the stl file the values indicated were length 391.427mm which i set at 400mm while the diameter indicated was 99.221mm which i used 100mm for the material. The others were Gap outside model 0.043 and the model thickness set itself at 49.608 while the model plane was 0.349mm. I used a 12mm ball nose for roughing but I stopped the roughing process when i realized it was almost roughing to the center. My guess was because of the Model thickness but I have no clue what to set it.

Charles.
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Re: Cabriole leg machining

Postby TReischl » Tue May 14, 2019 8:49 pm

Not sure what you are making?

Some models do not have material left around the centerline, those are a problem.

One thing you can do is model up a small cylinder, say 6mm in diameter and see if that surface shows through on your model. That will tell you a lot about where your model is in relation to the centerline of the rotary.

Other than that, you might want to post a screen capture of what your model looks like. BTW, what is your toolpath preview showing you?
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Re: Cabriole leg machining

Postby Lee Wood » Wed May 15, 2019 12:18 am

Hi TReischl

This is the stl file I've been working on.
Charles
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cabriole stl file.PNG
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Re: Cabriole leg machining

Postby Rcnewcomb » Wed May 15, 2019 12:50 am

Oh, I know that leg well. It takes some fiddling to get the model adjusted so the centerline is covered.
Under Help/Video Tutorial Browser look for the video Rotary Import & Unwrap Full 3D starting at the 4 minute mark.
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Re: Cabriole leg machining

Postby Lee Wood » Wed May 15, 2019 8:31 pm

Hi Rcnewcomb,
I have now watched this tutorial and its very similar to what I need to do. I will practically do it and post the results. Many thanks.
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