770 user surface finish problems on interpolation moves


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    Default 770 user surface finish problems on interpolation moves

    770 user surface finish problems on interpolation moves-image1-jpg
    anyone experience this? my machine is fairly new with only maybe 80hrs tops on it. any ideas please.

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    Default Re: 770 user surface finish problems on interpolation moves

    Are you using Fusion360? If so, that looks a bit pronounced but fairly typical for 2d adaptive clearing. Adaptive clearing is primarily a roughing strategy and it should be followed by a finishing strategy like 2d contour. Make sure you leave a bit of stock in the adaptive so that you have enough to clean up. You can also adjust the tolerance and add smoothing to your contour operation. Here is a short article that explains smoothing.

    https://www.nexgencam.com/hsm-tips-t...ing-tolerances



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    Default Re: 770 user surface finish problems on interpolation moves

    You can also get something similar at the CAD stage if you ungroup or breakdown (maybe twice depending on you cad package) a circle or arc or other curved object, it goes from a smooth curve to a series of straight lines that are not always obvious on screen unless you zoom in.

    Phil



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    Quote Originally Posted by jonniemac View Post
    Are you using Fusion360? If so, that looks a bit pronounced but fairly typical for 2d adaptive clearing. Adaptive clearing is primarily a roughing strategy and it should be followed by a finishing strategy like 2d contour. Make sure you leave a bit of stock in the adaptive so that you have enough to clean up. You can also adjust the tolerance and add smoothing to your contour operation. Here is a short article that explains smoothing.



    https://www.nexgencam.com/hsm-tips-t...ing-tolerances
    Thanks for the reply, I'll look into that when I get home. Tormach responded to my email also. Pretty damn quick, less than a day. I'm still very new to fusion and adaptive clearing. Didn't realize it was only for ruffing. I just duplicated and unchecked stock to leave. Thought would be good. I hope I can save this piece. Lol.



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    Quote Originally Posted by philbur View Post
    You can also get something similar at the CAD stage if you ungroup or breakdown (maybe twice depending on you cad package) a circle or arc or other curved object, it goes from a smooth curve to a series of straight lines that are not always obvious on screen unless you zoom in.

    Phil
    Thanks for the input. Much appreciated. An thanks for not flamming my noobness to. Lol



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    Default Re: 770 user surface finish problems on interpolation moves

    Adaptive clearing threw me too when I first switched to Fusion :-)



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    Default Re: 770 user surface finish problems on interpolation moves

    Looks to me like whatever you programmed it with cut a bunch of lines instead of a circle.

    What did you use to generate tool path for this part?

    You can buy GOOD PARTS or you can buy CHEAP PARTS, but you can't buy GOOD CHEAP PARTS.


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    Default Re: 770 user surface finish problems on interpolation moves

    That also looks the sort of faceting that you get with an STL file. Did you ever mention which CAD and CAM software that you are using?



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770 user surface finish problems on interpolation moves
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