fusion 360 pocket after facing


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  1. #1
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    Question fusion 360 pocket after facing

    Hi

    hope someone can explain this to me.

    i have a part that is 6mm in height. My stock is 6.45. i use a facing tool path that removes .45 making the stock 6mm in height.

    I have a pocket that is only meant to remove 2mm but when i run the simulation its removing 2.45mm

    Ive tried selecting the top height from the top of the model in the tool path settings but it still removes 2.45mm.

    can anyone help?






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  2. #2
    Community Moderator difalkner's Avatar
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    Default Re: fusion 360 pocket after facing

    In your setup for this piece is the height shown as 6.45mm or is there stock added (default setting for Stock Top Offset adds stock)?

    David

    David
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    Member precisionmetal's Avatar
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    Default Re: fusion 360 pocket after facing

    Can you send me your model and I'll take a look at it. Should be an easy fix.

    thx
    PM


    PS: You probably know, but just in case.....

    Click..... File / Export .... then make sure the Archive Type is set to .f3d..... and make sure the checkbox at the bottom that says "Save to my computer" is checked... then Save. At that point, you should just be able to attach it to a private msg to me (or attach it to a post in this thread if you want everyone to have access).



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    Gold Member LeeWay's Avatar
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    Default Re: fusion 360 pocket after facing

    If you know you will be facing the top, then don't model the actually stock being faced off. Just add that as Stock in setup.

    Then do the facing op.
    Then when you choose rest machining, it knows that you have faced it already. You also choose Model top rather than Stock top to machine.

    Lee


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    Default Re: fusion 360 pocket after facing

    Thank you for your responses.

    I have found if i run facing last and select one face it works out ok. i did expect it to take into account i had already faced the part before the pocket operation. maybe this is how the software works or i have missed something.



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    Default Re: fusion 360 pocket after facing

    Quote Originally Posted by LeeWay View Post
    If you know you will be facing the top, then don't model the actually stock being faced off. Just add that as Stock in setup.

    Then do the facing op.
    Then when you choose rest machining, it knows that you have faced it already. You also choose Model top rather than Stock top to machine.
    are you saying to face the part as a totally seperate tool path then use the prepped stock as the default stock setup?



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    Default Re: fusion 360 pocket after facing

    Quote Originally Posted by LeeWay View Post
    If you know you will be facing the top, then don't model the actually stock being faced off. Just add that as Stock in setup.

    Then do the facing op.
    Then when you choose rest machining, it knows that you have faced it already. You also choose Model top rather than Stock top to machine.
    I tried setting the top to the top of the model on that tool path but the for some reason the pocket still cuts down to -2.45mm but it does start at the correct height.

    - - - Updated - - -

    Quote Originally Posted by precisionmetal View Post
    Can you send me your model and I'll take a look at it. Should be an easy fix.

    thx
    PM



    PS: You probably know, but just in case.....

    Click..... File / Export .... then make sure the Archive Type is set to .f3d..... and make sure the checkbox at the bottom that says "Save to my computer" is checked... then Save. At that point, you should just be able to attach it to a private msg to me (or attach it to a post in this thread if you want everyone to have access).

    thank you. i have pm;d you with a link



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    Gold Member daniellyall's Avatar
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    Default Re: fusion 360 pocket after facing

    If you have the stock set to 6.45 and put in stocktop for the top height of course it will be going down 2.45 that's what you told it to do start from the stock top, change it to model top for the top hight and it will cut 2 mm deep from the model top.

    <img src="https://ivxo1q-dm2305.files.1drv.com/y4mENMmTr_Cabc7pR0FUdB6gtbADq2JbuG4_rGy0eBQvLJx19pTi6TqMUIJN0xgOyDIc0gWoxYhS38HpbSTFGdfaK-o42IOU6jczrhDpfpCOTNGL1X6hvZCbgj0y35gqmq1YGTrWwShYGV-C7lXA2esy0Pi_WfnBSyroDLSGXwce4uSr1U7op7srdi78rispHCa_K4aFlTlJPVkkNWMfgh_Tg?width=60&height=60&cropmode=none" width="60" height="60" />

    Being Disabled is OK CNC is For fuN


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    Default Re: fusion 360 pocket after facing

    Quote Originally Posted by daniellyall View Post
    If you have the stock set to 6.45 and put in stocktop for the top height of course it will be going down 2.45 that's what you told it to do start from the stock top, change it to model top for the top hight and it will cut 2 mm deep from the model top.
    Thats correct but i need to tell fusion where the z0x0y0 are and i cant set the model as the zero point because the stock ihasnt been faced or cut.



  10. #10
    Gold Member daniellyall's Avatar
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    Default Re: fusion 360 pocket after facing

    You can on the second operation after the faceing it's gone and you know it is you are the boss not fusion.

    Have a look at the example it's a faceing op and a 3D pocket and A 2D pocket run them together there is no crash, run the 3D pocket by itself there is one crash into what will not be there after the faceing op.

    Attached Files Attached Files
    Last edited by daniellyall; 01-22-2018 at 05:03 AM.
    <img src="https://ivxo1q-dm2305.files.1drv.com/y4mENMmTr_Cabc7pR0FUdB6gtbADq2JbuG4_rGy0eBQvLJx19pTi6TqMUIJN0xgOyDIc0gWoxYhS38HpbSTFGdfaK-o42IOU6jczrhDpfpCOTNGL1X6hvZCbgj0y35gqmq1YGTrWwShYGV-C7lXA2esy0Pi_WfnBSyroDLSGXwce4uSr1U7op7srdi78rispHCa_K4aFlTlJPVkkNWMfgh_Tg?width=60&height=60&cropmode=none" width="60" height="60" />

    Being Disabled is OK CNC is For fuN


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    Default Re: fusion 360 pocket after facing

    Quote Originally Posted by daniellyall View Post
    You can on the second operation after the faceing it's gone and you know it is you are the boss not fusion.

    Have a look at the example it's a faceing op and a 3D pocket and A 2D pocket run them together there is no crash, run the 3D pocket by itself there is one crash into what will not be there after the faceing op.
    that appears to be what i am trying to achieve. You have faced the stock and then the tool path has started from the correct height after the facing operation.

    You have created a body for you stock which is something i didn't do. Any chance you could have at my fusion file and see where i am going wrong?

    link here: A360



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    Default Re: fusion 360 pocket after facing

    Quote Originally Posted by daniellyall View Post
    You can on the second operation after the faceing it's gone and you know it is you are the boss not fusion.

    Have a look at the example it's a faceing op and a 3D pocket and A 2D pocket run them together there is no crash, run the 3D pocket by itself there is one crash into what will not be there after the faceing op.
    i think ive resolved this now thanks to your example.

    Im going to run the code on my machine at some point this week and test it.



  13. #13
    Gold Member LeeWay's Avatar
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    Default Re: fusion 360 pocket after facing

    This is one of the major head scratchers in Fusion until you get it. The other one for me was setting up the offsets in the initial setup of the job. The third thing that was a little tough was that some operation just would not post any tool paths. usually that was because of the lead in settings. Play with those some and you get to understand what all it is wanting from you.
    I still get tripped up every now and then.
    It really helps to save templates for more complicated parts especially if you have similar parts or even just one or two similar ops. Use what you need and delete the others that get populated.
    Many many good videos on Fusion 360.
    Check them out at Youtube sometime if you haven't yet.

    Lee


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fusion 360 pocket after facing

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