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Boolean Union

famadorian
famadorian Member Posts: 390 ✭✭✭
in Community Support
I don't understand why union doesn't work here to bring all these parts together?;)

https://cad.onshape.com/documents/d6022aa6ddb14022f3bdc386/v/512b3e1860a90572e15ac4fd/e/cd432193c4283b12a46ecbe8


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Best Answer

  • Prachi
    Prachi Member, OS Professional Posts: 262 ✭✭✭
    Answer ✓
    Try changing extrude 5 from a surface to a solid.
    Pretty sure Boolean does not apply to surfaces since there is no volume to add or subtract.

Answers

  • Prachi
    Prachi Member, OS Professional Posts: 262 ✭✭✭
    Answer ✓
    Try changing extrude 5 from a surface to a solid.
    Pretty sure Boolean does not apply to surfaces since there is no volume to add or subtract.
  • famadorian
    famadorian Member Posts: 390 ✭✭✭
    glen_dewsbury said:
    Try changing extrude 5 from a surface to a solid.
    Pretty sure Boolean does not apply to surfaces since there is no volume to add or subtract.
    wow, I didn't see that it was a  surface. 

    Still, it doesn't work;)

    I've rechecked all extrudes and they're all solids now: 

    https://cad.onshape.com/documents/d6022aa6ddb14022f3bdc386/v/6c97b54831dd4a0ef5090ca9/e/cd432193c4283b12a46ecbe8
  • famadorian
    famadorian Member Posts: 390 ✭✭✭
    Sorry, got it now. 

    I created a new Boolean and now it's all AOK;) Thanks
  • famadorian
    famadorian Member Posts: 390 ✭✭✭
    I do wonder though, do I need to model this way?

    Shouldn't I be able to model it as a single object from the start, instead of merging them together at the end?

    It's the extrude option that creates so many separate objects. 
  • Krz
    Krz Member, Developers Posts: 68 ✭✭✭
    If you make Extrude 5 before Extrude 4 then you can use Add instead of New. That way you get 1 closed body everytime.
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  • Prachi
    Prachi Member, OS Professional Posts: 262 ✭✭✭
    Look over the sequence here and see only one part with no boolean.

    https://cad.onshape.com/documents/ba18a2fc12aee47138e1a96b/w/b97174d7e1757224dd5644b2/e/09f7d49698089039fd2204e4
  • famadorian
    famadorian Member Posts: 390 ✭✭✭
    glen_dewsbury said:
    Look over the sequence here and see only one part with no boolean.

    https://cad.onshape.com/documents/ba18a2fc12aee47138e1a96b/w/b97174d7e1757224dd5644b2/e/09f7d49698089039fd2204e4
    Sure;) Got it. Thanks;)
  • Cris_Bowers
    Cris_Bowers Member Posts: 281 PRO
    famadorian said:
    I do wonder though, do I need to model this way?

    Shouldn't I be able to model it as a single object from the start, instead of merging them together at the end?

    It's the extrude option that creates so many separate objects. 
    I've seen a few of your models where you have had questions and I've wondered why you choose to boolean your cabinets together instead of making assemblies from all the separate parts.

    Also you can avoid the boolean operation by using Add when Extruding instead of New and merging the parts together there.


  • famadorian
    famadorian Member Posts: 390 ✭✭✭
    Cris_Bowers said:
    famadorian said:
    I do wonder though, do I need to model this way?

    Shouldn't I be able to model it as a single object from the start, instead of merging them together at the end?

    It's the extrude option that creates so many separate objects. 
    I've seen a few of your models where you have had questions and I've wondered why you choose to boolean your cabinets together instead of making assemblies from all the separate parts.

    Also you can avoid the boolean operation by using Add when Extruding instead of New and merging the parts together there.


    I have 4 parts here: the cabinet, the hangers and two doors.

    I don't think assembly of the hangers is something I should do, cause they are welded together. 

    I do agree that boolean to bring it together is wrong, so I'll try to "add" when extruding and making sure they they intersect, and that I first model the intersecting geometry;)

    https://cad.onshape.com/documents/d6022aa6ddb14022f3bdc386/w/a0b298083f9648005a11ca89/e/08385b13afc990f3ca782804

  • Cris_Bowers
    Cris_Bowers Member Posts: 281 PRO
    @famadorian I don't know your use case is why I was curious. If you're just modelling them for your own needs and don't need to know how to construct the cabinet, your methods are fine. But if the models are intended for constructing the cabinets, I think you would want an assembly so you can detail each part that goes into making it. And a weldment is really just another type of assembly.
  • 3dcad
    3dcad Member, OS Professional, Mentor Posts: 2,482 PRO
    I used to do a lot of 'single part modeling' to see the looks before creating parts file by file and adding 3 mates between each two parts to complete assembly.

    But with Onshape it's so easy to pull whole cabinet from single sketch and select between 'New' and 'Add' that it just makes no sense to create those dumb solids anymore. From part studio to assembly takes no more than 10 seconds to add whole ps, select all, add group mate - finished and ready for manufacturing drawings with full part list.
    //rami

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