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  1. #1
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    Default Subtracting Lofted Surface using Extruded Surface - Doesn't Work

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    Hi all,

    Problem:
    fan_blade1.png

    Green Surface = Extruded Surface
    Red Surface = Lofted Surface

    I'm trying to subtract the green surface from the red surface.

    Commands Tried:
    - Subtract
    - Surftrim

    So far these two didn't work out very well. "Subtract" didn't do anything at all, while "Surftrim" helped me to get rid of anything outside of the cutting surface.

    But the problem: After Surftrim, the lofted surface's inside shows out, and I found out that it's not solid/filled inside, but rather it's a hollow space inside the lofted surface.

    I'm trying to create a fan blade, and using that green surface as a shape-maker.

    Anyone has any idea?

    P.S. The original post and picture owner is in this link
    http://www.cadtutor.net/forum/showth...able-fan-blade

  2. #2
    Super Member kencaz's Avatar
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    Default

    Quote Originally Posted by dulerong View Post
    Hi all,

    Problem:
    Attachment 28140

    Green Surface = Extruded Surface
    Red Surface = Lofted Surface

    I'm trying to subtract the green surface from the red surface.

    Commands Tried:
    - Subtract
    - Surftrim

    So far these two didn't work out very well. "Subtract" didn't do anything at all, while "Surftrim" helped me to get rid of anything outside of the cutting surface.

    But the problem: After Surftrim, the lofted surface's inside shows out, and I found out that it's not solid/filled inside, but rather it's a hollow space inside the lofted surface.

    I'm trying to create a fan blade, and using that green surface as a shape-maker.

    Anyone has any idea?

    P.S. The original post and picture owner is in this link
    http://www.cadtutor.net/forum/showth...able-fan-blade
    All the lofted objects on my original fan were 3d Solids, thus you should be able to join, subtract, and slice...

    Here is the original file:

    fan_blade.zip

    KC
    Some of my AutoCAD and Inventor Pics and Videos...
    http://www.youtube.com/kencaz45



  3. #3
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    Default

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    Hi Kencaz,

    Thank you for your reply and file.

    Question:
    Your blade is 3D Solid, when I checked its property.
    What function did you use to join up the "regioned profile faces" to make it a 3D Solid?

    Also, what function did you use to trim the area outside of the extruded surface off of the 3D solid?
    - Neither "Subtract" nor "Surftrim" works for me.

    ***Actually "Slice" worked for me.
    ***For some reason, LOFT keeps creating surface for me, I set the mode = SOLID but it still ends up being a surface

    Actually I just found my own solution to the LOFTing problem.
    Problem:
    I regioned the polyline spaces before LOFTing them. This actually made LOFT command "UNABLE" to make it into a 3D Solid.

    I don't know why, and hopefully someone can tell me, but so far I've managed to get my 3D Solid off of LOFT.

    Thanks for your help once again
    Last edited by dulerong; 13th Jun 2011 at 06:56 pm.

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