+ Reply to Thread
Results 1 to 7 of 7
  1. #1
    Senior Member
    Computer Details
    guitarguy1685's Computer Details
    Operating System:
    Window 10
    Computer:
    Dell Precision Tower 5810
    Motherboard:
    Dell
    CPU:
    Intel Xeon ES-1620 v3 @ 3.5GHz
    RAM:
    16GB
    Graphics:
    Nvidia Quadro K4200
    Monitor:
    Dual Dell U2412m
    Discipline
    See details...
    guitarguy1685's Discipline Details
    Occupation
    CAD Manager
    Discipline
    See details below.
    Details
    Building envelops & AES
    Using
    AutoCAD 2017
    Join Date
    Oct 2009
    Posts
    303

    Default Need help on how to model this shape

    Registered forum members do not see this ad.

    H]I consider myself pretty decent at modeling but this shape has me at a loss. I feel like I was on the right track but can't complete the shape. Please see the image in the link below.

    https://i.imgur.com/vPh8B2f.png

    In elevation, the shape is half of an ellipse. In plan I created the curve using Arc->End->Direction. I divided this geometry into 10 equal parts to create the shapes for lofting. So the first shape is an Arc with Chord that is 152.4X7. Each successive shape just gets smaller but at the end I have no shape because width and hight went to zero (feels like a calculus problem).

    so i have no shape to end my loft. So i'm left with the image you see. I thought I could grab the face and pull it and let autocad fill in the geometry. But autocad wont continue the curve of the ellpse. so It leaves me with the image you see far left.

    I dont know where to go from here.

    See attachment here.
    Attached Files

  2. #2
    Quantum Mechanic ReMark's Avatar
    Computer Details
    ReMark's Computer Details
    Operating System:
    Windows 7 Pro 64-bit
    Computer:
    Thinkmate
    Motherboard:
    Intel DX58SO2 LGA1366 X58
    CPU:
    Intel i7-960 Quad-core 3.20GHz 8MB cache
    RAM:
    12GB (3x4GB) PC3-106000 DDR3
    Graphics:
    nVidia Quadro K4200, 4GB GDDR5
    Primary Storage:
    150GB Velocipraptor 10,000 rpm
    Secondary Storage:
    none
    Monitor:
    Dell P24LLH - 24" wide screen LCD
    Discipline
    See details...
    ReMark's Discipline Details
    Occupation
    CAD Draftsman/Designer...chemical manufacturing.
    Discipline
    See details below.
    Details
    I work for a specialty chemical manufacturer. I do a little bit of everything from P&IDs to civil to architectural and structural.
    Using
    AutoCAD 2018
    Join Date
    Nov 2005
    Location
    Norwalk, CT USofA
    Posts
    46,878

    Default

    You wanted the final portion to be a 3D solid right?

    Will this do?

    FlyingWedge.jpg

    I did it using the Point and Loft commands. I recommend the Guides option of the Loft command and selecting the two arc segments either side of the centerline.

    Anything else? I was hoping for more of a challenge. Tired of shoveling snow. LOL
    "I have only come here seeking knowledge. Things they wouldn't teach me of in college." The Police

    Eat brains...gain more knowledge!

    I'm now a full member of the Society for the Promotion of Mediocrity in CAD. Standards? We don't need no stinkin' standards! Take whatever advice I offer and do the opposite.

  3. #3
    Quantum Mechanic ReMark's Avatar
    Computer Details
    ReMark's Computer Details
    Operating System:
    Windows 7 Pro 64-bit
    Computer:
    Thinkmate
    Motherboard:
    Intel DX58SO2 LGA1366 X58
    CPU:
    Intel i7-960 Quad-core 3.20GHz 8MB cache
    RAM:
    12GB (3x4GB) PC3-106000 DDR3
    Graphics:
    nVidia Quadro K4200, 4GB GDDR5
    Primary Storage:
    150GB Velocipraptor 10,000 rpm
    Secondary Storage:
    none
    Monitor:
    Dell P24LLH - 24" wide screen LCD
    Discipline
    See details...
    ReMark's Discipline Details
    Occupation
    CAD Draftsman/Designer...chemical manufacturing.
    Discipline
    See details below.
    Details
    I work for a specialty chemical manufacturer. I do a little bit of everything from P&IDs to civil to architectural and structural.
    Using
    AutoCAD 2018
    Join Date
    Nov 2005
    Location
    Norwalk, CT USofA
    Posts
    46,878

    Default

    An early Christmas present for you.

    The flying wedge.dwg

    Saved in 2010 file format.
    "I have only come here seeking knowledge. Things they wouldn't teach me of in college." The Police

    Eat brains...gain more knowledge!

    I'm now a full member of the Society for the Promotion of Mediocrity in CAD. Standards? We don't need no stinkin' standards! Take whatever advice I offer and do the opposite.

  4. #4
    Senior Member
    Computer Details
    guitarguy1685's Computer Details
    Operating System:
    Window 10
    Computer:
    Dell Precision Tower 5810
    Motherboard:
    Dell
    CPU:
    Intel Xeon ES-1620 v3 @ 3.5GHz
    RAM:
    16GB
    Graphics:
    Nvidia Quadro K4200
    Monitor:
    Dual Dell U2412m
    Discipline
    See details...
    guitarguy1685's Discipline Details
    Occupation
    CAD Manager
    Discipline
    See details below.
    Details
    Building envelops & AES
    Using
    AutoCAD 2017
    Join Date
    Oct 2009
    Posts
    303

    Default

    Quote Originally Posted by ReMark View Post
    Anything else? I was hoping for more of a challenge.
    SAVAGE! lol.

    So how did you do this? I see the point option. I don't know what to do with this. I still end up with an open end.

  5. #5
    Senior Member
    Computer Details
    guitarguy1685's Computer Details
    Operating System:
    Window 10
    Computer:
    Dell Precision Tower 5810
    Motherboard:
    Dell
    CPU:
    Intel Xeon ES-1620 v3 @ 3.5GHz
    RAM:
    16GB
    Graphics:
    Nvidia Quadro K4200
    Monitor:
    Dual Dell U2412m
    Discipline
    See details...
    guitarguy1685's Discipline Details
    Occupation
    CAD Manager
    Discipline
    See details below.
    Details
    Building envelops & AES
    Using
    AutoCAD 2017
    Join Date
    Oct 2009
    Posts
    303

    Default

    Okay, so I think i see what you did. It looks good in elevation but in plan it does not follow the arc. See image below

    https://imgur.com/TiobLBW

    So I picked the first section, used the Point command to select the end of the loft, then I used the ellipse as the guide (I split it in half because I was getting an error otherwise)

    You can see it dips under my curve at the beginning then it bulges out.

  6. #6
    Senior Member
    Computer Details
    guitarguy1685's Computer Details
    Operating System:
    Window 10
    Computer:
    Dell Precision Tower 5810
    Motherboard:
    Dell
    CPU:
    Intel Xeon ES-1620 v3 @ 3.5GHz
    RAM:
    16GB
    Graphics:
    Nvidia Quadro K4200
    Monitor:
    Dual Dell U2412m
    Discipline
    See details...
    guitarguy1685's Discipline Details
    Occupation
    CAD Manager
    Discipline
    See details below.
    Details
    Building envelops & AES
    Using
    AutoCAD 2017
    Join Date
    Oct 2009
    Posts
    303

    Default

    So I'm getting closer. I can get all the other areas to fit my curve but im still getting a bludge at the last section. This time I picked all the cross sections I created, then I used POINT to select the end. Then I used Guides and selected the Ellipse. It's the last section that is still getting me.

  7. #7
    Senior Member
    Computer Details
    guitarguy1685's Computer Details
    Operating System:
    Window 10
    Computer:
    Dell Precision Tower 5810
    Motherboard:
    Dell
    CPU:
    Intel Xeon ES-1620 v3 @ 3.5GHz
    RAM:
    16GB
    Graphics:
    Nvidia Quadro K4200
    Monitor:
    Dual Dell U2412m
    Discipline
    See details...
    guitarguy1685's Discipline Details
    Occupation
    CAD Manager
    Discipline
    See details below.
    Details
    Building envelops & AES
    Using
    AutoCAD 2017
    Join Date
    Oct 2009
    Posts
    303

    Default

    Registered forum members do not see this ad.

    So I think I got it solved. I don't know if this is the correct way to do it but it seems to have worked. Using your method ReMark this is what I did.

    I started with the 1st section, then picked the rest.
    I used the Point option to select the end of the Loft
    Next I used the Guide options and used the 2 ellipse arcs. I added a 3rd guide for the top.
    This gave me my shape but with some excess at the bottom,
    I just sliced this off and voila! I have my shape. I superimposed my wireframe over it to do some spot checking and it looks good.

    screen shot
    https://i.imgur.com/YXPZ4QR.png?1

    Thanks for the direction ReMark. I was really stuck there lol. I learn something new everyday!

Similar Threads

  1. Automitic swap from model to paper space when working in model thru viewport
    By Abbyjay in forum AutoCAD Drawing Management & Output
    Replies: 3
    Last Post: 21st Nov 2012, 04:42 am
  2. Replies: 4
    Last Post: 7th Feb 2011, 02:09 am
  3. Is there a way of converting a Cad Duct model into a solid model in AutoCAD?
    By Keewee in forum AutoCAD 3D Modelling & Rendering
    Replies: 3
    Last Post: 27th Sep 2010, 07:40 pm
  4. How do you draw a shape on the Z axis using the shape tool?
    By cvriv.charles in forum AutoCAD 3D Modelling & Rendering
    Replies: 10
    Last Post: 22nd Feb 2009, 10:47 am

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts