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Thread: Spring

  1. #1
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    Default Spring

    This was done using AutoCAD 2004
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    Mod / Salary / SM Wanderer's Avatar
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    Talking Re: Spring

    Quote Originally Posted by aledtaylor
    This was done using AutoCAD 2004
    Very neat looking. (i need to get out more, or pay more attention to work. I saw the thread title and was expecting flowers and singing birds )
    Melanie Stone
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    Certifiable AUGI Addict robert.1.hall72202's Avatar
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    Default Re: Spring

    Very nice! I look at some of the images posted and in my 2d world I just can't imagine how to create these 3d models. I tried drawing a computer mouse once and that was no easy task.

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    Default Re: Spring

    Quote Originally Posted by aledtaylor
    This was done using AutoCAD 2004
    Very cool. Can you tell us briefly how it was done?
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    Default Re: Spring

    Springs:

    Use ‘3dspiral.lsp’ (attached). As the name suggests, it draws a 3D spiral.

    Draw a spiral with 180 points per rotation. One segment is omitted so rotate 2 degrees as required.

    Draw a circle with the centre at one end of the spiral and set it at an angle perpendicular to the slope angle (you can calculate this angle in advance).

    Extrude the circle along the path. (Any profile will twist when extruded along the spiral but since a circle is used, this doesn’t matter.)

    Produce another spiral with a shallow pitch for the ends. Extrude a circle along it as before.

    Join the segments with spheres at the intersection points to fill the gaps.

    Make rectangular blocks and subtract them from the ends to create flat surfaces.

    Embossed text:

    Draw text using a true-type font. Use Express tools to explode the text. Convert the exploded text to regions. Extrude to make solids. Reposition the text and subtract the solids from the spring.

    Wood surface:

    Place a wood sample onto a flatbed scanner and scan. Use the image to create a material for rendering.
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    Last edited by aledtaylor; 2005-09-30 at 03:06 PM.

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    100 Club Kris.Keller's Avatar
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    Default Re: Spring

    Quote Originally Posted by aledtaylor
    Springs:

    Use ‘3dspiral.lsp’ (attached). As the name suggests, it draws a 3D spiral.

    Draw a spiral with 180 points per rotation. One segment is omitted so rotate 2 degrees as required.

    Draw a circle with the centre at one end of the spiral and set it at an angle perpendicular to the slope angle (you can calculate this angle in advance).

    Extrude the circle along the path. (Any profile will twist when extruded along the spiral but since a circle is used, this doesn’t matter.)

    Produce another spiral with a shallow pitch for the ends. Extrude a circle along it as before.

    Join the segments with spheres at the intersection points to fill the gaps.

    Make rectangular blocks and subtract them from the ends to create flat surfaces.

    Embossed text:

    Draw text using a true-type font. Use Express tools to explode the text. Convert the exploded text to regions. Extrude to make solids. Reposition the text and subtract the solids from the spring.

    Wood surface:

    Place a wood sample onto a flatbed scanner and scan. Use the image to create a material for rendering.
    Very nice, Thank you for sharing how you did this fine work.

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    Member david.rees's Avatar
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    Smile Re: Spring

    just a quicky if you dont want to use the lisp supplied.
    draw a torus which intersects a block in the middle
    subtract the block to get half a torus
    mirror this back so it looks full
    rotate on half round the intersection by how ever many degrees you wont the sping to stand though
    copy the flat section up to the other end of the half torus which has been rotated and rotated by the same angle -.
    copy this up to created the sping the union the whole lot.
    do the same to get the flat ends and number stamp.
    i'm not supposed to use external lisp routines in the office so i have to find ways round it.

    i really like this and it looks way to easy till you try and make a spring very very nice.

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    100 Club Kris.Keller's Avatar
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    Default Re: Spring

    aledtaylor,

    Thank you again for sharing how you created your springs. Just today I had to create something very similar and it worked wonderful.

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    100 Club tlewald's Avatar
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    Red face Re: Spring

    nice job!

    thanks for also sharing the .lsp & technique.

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    Default Re: Spring

    Quote Originally Posted by david.rees
    just a quicky if you dont want to use the lisp supplied.
    draw a torus which intersects a block in the middle
    subtract the block to get half a torus
    mirror this back so it looks full
    rotate on half round the intersection by how ever many degrees you wont the sping to stand though
    copy the flat section up to the other end of the half torus which has been rotated and rotated by the same angle -.
    copy this up to created the sping the union the whole lot.
    do the same to get the flat ends and number stamp.
    i'm not supposed to use external lisp routines in the office so i have to find ways round it.

    i really like this and it looks way to easy till you try and make a spring very very nice.
    Thanks for the feedback.

    Using a torus is a good idea but there are a couple of problems.

    1: When you turn the spring through 90 degrees it looks very different.

    2: When viewed from the end, it’s elliptical.

    Alternatively, if you’re not allowed to use lisp routines, you could draw a 3D polyline and extrude along it. (Use the array command to create circles and lines to make a grid and set the osnap to ‘intersection’ before drawing the 3D polyline).

    Aled Taylor
    Design Engineer

    (File size is someone else’s problem)
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