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Is it possible to design 3D woodturning projects with CAD on a Raspberry Pi

Former Member

Right sorry if this sounds a bit daft (I am a compleat novice at this computer, software & engineering thing) I am a professional woodturner and I stumbled Across the raspberry pi by accident and was wondering if it was capable of doing the following

 

i want to design my woodturning projects on the computer but find CAD 3D design completely mind boggling so i am looking to use something like this Creative Woodturner - Woodturning Design Software - See a stunning 3D view of your woodturning design its a program for windows that's used to design (via nodes and a 2D view) objects made on a lathe with a 3D CAD output it would be really helpful just to know if it's possible on a raspberry pi

 

 

all help is appreciated

 

Craftycraigy

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  • Hi again Craig.

     

    Thanks to bring this up here. I have been fiddling with the way the program you posted do things and I've found a very easy way to create woodturning - or any lathe machined piece - with inkscape and OpenSCAD that fits quite well in my workflow.

     

    You just need in inkscape to clone one line and mirror it, so any edit you do in the first line, is done in its mirror.

     

    That way the two 2D profiles would be a slice of the part.

     

    https://dl.dropboxusercontent.com/u/88765973/inkscape_woodturn.webm (you need a webm player to watch this video, such as google chrome, opera, firefox browsers or explorer with WebM MF components http://www.webmproject.org/ie/ ).

     

    To finally make a slice, I close the paths just drawing a line between the top ends and bottom ends, and combine them using inkscape tools ( Combine Path and Join Node).

     

    image

     

    Now I have to export this 2D path to DXF to be imported by other tools. The most compatible way is just to divide the path in as many small lines as possible, because basic shapes are easily recognized among different tools.

     

    For this just use two Inkscape tools Extensions > Modify Paths > Add Nodes and after selecting all nodes the toolbar button "Make selected segments lines".

     

    Fullscreen 4331.contentimage_176457.html Download 
    <html><head><title>Jive SBS</title></head>
<body><font face="arial,helvetica,sans-serif">
<b>Error</b><br><font size="-1">
An general error occurred while processing your request.
</font></font></body></html>

     

    After that I can just export it as DXF.

     

    Once we have that slice the only thing we have to do is to center it in one axis, extrude it a bit so it becomes a 3D part and copy the slice rotating it 360 times, one time for the circumference degrees. Of course we have to move it one degree more in each step to complete 0 to 360 degrees.

     

    This translated to OpenSCAD language would be, as seen on the video below:

     

    width = 531;

for( i = [0:360] ){
     rotate(a=[0,i,0]){
          translate([-width/2,0,0])
               linear_extrude(height=4)
                    import("file.dxf");
     }
}

     

    The code on OpenSCAD to do it would be always the same just editing the width of the piece and changing the file name.

     

    In the video and the picture below I took the width of the bottom part, and the top was widder, so to center the piece I used a different translation. In this case -width/3.

     

    But is much easier to just use the part width so it will always be -width/2.

     

    https://dl.dropboxusercontent.com/u/88765973/openscad_woodturn.webm (you need a webm player to watch this video, such as google chrome, opera, firefox browsers or explorer with WebM MF components http://www.webmproject.org/ie/ ).

     

    After that the resulting STL can be loaded in a 3D program such as Blender or SolidWorks, or converted to gcode to make the part in a CNC lathe.

     

    Fullscreen 5811.contentimage_176458.html Download 
    <html><head><title>Jive SBS</title></head>
<body><font face="arial,helvetica,sans-serif">
<b>Error</b><br><font size="-1">
An general error occurred while processing your request.
</font></font></body></html>

    I would not add more to this thread, because this is sightly out of topic here, as I don't think many people would be interested in 3D design, mills, lathes and routers here. But feel free to send me a private message if you need more information about how to add wood textures to the piece, or any other related topic.

     

    Edit: unfortunately looks like the videos don't work. I have changed the players for a Dropbox link. Will try to convert the videos later.

Reply

  • Hi again Craig.

     

    Thanks to bring this up here. I have been fiddling with the way the program you posted do things and I've found a very easy way to create woodturning - or any lathe machined piece - with inkscape and OpenSCAD that fits quite well in my workflow.

     

    You just need in inkscape to clone one line and mirror it, so any edit you do in the first line, is done in its mirror.

     

    That way the two 2D profiles would be a slice of the part.

     

    https://dl.dropboxusercontent.com/u/88765973/inkscape_woodturn.webm (you need a webm player to watch this video, such as google chrome, opera, firefox browsers or explorer with WebM MF components http://www.webmproject.org/ie/ ).

     

    To finally make a slice, I close the paths just drawing a line between the top ends and bottom ends, and combine them using inkscape tools ( Combine Path and Join Node).

     

    image

     

    Now I have to export this 2D path to DXF to be imported by other tools. The most compatible way is just to divide the path in as many small lines as possible, because basic shapes are easily recognized among different tools.

     

    For this just use two Inkscape tools Extensions > Modify Paths > Add Nodes and after selecting all nodes the toolbar button "Make selected segments lines".

     

    Fullscreen 4331.contentimage_176457.html Download 
    <html><head><title>Jive SBS</title></head>
<body><font face="arial,helvetica,sans-serif">
<b>Error</b><br><font size="-1">
An general error occurred while processing your request.
</font></font></body></html>

     

    After that I can just export it as DXF.

     

    Once we have that slice the only thing we have to do is to center it in one axis, extrude it a bit so it becomes a 3D part and copy the slice rotating it 360 times, one time for the circumference degrees. Of course we have to move it one degree more in each step to complete 0 to 360 degrees.

     

    This translated to OpenSCAD language would be, as seen on the video below:

     

    width = 531;

for( i = [0:360] ){
     rotate(a=[0,i,0]){
          translate([-width/2,0,0])
               linear_extrude(height=4)
                    import("file.dxf");
     }
}

     

    The code on OpenSCAD to do it would be always the same just editing the width of the piece and changing the file name.

     

    In the video and the picture below I took the width of the bottom part, and the top was widder, so to center the piece I used a different translation. In this case -width/3.

     

    But is much easier to just use the part width so it will always be -width/2.

     

    https://dl.dropboxusercontent.com/u/88765973/openscad_woodturn.webm (you need a webm player to watch this video, such as google chrome, opera, firefox browsers or explorer with WebM MF components http://www.webmproject.org/ie/ ).

     

    After that the resulting STL can be loaded in a 3D program such as Blender or SolidWorks, or converted to gcode to make the part in a CNC lathe.

     

    Fullscreen 5811.contentimage_176458.html Download 
    <html><head><title>Jive SBS</title></head>
<body><font face="arial,helvetica,sans-serif">
<b>Error</b><br><font size="-1">
An general error occurred while processing your request.
</font></font></body></html>

    I would not add more to this thread, because this is sightly out of topic here, as I don't think many people would be interested in 3D design, mills, lathes and routers here. But feel free to send me a private message if you need more information about how to add wood textures to the piece, or any other related topic.

     

    Edit: unfortunately looks like the videos don't work. I have changed the players for a Dropbox link. Will try to convert the videos later.

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