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70 Posts
Discussion Starter #1
Except for Matlab, which I'm forced to use for research, I use only open
source software. For drawings, I use the GPL'd community version of QCAD for
all of my 2-D drafting needs. http://www.qcad.org/qcad_downloads.html It
looks like only the source is available for download from RibbonSoft, which
is sort of disappointing. If you're on linux, just check your package
manager. QCAD is in the repositories for Ubuntu.

Unfortunately, open source is a bit behind with respect to 3D engineering
drawing. Blender <http://www.blender.org/> is a really nice package but
targeted primarily at artists. That being said, this fellow has done some
beautiful engineering drawings using Blender
http://www.rab3d.com/tutorial.html.

I'm also keeping an eye on FreeCAD,
http://sourceforge.net/apps/mediawiki/free-cad/index.php?title=Main_Page,
which is on SourceForge. This looks very promising, but I have not had time
to do much exploration with it.

Others I'm aware of, but have no experience with include,
BRL-CAD<http://brlcad.org/> and
OpenSCAD <http://openscad.org/>.

Anyone know of other good open source drafting packages?

Best,

Bryan

George Tyler <[email protected]> wrote:

> I use turbocad, it takes some time to learn, but is fairly cheap. There are
> shops selling it for $50 up.
>
> http://www.trademe.co.nz/Computers/Software/Graphics-multimedia/auction-3301
> 64797.htm
> this one is Around USD$100, has 3D, creates all the common file formats, I
> used it for drawing parts for my Daihatsu conversion. what you think of it?
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf
> Of Lee Hart
> Sent: Sunday, 7 November 2010 4:01 a.m.
> To: Electric Vehicle Discussion List
> Subject: Re: [EVDL] life decisions: was :Re: It is time to raise the bar,
> to
> more Sophisticated Conversions !
>
> On 11/5/2010 11:24 PM, K O wrote:
> > Is it now impossible to share software among
> > team members?
>
> Yes. Except for the free programs, they're all copy protected in one way
> or another. You often can't even put your own copy on both your desktop
> and laptop.
>
> And, the good ones charge monthly or yearly maintenance fees, or the
> program quits working.
>
> > Why can't someone LEND Lee Hart the technology to get
> > his project documented?
>
> In fact, a kind soul has done exactly that! It's how I could try
> Solidworks. It's a great program, but not one I can learn alone.
>
> > Sorry about your buck-a-month, Lee .. I had to redirect the funds...
>
> That's OK, KO. I understand. It's a common problem; people are
> struggling just to stay where they are, and so can't afford to build for
> the future.
>
> --
> Lee A. Hart | Ring the bells that still can ring
> 814 8th Ave N | Forget the perfect offering
> Sartell MN 56377 | There is a crack in everything
> leeahart earthlink.net | That's how the light gets in -- Leonard Cohen
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 9.0.864 / Virus Database: 271.1.1/3226 - Release Date: 11/06/10
> 08:34:00
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>
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Discussion Starter #2
For one of my current home projects I am using OpenSCAD -
http://openscad.org/ which is a *parametric modeller*, somebody else's
description:

"OpenSCAD is a software for creating solid 3D CAD objects... OpenSCAD is
not an interactive modeller. Instead it is something like a 3D-compiler
that reads in a script file that describes the object and renders the 3D
model from this script file (see examples below). This gives you (the
designer) full control over the modelling process and enables you to
easily change any step in the modelling process or make designs that are
defined by configurable parameters."

Here's an example script for a box shaped like a Lego block ( see
http://www.kellbot.com/2010/06/meta-lego-storage/):

fundamental_unit = 0.8;
thickness = 3;
h_pitch = 10;
v_pitch = 12;
tform = 5;
knob = fundamental_unit*h_pitch*tform;
module side(rows){
lwidth = rows*fundamental_unit*h_pitch*tform;
lheight = v_pitch*fundamental_unit*tform;
difference() {
square(size=[lwidth, lheight]);
translate(v=[10,0,0]) square(size=[lwidth-20,thickness]);
translate(v=[10,lheight-thickness,0]) square(size=[lwidth-20,thickness]);
square(size=[thickness, 10]);
translate(v=[0,lheight-10]) square(size=[thickness, 10]);
translate(v=[lwidth-thickness,10]) square(size=[thickness, lheight-20]);
}
}
module top(rows,cols,holes){
lwidth = rows*fundamental_unit*h_pitch*tform;
llength = cols*fundamental_unit*h_pitch*tform;
difference(){
square(size=[lwidth,llength]);
square(size=[thickness,10]);
square(size=[10,thickness]);
translate(v=[lwidth,0,0]) square(size=[-thickness,10]);
translate(v=[lwidth,0,0]) square(size=[-10,thickness]);
translate(v=[lwidth,llength]) square(size=[-10,-thickness]);
translate(v=[lwidth,llength]) square(size=[-thickness,-10]);
translate(v=[0,llength]) square(size=[10,-thickness]);
translate(v=[0,llength]) square(size=[thickness,-10]);
if(holes==true){
for (i = [1:cols]){
for (j=[1:rows]){
translate(v=[j*knob-knob/2,i*knob-(fundamental_unit*h_pitch*tform)/2,0]) circle(r=fundamental_unit*6*tform/2);
}
}
}
}
}

rows = 2;
cols = 4;

h_spacing = rows*fundamental_unit*h_pitch*tform+10;
l_spacing = cols*fundamental_unit*h_pitch*tform+10;
v_spacing = fundamental_unit*v_pitch*tform+10;

side(rows);
translate(v=[ rows*fundamental_unit*h_pitch*tform+10,0,0]) side(rows);
translate(v=[0,v_spacing]) side(cols);
translate(v=[ cols*fundamental_unit*h_pitch*tform+10,v_spacing]) side(cols);
translate(v=[0,2*v_spacing]) top(rows,cols,true);
translate(v=[ rows*fundamental_unit*h_pitch*tform+10,2*v_spacing]) top(rows,cols,false);

Bryan Wilcox wrote:
> Except for Matlab, which I'm forced to use for research, I use only open
> source software. For drawings, I use the GPL'd community version of QCAD for
> all of my 2-D drafting needs. http://www.qcad.org/qcad_downloads.html It
> looks like only the source is available for download from RibbonSoft, which
> is sort of disappointing. If you're on linux, just check your package
> manager. QCAD is in the repositories for Ubuntu.
>
> Unfortunately, open source is a bit behind with respect to 3D engineering
> drawing. Blender <http://www.blender.org/> is a really nice package but
> targeted primarily at artists. That being said, this fellow has done some
> beautiful engineering drawings using Blender
> http://www.rab3d.com/tutorial.html.
>
> I'm also keeping an eye on FreeCAD,
> http://sourceforge.net/apps/mediawiki/free-cad/index.php?title=Main_Page,
> which is on SourceForge. This looks very promising, but I have not had time
> to do much exploration with it.
>
> Others I'm aware of, but have no experience with include,
> BRL-CAD<http://brlcad.org/> and
> OpenSCAD <http://openscad.org/>.
>
> Anyone know of other good open source drafting packages?
>
> Best,
>
> Bryan
>
> On Sat, Nov 6, 2010 at 3:14 PM, George Tyler <[email protected]> wrote:
>
> > I use turbocad, it takes some time to learn, but is fairly cheap. There are
> > shops selling it for $50 up.
> >
> > http://www.trademe.co.nz/Computers/Software/Graphics-multimedia/auction-3301
> > 64797.htm
> > this one is Around USD$100, has 3D, creates all the common file formats, I
> > used it for drawing parts for my Daihatsu conversion. what you think of it?
> >
> > -----Original Message-----
> > From: [email protected] [mailto:[email protected]] On
> > Behalf
> > Of Lee Hart
> > Sent: Sunday, 7 November 2010 4:01 a.m.
> > To: Electric Vehicle Discussion List
> > Subject: Re: [EVDL] life decisions: was :Re: It is time to raise the bar,
> > to
> > more Sophisticated Conversions !
> >
> > On 11/5/2010 11:24 PM, K O wrote:
> > > Is it now impossible to share software among
> > > team members?
> >
> > Yes. Except for the free programs, they're all copy protected in one way
> > or another. You often can't even put your own copy on both your desktop
> > and laptop.
> >
> > And, the good ones charge monthly or yearly maintenance fees, or the
> > program quits working.
> >
> > > Why can't someone LEND Lee Hart the technology to get
> > > his project documented?
> >
> > In fact, a kind soul has done exactly that! It's how I could try
> > Solidworks. It's a great program, but not one I can learn alone.
> >
> > > Sorry about your buck-a-month, Lee .. I had to redirect the funds...
> >
> > That's OK, KO. I understand. It's a common problem; people are
> > struggling just to stay where they are, and so can't afford to build for
> > the future.
> >
> > --
> > Lee A. Hart | Ring the bells that still can ring
> > 814 8th Ave N | Forget the perfect offering
> > Sartell MN 56377 | There is a crack in everything
> > leeahart earthlink.net | That's how the light gets in -- Leonard Cohen
> >
> > _______________________________________________
> > | REPLYING: address your message to [email protected] only.
> > | Multiple-address or CCed messages may be rejected.
> > | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> > | OTHER HELP: http://evdl.org/help/
> > | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
> >
> > No virus found in this incoming message.
> > Checked by AVG - www.avg.com
> > Version: 9.0.864 / Virus Database: 271.1.1/3226 - Release Date: 11/06/10
> > 08:34:00
> >
> > _______________________________________________
> > | REPLYING: address your message to [email protected] only.
> > | Multiple-address or CCed messages may be rejected.
> > | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> > | OTHER HELP: http://evdl.org/help/
> > | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
> >
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> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 

·
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Joined
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70 Posts
Discussion Starter #3
Apologies list, I missed seeing OpenSCAD at the bottom of Bryan's list.

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
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