Merging sub-assemblies?

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From: Terrypin <[hidden email]>
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Date: Wed, 12 May 2021 06:03:20 -0700 (MST)
Subject: [OpenSCAD] Re: Merging sub-assemblies?
Here's my version based on hull with cylinders. I also used the exercise to learn how to work with modules, so that I can make more of these in future.

// 'Dry box' for dual mains sockets
// Used 'hull with cylinders' method
// Dimensions: length = x = 143, width = y = 83, height = z = 25, roundness = r = 6, thickness = t = 3 to match existin top

$fn = 48; // Have been using 50 but recently read somewhere that multiples of 4 are recommended?

module round_edges_box(x,y,z,r) {
hull() {
translate([r,r,0])
cylinder(h=z,r=r);
translate([x-r,r,0])
cylinder(h=z,r=r);
translate([x-r,y-r,0])
cylinder(h=z,r=r);
translate([r,y-r,0])
cylinder(h=z,r=r);
} // End of hull
} // End of module round_edges_box

// Different name for 'fully parametrised' version

module rounded_edges_box(x,y,z,r,t) {
  // Hollow the solid by subtracting the smaller (and translated) version below  
 difference(){   
round_edges_box(x,y,z,r);
translate([t,t,t]) // Moves smaller box out from origin
round_edges_box(x-(2*t),y-(2*t),(z+10),r);   
}
}
rounded_edges_box(143,83,25,6,3);

The top for the box is shown here:
https://www.dropbox.com/s/m90ckyv7u5phnwa/DualMainsSockets-1.jpg?raw=1

I estimated the roundness, r, by finding an object that fitted a corner neatly; this pad had a radius of about 3mm:

https://www.dropbox.com/s/n6zjhnv8d8r0019/RoundnessEstimate.jpg?dl=0httraw=1

P.S. I originally used 'Insert Image' for the two photos but preview showed them at full size. Hence my reverting to links. How should images be displayed in familiar thumbnail form, or limited to screen size for reasonable viewing please?

---

Sent from the OpenSCAD mailing list archive at Nabble.com.



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From: Terrypin via Discuss <[hidden email]>
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Date: Wed, 12 May 2021 06:03:20 -0700 (MST)
Subject: [OpenSCAD] Re: Merging sub-assemblies?
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I think image size depends on your email client. In gmail I get size options.

On Wed, 12 May 2021 at 14:41, Terrypin via Discuss <[hidden email]> wrote:

---------- Forwarded message ----------
From: Terrypin <[hidden email]>
To: [hidden email]
Cc: 
Bcc: 
Date: Wed, 12 May 2021 06:03:20 -0700 (MST)
Subject: [OpenSCAD] Re: Merging sub-assemblies?
Here's my version based on hull with cylinders. I also used the exercise to learn how to work with modules, so that I can make more of these in future.

// 'Dry box' for dual mains sockets
// Used 'hull with cylinders' method
// Dimensions: length = x = 143, width = y = 83, height = z = 25, roundness = r = 6, thickness = t = 3 to match existin top

$fn = 48; // Have been using 50 but recently read somewhere that multiples of 4 are recommended?

module round_edges_box(x,y,z,r) {
hull() {
translate([r,r,0])
cylinder(h=z,r=r);
translate([x-r,r,0])
cylinder(h=z,r=r);
translate([x-r,y-r,0])
cylinder(h=z,r=r);
translate([r,y-r,0])
cylinder(h=z,r=r);
} // End of hull
} // End of module round_edges_box

// Different name for 'fully parametrised' version

module rounded_edges_box(x,y,z,r,t) {
  // Hollow the solid by subtracting the smaller (and translated) version below  
 difference(){   
round_edges_box(x,y,z,r);
translate([t,t,t]) // Moves smaller box out from origin
round_edges_box(x-(2*t),y-(2*t),(z+10),r);   
}
}
rounded_edges_box(143,83,25,6,3);

The top for the box is shown here:
https://www.dropbox.com/s/m90ckyv7u5phnwa/DualMainsSockets-1.jpg?raw=1

I estimated the roundness, r, by finding an object that fitted a corner neatly; this pad had a radius of about 3mm:

https://www.dropbox.com/s/n6zjhnv8d8r0019/RoundnessEstimate.jpg?dl=0httraw=1

P.S. I originally used 'Insert Image' for the two photos but preview showed them at full size. Hence my reverting to links. How should images be displayed in familiar thumbnail form, or limited to screen size for reasonable viewing please?

---

Sent from the OpenSCAD mailing list archive at Nabble.com.



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From: Terrypin via Discuss <[hidden email]>
To: [hidden email]
Cc: Terrypin <[hidden email]>
Bcc: 
Date: Wed, 12 May 2021 06:03:20 -0700 (MST)
Subject: [OpenSCAD] Re: Merging sub-assemblies?
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I use AngelCAD to process OpenSCAD scripts when processing those scripts
directly in OpenSCAD either takes too long or results in flawed STL files.

I find the F5 function in OpenSCAD to be crucial to my development. 
Being able to highlight a line in the code with a "#", or to change a
color or use "%" is essential.  The lack of that feature in AngelCAD is
a show-stopper for me.  Carsten does not seem to feel that these
functions are as important to him as they are to me.

That said, AngelCAD is a wonderful tool for some specific situations.

Jon

On 5/12/2021 10:30 AM, Ray West wrote:
> On 12/05/2021 00:20, adrianv wrote:
>> If you're going to use AngelCAD then....why not just use AngelCAD?
>
> I have used AngelCAD, in fact I prefer the structure/language to
> openscad scripting, however, the quick f5 rendering in openscad is
> useful, and there is more activity here, on the openscad mailing list,
> always someone/s can help when you get stuck. Unfortunately, there are
> very few folk, at least that I know of, who have an active interest in
> AngelCAD, which imnsho is a great pity. However, it is easy enough for
> anyone using openscad to drop in the openscad script into AngelCAD and
> quickly get an stl file - in a few seconds instead of many minutes, in
> many cases.
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>
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On 12/05/2021 14:03, Terrypin via Discuss wrote:
> Here's my version based on hull with cylinders. I also used the
> exercise to learn how to work with modules, so that I can make more of
> these in future.

Nice, glad you got there. Being critical, the rounded corners do not
look correct (as in the socket plate)., and you've still got to add the
blocks for the plate screw fixings, and probably cable holes and screw
holes.The internal radius should be less than the external. Still, If
you're happy, then that is good enough. I've written an extruded
version, I could post it, but maybe you'd rather try it for yourself,
although I've tried to include the steps in getting there. (and then
others can say I've got it wrong too 😁)
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On 12.05.2021 16:42, jon wrote:
> I use AngelCAD to process OpenSCAD scripts when processing those scripts
> directly in OpenSCAD either takes too long or results in flawed STL files.
>
> I find the F5 function in OpenSCAD to be crucial to my development.
> Being able to highlight a line in the code with a "#", or to change a
> color or use "%" is essential.  The lack of that feature in AngelCAD is
> a show-stopper for me.  Carsten does not seem to feel that these
> functions are as important to him as they are to me.
>
> That said, AngelCAD is a wonderful tool for some specific situations.

My thinking has been that OpenSCAD needs preview because full processing
is sometimes very slow, but in AngelCAD full processing is often close
to instantaneous, so the need for preview is much less.

Clearly the preview with colours and everything in OpenSCAD is very
nice, but it is a very different line of development than what has been
the main focus in AngelCAD, i.e.

a) Use a full blown language that runs, not just declares
b) Processing speed

If you want preview and you have an .scad model, you can use OpenSCAD
for that. If you have the same .scad script open in OpenSCAD and
AngelCAD, it should refresh in both editors automatically if saved to
disk. Press F5 in OpenSCAD for the  preview and when ready press F6 in
AngelCAD to generate the STL.

Carsten Arnholm
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