generative modeling for Rhino
Grillage Fabrication
(A double-post from the Discussion section, but this post should probably live here...)
All,
I put together a utility definition to create a grillage (waffle) surface for laser cutter fabrication. Please feel free to use it (at your own risk...). I plan to make improvements to this base configuration in the future.
Features:
_Specify the uniform spacing for each of two (A = above, B = below) orthographic cut planes;
_Specify the rotation (angle) of the orthographic cut planes to the reference surface;
_Fine tune the start of A or B cut planes by shifting each independently;
_Specify rib height and notch thickness;
_Automated layout of the rib sections for fabrication including notches and labels;
_Visual 3D reference guide for construction;
_A "defaultGrillage" state has been saved under the "Solution" menu for quick start-up;
_A "generate_grillage_layout?" on/off toggle to allow for faster operation.
Limitations:
_The reference surface must always be shrunk;
_The grillage (for now...) is generated from a vertical extrusion downward. A surface with extreme geometry may not work well, if at all;
_If the outline of the reference surface is such that a section plane will cut the surface in two locations the automated layout will not function correctly;
_The notches are generated as rectangles with the intention that the user will want to cut the notches on a separate pass from the rib sections;
_Without any clusters, the canvas looks pretty scary. The resulting output of the definition is located all the way downstream (but should be clearly labeled).
View some screenshots from my album Gillage Making.
Download the definition file here: grillageFAB_v1.rar
Happy cutting.
-taz
All,
I put together a utility definition to create a grillage (waffle) surface for laser cutter fabrication. Please feel free to use it (at your own risk...). I plan to make improvements to this base configuration in the future.
Features:
_Specify the uniform spacing for each of two (A = above, B = below) orthographic cut planes;
_Specify the rotation (angle) of the orthographic cut planes to the reference surface;
_Fine tune the start of A or B cut planes by shifting each independently;
_Specify rib height and notch thickness;
_Automated layout of the rib sections for fabrication including notches and labels;
_Visual 3D reference guide for construction;
_A "defaultGrillage" state has been saved under the "Solution" menu for quick start-up;
_A "generate_grillage_layout?" on/off toggle to allow for faster operation.
Limitations:
_The reference surface must always be shrunk;
_The grillage (for now...) is generated from a vertical extrusion downward. A surface with extreme geometry may not work well, if at all;
_If the outline of the reference surface is such that a section plane will cut the surface in two locations the automated layout will not function correctly;
_The notches are generated as rectangles with the intention that the user will want to cut the notches on a separate pass from the rib sections;
_Without any clusters, the canvas looks pretty scary. The resulting output of the definition is located all the way downstream (but should be clearly labeled).
View some screenshots from my album Gillage Making.
Download the definition file here: grillageFAB_v1.rar
Happy cutting.
-taz
Tags: fabrication, grillage, waffle
Views: 10355
Replies to This Discussion
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Permalink Reply by Mac Ward on -
PS. I'm usually bringing these objects in as Sketchup files opened in RHino
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Permalink Reply by Mac Ward on
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okay, found it here
http://www.grasshopper3d.com/forum/topics/rib-builder-help
_Offset surface from master surface
_Duplicate border of master surface and offset surface
_Loft the border curves
_Join the surfaces
You could set up a routine to do this in GH too...
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Permalink Reply by Mac Ward on
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Just wanted to share a couple results. The chair moquette was made with the radial plugin. The stool didn't use the plugin but was inspired by this thread.
Both were routed on a 3 axis CNC table. The stool is plywood; the chair is mat board and acrylic
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Permalink Reply by taz on -
Nice projects Mac!
It looks like you do a lot of furniture work. Did you see this other table that someone posted?
mesa
One issue with plywood grillage type pieces is they end up being quite heavy. Unfortunately the use of material isn't the most efficient.
But they're fun to put together! -
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Permalink Reply by Mac Ward on
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More grillage! These are laser cut from 1/16" bass wood. I hollowed out the interior to save weight / material. A shelling function in Rhino would have helped for the interior cavity, but since there is no such feature I just winged it with a boolean.
Yes, I saw the Mesa table. It's very nice. I love how the grillage bump pierces the glass on the bottom shelf.
Wood is not such a great material for this; and the furniture lacks shear strength without any triangulation of the structure. But I really like the look of it.
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Permalink Reply by Dubravko Siskic on -
Hi Taz , first of all thank you for the beautiful definition ,
is it possible to define ribs thickens trough definition in the same way notch thickness is possible, or maybe suggestion that those two parameters are connected so when you define rib thickness automatically notch dimension is set ( maybe even with offset)
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Permalink Reply by taz on
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Hey Dubravko,
What do you need rib thickness for? For visualization?
The main intent of the definition is to produce the linework for fabrication, but since the 3d planar surfaces are there it would be easy to go into the definition and offset the surfaces to create 3d ribs with thickness.
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Permalink Reply by Matt Harrisson on -
Hey Taz,
Love the Definition, exactly what I was looking for.
I just have a question though; how can I give depth to the ribs as I want to bake them and incorporate into a model?
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Permalink Reply by taz on
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Matt,
If you go to "View > Restore Named View > output" that will take you to the end of the definition and it will look like this:
"A_3D_ribs" and "B_3D_ribs" are the planar rib surfaces. You can simply offset those surfaces to create 3d ribs with thickness.
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Permalink Reply by Matt Harrisson on
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Hi Taz,
Thanks for the quick reply, however I'm fairly new to grasshopper and I ask that you bear with my lack of knowledge. I've tried your suggestion; I used an offset component on both surfaces and the result wasn't what I was hoping for. I simply got another set of surfaces identical but displaced by my specified parameter. What I was hoping for was a solid object with thickness as if the surface had been extruded. How could I achieve this. Thanks in advance!
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Permalink Reply by taz on
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Hey Matt,
That's a good start but you'll have think through the continuation of the routine, see the following image.
You'll want to flatten the ribs first so you don't have to worry about any residual tree data structure from the definition, but enable Draw Fancy Wires (fancywires would be a great name for a GH blog by the way...) to see how tree data is helping with lofting of the surface border curves later on.
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Permalink Reply by Dubravko Siskic on
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Taz, thank you on for for the solution for ribs thickness .
I have just added JOIN CURVES after BREP WIREFRAME since curves were separated before LOFT.
Now everything is ok i have just have two errors:
and after i rotate the grillage i dont have fabrication A curves and i get this mssg:
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