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: 5550
Replies to This Discussion
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Permalink Reply by taz on -
Dubravko,
It's hard to say what the problem is without your surface file.
The first error you're getting looks normal until the "Generate grillage" input is toggled. The second error I'm not sure about, but sometimes GH will freak-out and throw errors if there is too much information to process.
You may need to start afresh and relink your grillage object to make things work correctly. Set-up your final grid spacing and rotation before you make the secondary connections so GH doesn't have to process as much information.
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Permalink Reply by Matt Harrisson on -
Hey Taz,
I tried out the addition to the definition in your last reply. This seems to work very well for solids and splitting them into ribs with thickness. What I wanted to create were ribs from a non-closed surface. The reason for this is to create a curved roof structure for visualisation in MAX similar to Alvaro Siza's serpentine pavillion:
Do you think this is possible with the definition?
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Permalink Reply by Matt Harrisson on
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Hey Taz,
Thought you might be interested, I had some limited success with preparing ribs for visualisation. I exported IGES to MAX and shelled the model. See the images below.
I keep getting this problem though of some ribs coming as as these unsightly planes, I'm sure it's a simple error I've made. I'd love to hear your suggestions.
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Permalink Reply by taz on
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It looks like in your conversion to IGES you are losing some of the trim information for the NURBS surfaces that create the ribs.
You can see that the planes you're getting are the NURBS surfaces from which the rib shapes are trimmed. Somehow untrimmed portions of your surfaces are showing up.
I think the only surefire thing you can do is import the rib border curves (just use DupBorder in Rhino) and then recreate or retrim any NURBS surfaces in MAX that are giving you trouble.
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Permalink Reply by taz on
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Hmm... The actual pavillion structure is made of many small pieces with mortise and tenon joints and some bolted connections. This is different than notching the members.
Still, I would think you could replicate the grid character if you take the pavillion shape and split it up into separate pieces for the roof and each side. It would take some work to make everything match but it should be possible.
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Permalink Reply by Matt Harrisson on
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The model doesn't have to replicate the construction of offset members in the actual building, just to, as you say, replicate the character and skeletal form. I'm still having issues with exporting to max though without strange results. Ah well, I shall keep trying!
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Permalink Reply by taz on
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Good luck to you. This is a better description of what I was saying about the overall form - multiple pieces...
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Permalink Reply by Matt Harrisson on
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Great example, Thanks! I don't seem to see your replies on here unless I click the link in my email. Must be a cache issue or something. I will try your suggestion of recreating the NURBS in MAX. I appreciate I'm trying to do something other than the definition was designed for and I will need to do some tweaking. I'm looking forward to using the definition for fabrication though as I've often wondered how to fabricate double curved surfaces, and now it's a breeze!
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Permalink Reply by ersa mayori on -
Hi, Matt
did you find out how to create this Serpentine Gallery Pavilion by using grasshopper?
Actually I use this project as my precedence too. But I don't know how to script the zigzag structure and the connection of each element.
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Permalink Reply by Dubravko Siskic on -
Hi Taz with a little bit of tweaking your definition i have fabricated this little table.
Thank you for sharing the definition.
You can see the fabrication process at my page www.amati.com/stol
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Permalink Reply by Nicholas Proia Cecchi on -
Taz,
I am really interested in checkin gout your definition and comparing it to one I have written recently, however all of the links are broken - can you post up a new .ghx or .rar file please?
Your gallery looks great, I'd like to start working with this.
thanks,
nick
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Permalink Reply by zhoujie zhang on -
GREAT
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