RTC09 2.2.4 Revit and Digital Fabrication - Danelle Briscoe

8/3/2019 RTC09 2.2.4 Revit and Digital Fabrication - Danelle Briscoe

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Revit + Digital Fabrication

Danelle Briscoe

Unitec New Zealand School of Architecture

SpeakerLogo

Digital vs Analog design background

Types of Digital Fabrication tools/techniques

Case study Architectural project Tropical House

Exporting from Revit 2008/2009 for 3D Printing

Examples of 3D Printing


Outline


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Methodologies for using both


Digital vs Analogue

Computer-Aided Design to Computer-Aided Manufacturing

BIM model goes straight to

manufacturer


CAD/CAM


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Computer Numerical Control

Subtractive fabrication


CNC Milling

Additive Rapid-Prototyping

Stereo-lithography


3D Printing


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Additive Rapid Proto-typing

Powder sintering


3D Printing


Fused Deposition


3D Printing


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Fused Deposition

-model shows how a 3D

Print can emphasize

different aspects of design

by turning off components

like windows.


3D Printing

Additive full scale concrete printing

Dr. Behrokh Khoshnevis

Contour Crafting


3D Printing


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Registration of physical model/form to be imported into Revit


3D scanner

2D cut profiles

from digital files

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Laser Cutter


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Water Jet

Project in Barbados, West Indies

-utilizes Revit with

some digital fabrication

design techniques


Tropical House


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Laser cut models

Allows you to cut

Multiple model bases

Quickly to test different

Schemes.


Tropical House

Laser-cut site models

Show detail from 2D

Files that might typically

Get discarded or forgotten


Tropical House


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Larger scaled site model

-Same 2D CAD files used

To cut another base model

at a different scale in order

To design more detail.


Tropical House

Laser cut building model

Floor plan files exported to AutoCAD

To be set up for laser cutting and then

manual assemblage


Tropical House


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3D Printing house design

BIM model is exported to AutoCAD

In order to 3D print with powder-sintering

And stereo-lithography


Tropical House

3D Prints techniques: powder sinter vs. stereolithography

Opaque vs

translucent


Tropical House


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3D print using Stereolithography

Showing signs of sun damage

And warpage after 1 year.

Columns printed at 1mm

Thickness are bending.

Scratches were made to the

model itself from fabricators

Clean-up technique


Tropical House

Pre-cast Hollow core panel

Intended to be a Full-scale print of house


Tropical House


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To transfer Revit files to STL:

1. Export your file under DWG


3D Printing

2. Revit will prompt you to

default window where you

can save file as an as an ASCII file.


3D Printing Revit 2008


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3. That exported ASCII file can

then be inserted and manipulated

(i.e. scaled down) in AutoCAD



4. Once you have manipulated

your model for 1:1 printing

(i.e. checking scale and minimum

dimensions of pieces), you can

EXPORT the file as an STL file

by changing the Files of typetab to Lithography (*.stl).




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Install + Exporting from Revit

Run STLExporterForRevit2009.exe

Follow instructions in the installation dialog box

You will be prompted to select which Revit verticals to install the Add-in for. Selectthe check box for each version that you want the add-in to run in and select Next.

Continue following the installation instructions.

The STL Exporter Add-in will be installed for Revit 2009 products



Preparing the Model for Export:

Open a Revit project

Open a 3D view of the model

The STL Exporter is designed to print everything that is visible in the 3D view. Sothe most important thing to do before exporting the model is to simplify the model

so only the important things that interest you are printed. Start by hiding all theelements that you do not want to print:

Set view detail level based on the quality of the print that you want. Normally thatwould probably be Coarse or Medium. (found at the bottom of the view window)



*NOTE: There is currently a known issue with thesetting detail level that may render it ineffectivefor some elements.


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Preparing the Model for Export (cont.):

Use the Visibility/Graphics dialog under the View menu to excluded categories ofelements in the STL file. Hide items like furniture/fixtures be hidden beforeexporting.

Use Hide in the view for any components that you want excluded in the STL file .

In cases where stairs, railing, banisters, windows, doors, columns, beams, walls,floors and roofs are too thin or small for the scale that you are printing at, you willwant to either hide the elements or replace them with thicker elements so they willprint properly.



Exporting the Model:

Click Tools > External Tools > Export STL

Click Binary or ASCII format.

Click Save; pick a folder and file name

NOTE: There is no control on the accuracy of the approximation (e.g. angular andchordal deviation). The STL model accuracy is identical to that of the displayed.




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Preparing the Model for 3D Printing:

A number of things may need to be done after the STL file has been created toinsure a high quality 3D print.

Use an STL viewer to check for any errors in the model and try to resolve anyerrors.

Shrink-wrap the model if you are interested in just the exterior and then coreout/hollow out the interior to reduce the amount of material required to print themodel.

Remove any elements that you do not want to print

Thicken or remove any objects that are too thin to print or have no thickness. Inmost cases that will be approximately 1-2mm at the printing scale. Theseelements may include: stairs, railing, banisters, windows, doors, columns, beams,walls, floors and roofs.



Curving curtain wall

Sang Hee Park uses Sketchup file

to first model project and then imports

Into Revit for 3D print and documentation


Beauty + the BIM


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Curving curtain wall

Sang Hee Park

-model detail


Beauty + the BIM

Brick Module

Luciano Velocci


Beauty + the BIM


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Blending Symbols

Boaz Du


Beauty + the BIM

Blending Symbols

Boaz Du


Beauty + the BIM


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Building as Land

Zayd Ali- uses toposurface

Feature to model conceptual

Proposal.


Beauty + the BIM


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Hairy Architecture

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Beauty + the BIM

Danelle Briscoe

Questions

RTC09 2.2.4 Revit and Digital Fabrication - Danelle Briscoe

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