The team originally planned to build the sculpture with glass fiber composite, but fire codes would have required additional engineering studies to prove it was flame retardant. Additionally, the building was going to be largely enclosed by the time the sculpture was ready for installation, making it impossible to bring the sculpture, which is 14-ft wide and more than 16-ft high, into the building in one piece.

Argent had designed the sculpture as a form composed of hundreds of flat triangles. “The piece lent itself to aluminum as long as we could figure out how to fabricate the pieces,” said Bill Kreysler, who founded the fabrication company in 1982. Working with Argent’s digital renderings, Kreysler’s team translated the design into Rhino software, creating what he calls a semi-monocoque structure with a double-skin of thin aluminum on a thin-ribbed interior aluminum frame. The decorative surface is composed of 1,446 CNC-cut triangles with side dimensions ranging from one in. to three ft. Etched with a numbering system, the triangles were placed using laser-projected grid lines.

“I think that one of the things that is often overlooked in this digital fabrication world is that there’s a sense that because computers are controlling the process, the human element is reduced, but in many ways it’s increased,” said Kreysler, who limited the number of people working on the piece to ensure consistency.

The rabbit’s interior structure was assembled into 14 pieces of varying diameters in the shop, then transported to the airport for assembly. The exterior aluminum triangles are textured with crushed glass to create a velvet-matte surface and float 1½ in. above the interior shell with aluminum standoffs.

Even in the light-filled atrium space the sculpture’s suspension system appears minimal. The concentrated loads coming from seven custom wire rope suspension cables with swage fittings are received by the rabbit’s internal steel armature. Aluminum transverse members then distribute these loads from the steel armature to the monocoque aluminum shell.

Unveiled on October 6, 2011, the new $1.3 billion airport addition is the largest construction project in Sacramento’s history. The rabbit is the centerpiece of the 14 art installations—more than $6 million worth—commissioned by the city’s Metropolitan Arts Commission and planned for completion in the coming years.

Rhino

www.rhino3d.com

3D CAD Tips

Said Cathy Lewis, VP of Global Marketing for 3D Systems, “This new site underscores our commitment to technology leadership and showcases the high value, low volume 3D printing applications that leverage our first mover advantage in this exciting shift to on-demand, rapid manufacturing.”

Check out the website here: http://production3dprinters.com/

3D Systems
www.3Dsystems.com

3D Systems acquires Alibre

Get your complete 3d printing system

3D Systems acquires Freedom of Creation

3D Systems acquires The3DStudio.com

3D Systems buys Deelip Menzes products

Another Acquisition for 3D Systems, Print3D Corp.

3D Systems acquires Accelerated Technologies Inc.

3D Systems Acquires Quickparts

3D Systems teams up with Solidvision

Bits from Bytes acquired by 3D Systems

3D Systems acquires French prototypers CEP and Protometal

3D Systems acquires Design Prototyping Technologies

Source: :: Make Parts Fast ::

3D CAD Tips

This latest version focuses on making mesh operations easier and more powerful. The SDK now includes Rapidform’s advanced rewrap, adaptive remeshing and curvature flow improvement algorithms, making mesh optimization easier.

INUS Technology has spent more than a decade creating and refining point cloud and mesh processing tools to deliver great results from any type of 3D scanner. With Rapidform.dll, third party developers can take advantage of this expertise and integrate the technology into their own apps.

New features in the SDK include:

• Mesh topology improvement tools

• Mesh editing capabilities, such as mesh Boolean operations and mesh cutting

• Advanced triangle normal repair (to fix common issues with mesh direction)

• User interface APIs for large point cloud and mesh display and selection tools

In addition to the extensive point cloud, mesh and NURBS surface capabilities found in Rapidform.dll, there is also a set of APIs for dental and prosthodontic design from 3D scan data. Developers can create custom dental CAD programs that enable prosthesis design specific to each patient.

Rapidform.dll Dental is a superset of the standard SDK that makes developing custom applications for coping, pontic, crown, bridge and custom abutment design fast and easy.

INUS Technology Inc.

www.rapidform.com

Source: :: Make Parts Fast ::

3D CAD Tips

The MaxSHOT 3D adds the accuracy and speed of photogrammetry to the range of applications already possible with Creaform technologies, especially when it comes to larger parts. It combines the MaxSHOT 3D photogrammetric video camera and the VXshot processing software.

According to product director Jean-François Larue, the software is innovative and simple to operate. The system features real-time visualization and validation of acquired data and an entirely guided step-by-step operation, it allows even those new to photogrammetry to quickly and easily generate a high accuracy positioning model of an object.”

In concrete terms, using the MaxSHOT 3D with a Handyscan 3D self-positioning scanner, a MetraSCAN optical CMM 3D scanner or a HandyPROBE arm-free CMM translates into shorter measuring time on larger parts, accelerated positioning of the device around the part and higher measurement accuracy.

Creaform
www.creaform3d.com

Source: :: Make Parts Fast ::

3D CAD Tips

“The addition of this scanner to our product line provides our customers with even more flexibility,” commented threeRivers 3D President & CEO Mike Formica. “It was developed in direct response to their request for an affordable 3D scanner specifically engineered for small parts scanning.”

It has a working volume of 4 in. x 3 in. x 3 in. and a point spacing of 80 µm, enabling it to capture very fine details. Sharing the same state-of-the-art high-speed architecture as the LC-2, the –MACRO version has a scan time of 5 seconds for a single view, a resolution of 1.2 million points and includes an automated rotary turntable for fast, easy 360 degree scanning.

Actual scan of a penny with the LC-2-MACRO scanner

An Ethernet interface makes the scanner simple to setup and configure and provides fast, reliable data transfer. It weighs less than 5 lb, and easily fits on a desktop or can be integrated into a process line; its light weight, small form factor and tripod mount make it suitable for remote scanning jobs.

threeRivers 3D, Inc.
www.3rivers3d.com

Source: :: Make Parts Fast ::

3D CAD Tips

Educators worldwide have recognized the annual design and 3D printing contest for its positive impact on students. “Students have the opportunity to put their critical thinking skills to the test, as well as to demonstrate their creativity with this design contest,” said Jesse Roitenberg, Stratasys Education Channel Manager. “Each year they demonstrate they are up to the challenge, with the unique submissions we receive.”

Dimension 3D Printing will award nine student winners either $2,500 or $1,000 scholarships in the categories of Middle School and High School Engineering, College Engineering, and Art & Architecture. Designs are awarded based on creativity, usefulness, part integrity and aesthetics. Instructors of the three first-place student winners will receive an Apple iPad for use in the classroom. Since the contest’s inception, more than $90,000 in scholarships have been awarded to students.

Each submission must:

• be a sound mechanical design

• be realistic and achievable

• include a clear written description of the design.

This year’s contest will also feature an award category in which students may compete for a bonus prize. Students who incorporate a school-spirit theme into their designs will have a chance to win a $250 gift card.

For video, photos, and descriptions of previous winning designs, visit Extreme Redesign 3D Printing Challenge. For contest rules and regulations, visit ER Rules & Regulations.

Dimension
www.dimensionprinting.com

Stratasys, Inc.
www.stratasys.com

Source: :: Make Parts Fast ::

3D CAD Tips

Marloes ten Bhömer is an acclaimed designer of provocative and otherworldly shoes. For some of her work, she uses a 3D printer from Object Ltd. Because of the multi-material printing capability of these 3D printers, she can design and manufacture her shoes to be modular so that they can be dismantled and reassembled for the purpose of replacing parts. One example is the Rapidprototypedshoe.

“My work is very much about liberating design – I use new materials and methods because this helps to break away from conventional approaches,” said Marloes ten Bhömer. “The rapid prototyping process stimulated the idea for this shoe, as the name suggests. I explored the technology and saw that rapid prototyping – adding material in layers – rather than traditional shoe manufacturing methods – could help me create something entirely new within just a few hours.”

Further research led ten Bhömer to Objet’s Connex range of multi-material 3D printing systems. “These printers make it possible to print an entire shoe – albeit a concept shoe – including a hard heel and a flexible upper in one build, which just isn’t possible with other 3D printing technologies,” stated ten Bhömer. “The shoe is printed as a single entity so the parts come off the printer already assembled, and you can still take the shoe apart later on. It is inspiring and opens up the possibility of interchangeable heels and creating custom designs. Also, the possibility of repairs allows for a more realistic product and changes the idea of rapid prototyping into rapid manufacturing.”

Designer shoes are easy to manufacture and assembly thanks to 3D printing

The Connex line of Objet 3D printers can combine rubber-like materials and rigid materials in a single prototype; they are used extensively in the footwear industry. Said Gilad Gans, executive vice president of Objet, “As an affordable alternative to factory-produced samples, the process encourages users to review more design alternatives, increasing the potential to produce a more creative or better designed concept.”

“Cost-wise it does make sense to use these printers, particularly for haute couture shoe design,” said ten Bhömer. “I can have prototypes printed in multiple materials with no expensive set-up costs and no minimum quantities. I also have great confidence in the quality of digital prototyping – with conventional shoe mould making, the heel is matched to its left or right counterpart by eye, so there’s always room for error and it can be a slow process. By making the moulds digitally you know the left and right shoes are an exact match and it’s also economical and easier to scale seven different sized pairs, as required for a commercial line of shoes, using specialist software and Objet 3D printing.”

Objet Ltd.
www.objet.com

Source: :: Make Parts Fast ::

3D CAD Tips

There are as many ways to interpret 9/11 as there are people who experienced that horrible day, whether up close or at a distance. One man’s preference is documenting Ground Zero, in painstaking detail, before the attack, after the twin towers had fallen, and today, now that the site is being rebuilt.

David Munson’s amazingly detailed three-part model “WTC Triptych” is on display at the New York City Fire Museum in Manhattan’s Soho district. With each model measuring 17 in. x 17 in., it was created on a Z Corporation 3D printer.

“There are many wonderful writings, photos and artwork that interpret 9/11,” said Munson. “I think it’s also important to document the totality of it as objectively, realistically, and completely as possible, with a minimum of poetic license and a devotion to detail, on a scale the average person can absorb. These are my strengths, and this is my small contribution to ensuring people never forget.”

Munson, with a background in producing construction documents, owns the Munson3D.com architectural visualization company, and is a specialist in precise, complex representation. He drew from numerous data sources to create “WTC Triptych,” including 2D satellite imagery, Google Earth, photographs (personal and downloaded from the Internet), publicly available 3D models and Wikipedia, among others. He used Autodesk 3dsMax Design computer-aided design software as well as AutoCAD, Google SketchUp, and Adobe Photoshop as auxiliary programs.

“The data was not from one particular source but was cross-checked against multiple sources,” he said. “So I could cross-check a graphics source with http://skyscraperpage.com/, for example, or simply go to Wikipedia to find the numerical height of a building. Also, 3dsMax Design let me extract 3D information from flat photographs as long as there were enough ‘known’ points. So, I used photos for more than just applying textures on the models. There is no simple way to describe this process other than to say it is very precise for the scale.”

Though extremely labor intensive, gathering the data was only the beginning. The data was then used to create an accurate physical representation. “There is only one way to do it,” said Munson. “I needed the ZPrinter®, which not only accommodates large sizes but, because of its unique color capability, is the only way to accurately reproduce the highly detailed texture mapping used in these computer models. This process creates a whole new medium for city planning, and I hope this exhibit illustrates its potential value to a larger audience.”

Z Corporation
www.zcorp.com

Source: :: Make Parts Fast ::

3D CAD Tips

Said Cathy Lewis, VP of Global Marketing for 3D Systems, “This new site underscores our commitment to technology leadership and showcases the high value, low volume 3D printing applications that leverage our first mover advantage in this exciting shift to on-demand, rapid manufacturing.”

Check out the website here: http://production3dprinters.com/

3D Systems
www.3Dsystems.com

3D Systems acquires Alibre

Get your complete 3d printing system

3D Systems acquires Freedom of Creation

3D Systems acquires The3DStudio.com

3D Systems buys Deelip Menzes products

Another Acquisition for 3D Systems, Print3D Corp.

3D Systems acquires Accelerated Technologies Inc.

3D Systems Acquires Quickparts

3D Systems teams up with Solidvision

Bits from Bytes acquired by 3D Systems

3D Systems acquires French prototypers CEP and Protometal

3D Systems acquires Design Prototyping Technologies

Source: :: Make Parts Fast ::

3D CAD Tips

This study offers an unbiased, expert opinion on software used to create parametric CAD models from 3D scans.

 Rapidform XOR was released in 2006.

The U.S. Air Force frequently needs to regenerate designs of decades-old parts, and so commissioned the University of Oklahoma to study both 3D scanning software and hardware to determine the best available technology. INUS Technology had no knowledge of the study or its outcome until it was published in CAD and Applications. 

Dr. Chang and his students surveyed the landscape of software available for converting 3D scans into parametric solid models usable in CAD, evaluated and then tested the front runners using practical examples. “We used five different examples in two rounds of testing,” said Dr. Chang. “The first round was surface modeling, and in the second round, we focused on parametric solid building. We found that Rapidform was the only viable option that supported support parametric modeling and transferring the solid model to CAD systems. When we say ‘viable option,’ it’s based on two things. One is the time and effort, the other is the accuracy.”

According to Chang, other software “was able to generate a parametric solid model, but it took a long time and the solid model created was not very accurate.”

“It’s very rewarding to see an unbiased study recognizing the value of Rapidform XOR compared to other 3D scanning software,” noted Calvin Hur, INUS Technology’s CEO. “We encourage anyone considering 3D scanning technology to read this paper to make a decision on their reverse engineering software solution.”
 
The entire paper, including technical details of each tested software, is available for free download at http://www.rapidform.com/reverse-engineering-study.

INUS Technology Inc.

www.rapidform.com


Source: :: Make Parts Fast ::

3D CAD Tips