Showing posts with label SLS. Show all posts
Showing posts with label SLS. Show all posts

Thursday, December 4, 2014

Charles Darwin Shapeways prints

This image above shows Charles Darwin printed as a 1 inch tall, nickel steel charm or pendant. As you can see, it's scarcely taller than a quarter. It is considerably grainier and more striated then the Shapeways renderings would suggest but, I have to admit that I love the effect. It seems more distressed and ancient than something fresh out of the 3d printer. In certain instances the striations mimic the hatch work in old engravings. When the 3d print arrived, it was quite a bit duller and darker as well. A few minutes of nylon brush and cotton wheel on the old Dremel tool brought the shine up in a jiffy while leaving the darker oxides in the deepest details. This piece is currently available at this link for under $30.
Shapeways is an online 3d printing service that prints in a variety of different plastics, metals and ceramic. The plastic prints are either SLA or SLS products depending upon the particular plastic. Most of the metal prints are actually printed in wax and investment plaster molded. The wax gets melted out of the plaster and is replaced with molten bronze. Once the bronze cools, the plaster is then broken off and the bronze may be hand finished.
Typically making a traditional or historical bust, an armature is first constructed, clay is applied and modeled, a silicone mold is built, the bust gets cast in wax, the wax is then refined and re-molded for bronze casting. It's a lot of steps and a lot of time. At the end of that laborious process you are left with one bronze in one size. This bust was sculpted in Zbrush, no armatures, no clay, no molds or casts. The different sizes are rather easily achieved by reprocessing the mesh to the desired dimensions. It's not quite as simple as just scaling it up or down. Consideration must be given to proper wall thicknesses. For instance,  the proportional wall thickness of the life sized head would be much too thin in much smaller variants. Conversely, the proportional wall thickness of the smaller variants once enlarged, without reprocessing would result in a needless use of additional material and expense. Fortunately Shapeways runs the mesh through it's own digital test and will alert you if the mesh needs modification in order to ensure the durability and success of the print.
The price range is nearly as astonishing as the available range of materials. A one inch tall head or bust in matte polished nylon can be printed on demand for as little as $5.25 or, for as much as $2,600.60 in platinum. My favorite finish is the premium silver for $130.31 but, the polished nickel steel is nearly as handsome and $100.00 less. An 18k gold version can be printed for $1,314.56 but a gold plated brass copy can be had for as little as $75.00. On the other side of the size spectrum, a life sized head can be printed for as little as $1,200.00 in polished nylon or, $8,986.66 in bronze. That may seem pricey to those unfamiliar with the costs of sculpting and casting an original portrait but, in truth it's never been more efficient or cost effective. While Charles Darwin may not be everybody's choice for an ear ring, charm or, pendant, anybody's portrait or head could be processed in this way.
Any loved one or, lover or, spouse or, child, anyone near, dear or, important to you can be commemorated and or celebrated in this medium. Beyond that personal but, miniature scope, The Darwin bust or head, especially in it's largest configurations would serve the collections and displays of any museum, library, school, office, scholar or, evolutionary biologist's study very well indeed.
Why Charles Darwin? He's a key hero in my pantheon of the greatest human beings whom have so rarely graced this planet's face. As a thinker he alone marks the begining of the begining with greater clarity, reason and rational resolve than any who came before him. His founding observations are the shoulders upon which all biological life sciences now stand.
While $127.90 may seem to many as a preposterous price for a 6" plastic Christmas ornament, it's actually peanuts for producing an on demand rapid prototype of an original sculpture. Besides, has there ever been a more serious looking Santa?

On a final note I must mention that while all of these images appear to be photographs, they are in fact based on renderings generated through Shapeways. Before making a purchase, I strongly suggest studying Shapeways site so that you may fully acquaint yourself with their products, methods and actual photographs of pieces in different materials that have been produced by them.

Wednesday, November 26, 2014

Sleigh and Reindeer for the 2014 Macy's Christmas Windows

5 Santa sleighs, 3 different sizes, 40 reindeer in assorted poses and scales for 5 of the 6 Macy's fabulous Christmas windows this year. I've been responsible for sculpting featured elements in these famous windows a number of times in the past. All of those elements were resin coated carved foam or solid cast resin. This project was a radical departure from those methods and materials. All of my sculpting duties in this were performed in front of my computer with Zbrush. For those unfamiliar, Zbrush is a state of the art modeling and texturing program originally developed for the movie and gaming industries. Virtually any shape can be created in it and, any virtual shapes can be made actual through 3d printing and robotic carving.
In the not so distant past, a project like this would require so many armatures and clay and tooling and resin and silicone and mold jackets and more resin and time and fingers absolutely sanded down to opened wounds. This was not that case. In this, everything was sculpted in virtual space. Different sizes and scales were simply achieved by rescaling the stereo lithography file (.stl).
The objects featured in this post (all shot with my Iphone!) didn't quite pop out of the printers the way that you see them here. Many components needed to be printed and assembled in parts and pieces and all of it was meticulously hand finished and beautifully hand painted by the talented art staff at Standard Transmission.
In the image below, Santa's reindeer seem to become smaller in perspective because they actually are smaller in reality. Descending scale is the oldest trick in the diminishing, forced perspective playbook. In the good old days this effect would require sculpting, molding and casting each reindeer individually. So gladly, this is no longer the case.

In it's largest example, the Santa's sleigh is about 3 and a half feet long. In Macy's Mars window, the sleigh sans runners is mounted on an actual radio controlled toy car chassis. On the other side of this CAD CAM (computer aided design/computer aided manufacturing) spectrum, with not much further development to the model, a life size or larger version could easily be carved by robots in rigid foams, of various densities. This is a very similar method to how the automotive and most transportational industries develop their vehicles. Considering all of that, it is easy to guess that this design and manufacturing technology will eventually make a leap from these wondrous Christmas windows into the Parade Studio. If that should come to be the case, floats and balloons would be sculpted in virtual space. Their components and pieces would be robotically carved or 3d printed on demand. Not only could full size floats and their myriad satellite components such as clown cars and push floats be created in this manner, window sized miniatures could be as well. In seemingly magical instances this would merge the Macy's Thanksgiving Day Parade and it's Christmas windows seamlessly. If Macy's renowned helium inflatables were designed this way, models could be printed in a staggering array of different materials and sizes as all of them are rather simple in terms of their shapes compared to the complex constructs of the the floats. Certain balloon models could actually be printed a couple of inches tall in a durable toy plastic. It would be a lovely thing for a client to hold in their hand while pondering their venerable venture. For not an unreasonable amount more, they could be printed in full color and in mass wherein all concerned parties in the design and production process have an actual full color miniature reproduction of the balloon. The communication issues that would be so well addressed by such objects doesn't need explaining.
  Recently I've been exploring metallic printing. Employing this process will allow me to recreate models in assorted metals ranging the gamut from stainless steel to platinum, with gold, sterling, bronze, and brass in between. The parade has an enormous fan base. Year after year, more than 3 million folks line New York City streets to be thrilled by the parade's unparalleled spectacle and grandior. Another 50 million people glue themselves to their television sets, transfixed by hours of NBC's award winning coverage of the parade. How many of those 53 million mentioned would love to have a gold or polished sterling silver pendant, charm or ear ring of their favorite balloon or float ranging from let's say $100 to $200? The amazing thing about this is that as the files are essentially derived from the original model, not only is it a proportionally perfect reproduction of the balloon, it could be put into jewelry production with almost no additional development costs. Further, as this is a process of printing on demand, the risk of over stocking a particular item that doesn't sell as well as another is greatly diminished and in terms of online shopping, no more pieces than are ordered would ever be produced.
Perhaps one of the greatest advantages of sculpting in the computer is the aspect of pre-visualization. All of the rendering are simply assembled screenshots of the model. At any point in the sculpture's development, such illustrations can be created in a few clicks, brought into Photoshop for assembly and adjustment and emailed to the client for approval. In instances where visual information is needed more immediately, I'll simply take a shot of my computer screen with my Iphone and text it to the client. If a client needs more information than the 3d renderings can offer, animated turn table movies can easily be provided as well.

The illustration below shows the model in whole and in cross section with all of it's parts and subtools integrated into a single watertight mesh for 3d printing.
At an earlier point in the project's development a different rover design had been proposed but, was deemed rightly too complicated to animate each wheel independently. Though it wasn't used, I'm still quite proud of this model. The chassis floats on 6 swing arms with 12 pivot points, much in the manner of a marionette. It would also have required 6 individually wired motors and very precise mechanical mounting interfaces between the wheel and the hubs.