3D Printed Molds Save Time and Money for Specialty Lighting Company

Western Technology is a manufacturer of specialty lighting solutions that cater to a variety of highly specialized industries such as aviation, oil and gas, and maritime.  Their products are used in a variety of environments making it important that the design is both versatile and functional.

In their Utah office, they have been successfully utilizing a Stratasys PolyJet 3D Printer to create polyurethane molds.  By using 3D printed molds, they have been able to save both time and money over traditional manufacturing methods.

Western Technology’s 3D Printed Toggle Mold

 “Below is a pictorial of how we’ve used our new 3D printer to develop and create polyurethane parts. The parts we are producing in this mold are used to trigger a magnetic sensor inside a sealed aluminum box. Each part has a magnet and aluminum insert cast inside.” Lyal Christensen at Western Technology

The mold was printed using a Stratasys Objet 500 Connex 1 printer in a Vero Blue material (standard plastic).  This is the final result after support material has been removed.

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The mold is comprised of two halves that each have 3 different parts to create this Polyurethane mold.  Below one side is shown in an un-assembled view.

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Steel pins are press fit into the 3D printed part with ease to help with locating the magnets in the correct location.  Also you can see that the part has a gloss finish to it.  The parts were printed in the glossy mode which helps in minimizing the amount of support material needed to print the parts.

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Inserts and Magnets are added to the mold along with a Urethane mold release agent.  The Aluminum inserts are held in the right place by screws that keep the inserts suspended so that the Urethane can engulf all sides of it.

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The clamped mold then has the Urethane fed into it which is poured at room temperature.  Once all of the cavities are filled, the mold is left to cure at room temperature for just under one hour.  Using this technique, they are able to complete 6 or 7 sets per day.

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The following morning the screws and the insert bridge are removed.

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The mold is pried apart using a flathead screwdriver at specific cutout locations that were printed into the mold.  With a simple turn of the wrist, this mold is easily separated.

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There is a little bit of flash which can easily be removed.  These parts are almost ready for the customer.

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The parts are cut away and are ready for de-flashing and finishing.

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At Western Technology, Lyal estimates this mold would have cost $2,000+ to manufacture in just man hours.  They were able to get 400+ parts out of this mold and are still using it.

If you would like to learn more about how to implement 3D Printing into your processes to save time and money, contact us at sales@padtinc.com.

Simulation Driven Product Development with Free Form Fabrication

am-topo-prezo-titleJoining Two of PADT’s Favorite Things: Simulation and 3D Printing

Recent advances in Additive Manufacturing (3D Printing) have removed barriers to manufacturing certain geometry because of constraints in traditional manufacturing methods. Although you can make almost any shape, how do you figure out what shape to make. Using ANSYS products you can apply topological optimization to come up with a free-form shape that best meets your needs, and that can be made with Additive Manufacturing.

A few months ago we presented some background information on how to drive the design of this type of part using ANSYS tools to a few of our customers.  It was a well received so we cleaned it up a bit (no guarantee there all the typos are gone) and recorded the presentation.  Here it is on YouTube

Let us know what you think and if you have any questions or comments, please contact us.

Selective Laser Sintering (SLS) Additive Manufacturing Service is Back on Line at PADT

sls-sinterstation-padt-2Everyone needs a vacation. After over 15 years of service our Sinterstation 2500Plus needed some facility upgrades  and machine updates. That work is now done and our SLS system is back up and running and better than ever, producing parts for customers who have come to count on its unique capabilities.

sls-housing-bracket-1Selective Laser Sintering (SLS) is a process that uses a high power laser to fuse a bed of powdered material together, sintering the loose powder into solid geometry. It is one of the more mature and robust 3D Printing processes available and is especially well suited for making large strong parts.

We currently run Nylon 11 and Glass Filled Nylon 12 in our machine which has a build volume of 13″ x 11″ x 16.5″ and a layer thickness of 0.004″

sls-sinterstation-cleaning-padt-1Few service providers have as much experience as PADT with this system, we have been using it for over 15 years. During that time we have upgraded almost every component and during the recent downtime, the system was fully calibrated and tuned for maximum precision and performance. We are also experts on how to post process the parts that come out of this machine, including painting and other coatings.

Just a Part of 3D Printing at PADT

PADT features 3D Printing services using Stratasys FDM and PolyJet technologies, making precision parts with a wide variety of materials and colors. We also offer Stereolithography (SLA) Additive Manufacturing services along with soft tooling and injection molding consulting.

 

Demo-Room-Pic-1If you are using a big impersonal 3D Printing “mill” or are not sure where to get your 3D Printing done, reach out to PADT. We have been doing it since 1994 and have hundreds of happy and loyal customers.

email: rp@padtinc.com

call: 480.813.4884

or visit our Rapid Prototyping Services pages at:

www.padtinc/com/rp

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Do you have an Internet of Things Strategy? PADT Can Help

thing-1-250w“It is not just a trend, it is a Tsunami. One day you will wake up and see a giant wave headed your way, and that wave will be the Internet of Things!”

This was the opening line from a presentation given by the VP of sales for a major engineering software company. It got my attention because it wasn’t hype or hyperbole.  He was just pointing out the obvious. Over the past two years the signs have been there. Smart devices will connected to the internet, and older devices will be made smart and then connected. Those that don’t, will no longer be competitive.

It is not all about smart thermostats. Far from it.  I went to IoT world in San Jose last week and saw a lot of people scrambling to find their solution. And a few that found them.  The best example was an older letter stamping machine, you can guess at the manufacturer, that plugged a modular device from Electric Imp in to their controller and boom – they were connected.  Some back end programming and they now had a competitive IoT device.

iot-networ-graphic-1 It is time to define and execute on your IoT strategy

When we visit customers, we will often ask them what their IoT Strategy is.  The answers vary from “we don’t really think our products have an IoT play” to existing products on the market.  The focus in the media is on consumer IoT products, but the bigger push right now is for industrial Internet, where machines used in manufacturing, energy generation, raw material extraction, and processing are smart and connected.

Customers from consumers to other companies will be requiring the benefits of IoT devices as they look to replace older hardware.  That is why every company that makes physical products needs to develop an IoT strategy.

PADT Can Help

We have been helping our customers define and implement their approach to IoT well, since before it was called the Internet of Things.  From assisting semiconductor companies that make MEMS sensors to making smart medical devices we are plugged in to what is needed to make IoT work.

iot-landing-page-padt-1A good place to start is our IoT landing page at:

www.padtinc.com/iot

There you can find some basic information about how PADT is a more comprehensive and technically capable solution then most design houses that claim to have IoT solutions.  We are uniquely qualified to make sure the “Thing” in your IoT strategy is designed and manufactured right.

pbj-phoenix-business-journal-logoWe also published a series of articles in the Phoenix Business Journal that provide some fundamental background information on the Internet of Things and how to deal with the challenges it presents:

ansys-iot-wheelSimulation can play a big role in almost every aspect of making your IoT device development faster and more productive.  PADT uses ANSYS, Inc.’s comprehensive Multiphysics simulation tool set to model everything from the chip to the embedded system software.

We highly recommend this white paper, “Engineering the Internet of Things

We also have a recording of a very popular webinar that we did: “Engineering the Internet of Things Devices with ANSYS Simulation

and this video on how ANSYS can drive your IoT Design:

For detailed examples, check out the ANSYS IoT Landing page to get a feel for why so many companies are driving their design with ANSYS simulation software:  www.ansys.com/iot

PADT-Webinar-Logo

Engineering the Internet of Things Devices with ANSYS Simulation

June 21, 2016 (Tue)
1:00 PM AZ & PDT / 2:00 pm MDT

REGISTER

Make sure you subscribe to PADT’s email list so you don’t miss future Events

Talking is the Best Approach

We hope that you find all of the material above, and the information we will provide in the coming months useful. But they are no substitute for giving us a call or sending us an email and setting up a face-to-face to talk about your IoT strategy and device development needs.  If you are doing the work in-house, we have the hardware and software tools you need to be successful. If you need outside help, you won’t find engineers with more applicable experience.

Give us a call at 1-800-293-PADT or email info@padtinc.com.

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Spinning Gears: 3D Printing Awards for 2016 AZ SciTech Festival Sponsors

SciTech-Festival-Award-2016-2For several years now PADT has 3D Printed special thank you awards for the fantastic companies that sponsor the Arizona SciTech Festival.  This year we decided to stick with the color of the Stratasys Connex3 but add some moving parts. This gear design spins around and was made as one part, we just wash the support material out of the gaps between parts.

This is a great example of going directly from a CAD model to a custom part.  Each award has the recipient’s name printed on the smaller gear.  Everything was designed in an hour or so and it took about another hour to add in the 30 or so names.  We think these may be the best awards we have made so far.

SciTech-Festival-Award-2016-1

SciTech-Festival-Award-2016-3

Here is a video showing off how they spin:

Awards are kind of simple and fun. But the same technology is applied by PADT to help our customers design and build better medical devices, rockets, aircraft engines, computers, and pretty much any physical product you can think of.  Give us a call at 1-800-293-PADT or email info@padtinc.com to see how “We Make Innovation Work”

Unexpected Joys at Rapid 2016

While much has been (justifiably) written about HP and XJet releasing new, potentially game-changing products at RAPID 2016, I wanted to write this post about some of the smaller, unexpected joys that I discovered. If I sound overly enthusiastic about the people and companies behind them, it is likely due to the fact that I wrote this on the flight back, staring out at the clouds and reflecting on what had been a wonderful trip: I own no locks, stocks or barrels in any of these companies.

1. Essentium Materials – Carbon Nanotubes and Microwaves to improve FDM mechanical properties
Over the past year, I have studied, written and made presentations about the challenges of developing models for describing Fused Deposition Modeling (FDM) given their complex and part-specific meso-structure. And while I worked on developing analytical and numerical techniques for extracting the best performance from parts in the presence of significant anisotropy, the team at Essentium has developed a process to coat FDM filaments with Carbon nanotubes and extrude them in the presence of microwave radiation. In the limited data they showed for test specimens constructed of unidirectional tool-paths, they demonstrated significant reduction in anisotropy and increase in strength for PLA. What I liked most about their work is how they are developing  this solution on a foundation of understanding the contributions of both the meso-structure and inter-filament strength to overall part performance. Essentium was awarded the “RAPID Innovations award”, first among the 27 exhibitors that competed and are, in my opinion, addressing an important problem that is holding back greater expansion of FDM as a process in the production space.
Website: http://essentiummaterials.com/

2. Hyrel 3D – Maker meets Researcher meets The-Kid-in-All-of-Us
I only heard of Hyrel 3D a few days prior to RAPID, but neglected to verify if they were exhibiting at RAPID and was pleasantly surprised to see them there. Consider the options this 3D printer has that you would be hard pressed to find in several 3D printers combined: variable extrusion head temperatures (room temp to 450 C), sterile head options for biological materials, a 6W laser (yes, a laser), spindle tools, quad head dispensing with individual flow control and UV crosslinking options. Read that again slowly. This is true multiple degree-of-freedom material manipulation. What makes their products even more compelling is the direct involvement of the team and the community they are building up over time, particularly in academia, across the world, and the passion with which they engage their technology and its users.
Website: http://www.hyrel3d.com/

3. Technic-Print: New Chemistry for Improved FDM Support Removal
If you manufacture FDM parts with soluble supports, keep reading. A chemist at Technic Inc. has developed a new solution that is claimed to be 400% faster than the current Sodium-Hydroxide solution we use to dissolve parts. Additionally, the solution is cited as being cleaner on the tank, leaving no residue, has a color indicator that changes the solution’s color from blue to clear. And finally, through an additional agent, the dissolved support material can be reclaimed as a clump and removed from the solution, leaving behind a solution that has a pH less than 9. Since PADT manufactures one of the most popular machines that are used to dissolve these supports that unbeknown to us, were used in the testing and development of the new solution, we had an enriching conversation with the lead chemist behind the solution. I was left wondering about the fundamental chemistry behind color changing, dissolution rates for supports and the reclaiming of support – and how these different features were optimized together to develop a usable end-solution.
Website: http://www.technic.com/techni-print-lp

 

4. Project Pan: Computationally Efficient Metal Powder Bed Fusion Simulation
I presented a literature review at AMUG (another Additive Manufacturing conference) last month, on the simulation of the laser-based powder bed fusion. At the time, I thought I had captured all the key players between the work being done at Lawrence Livermore National Labs by Wayne King’s group, the work of Brent Stucker at 3DSIM and the many academics using mostly commercially available software (mostly ANSYS) to simulate this problem. I learned at RAPID that I had neglected to include a company called “Project Pan” in my review. This team emerged from Prof. Pan Michaleris’s academic work. In 2012, he started a company that was acquired by Autodesk two months ago. In a series of 3 presentations at RAPID, Pan’s team demonstrated their simulation techniques (at a very high level) along with experimental validation work they had done with GE, Honeywell and others through America Makes and other efforts. What was most impressive about their work was both the speed of their computations and the fact that this team actually had complex part experimental validations to back up their simulation work. What most users of the powder bed fusion need is information on temperatures, stresses and distortion – and within time frames of a few hours ideally. It seems to me that Pan and his team took an approach that delivers exactly that information and little else using different numerical methods listed on their site (novel Hex8 elements, an element activation method and intelligent mesh refinement) that were likely developed by Pan over the years in his academic career and found the perfect application, first in welding simulation and then in the powder bed fusion process. With the recent Autodesk acquisition, it will be interesting to see how this rolls out commercially. Details of some of the numerical techniques used in the code can be found at their website, along with a list of related publications.

Website: http://pancomputing.com/

5. FDA Participation: Regulating through education and partnership
On a different note from the above, I was pleasantly surprised by the presence of the FDA, represented by Matthew Di Prima, PhD. He taught part of a workshop I attended on the first day, took the time to talk to everyone who had an interest and also gave a talk of his own in the conference sessions, describing the details of the recently released draft guidance from the FDA on 3D printing in medical applications. It was good to connect the regulatory agency to a person who clearly has the passion, knowledge, intelligence and commitment to make a difference in the Additive Manufacturing medical community. Yes, the barriers to entry in this space are high (ISO certifications, QSR systems, 510(k) & Pre-Market Approvals) but it seems clear that the FDA, at least as represented by Dr. Di Prima, are doing their best to be a transparent and willing partner.
Website: http://www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/3DPrintingofMedicalDevices/default.htm

What really makes a trip to a conference like RAPID worth it are the new ideas, connections and possibilities you come away with that you may not stumble upon during your day job – and on that account, RAPID 2016 did not disappoint. As a line in one of my favorite song’s goes:

“We’ll never know, unless we grow.
There’s too much world outside the door.”
– Fran Healy (Travis, “Turn”).

Live Webinar: Stratasys and Aerospace Manufacturing & Design

stratasys-SSYS-TYPEMARK-rgb-400x

Next week, Stratasys will be hosting a live webinar with Aerospace Manufacturing and Design.  Hear from drone manufacturer Monarch about the competitive advantages they have gained by using Stratasys 3D Printing in their design process.

Register Here

Monarch is a drone manufacturer who uses 3D printing to provide a wide range of application-focused drone services for the agriculture, energy and land survey industries.  Building these drones with the use of 3D printing gives them the ability to produce a wide range of drones for specialized applications and build custom drones in a short period of time, giving them a tremendous advantage over the competition.  Monarch chose the Stratasys Fortus 400mc 3D printer because of its ability to build large parts that are strong and rugged enough to fly their drones.  They have taken advantage of these capabilities to design and build drones for special applications that include inspecting crops, wind turbines and solar panels, aerial surveying, accident and crime scene mapping, historical building documentation and many others.

When: May 25th at 1:00pm EST

Register Here

Webinar on the new Stratasys J750 The first ever, full-color, multi- material 3D Printer

J750 Shoes 3

REGISTER 

Stratasys recently released the most advanced PolyJet 3D Printer on the market.  The Stratasys J750 promises to be a game changer by printing complex parts with diverse properties quickly while minimizing post processing time.  We invite you to join us for a webinar to learn more about this amazing technology.

Realistic Prototypes

The J750 provides true, full-color capability. The color range is possible because with the J750, you can choose between 5 different colors: cyan, magenta, yellow, black and white allowing the J750 to achieve a broad color spectrum.

Color textures and gradients are also possible now allowing for a variety of realistic patters like wood grain, plaid or even photographs and illustrations.

Full color is also now able to be combined with a variety of material characteristics such as a range of transparencies and durometers.  All of this variety can now be done in a single print.

Register now and learn how to create stunning prototypes quickly and efficiently with full color realism.

Half Head

Versatile

The J750 not only produces incredibly realistic models, it is also capable of creating thousands of colors, translucencies and durometers simply by combining base resins right on the build tray.  The versatility provided by the J750 can drastically reduce the amount of time spend on post processing a model.  Before the Stratasys J750, no single 3D printer could deliver full color, smooth surfaces and multiple materials. A shop that wanted to achieve all of these qualities would have had to adopt multiple 3D printing technologies and still resort to extensive post-processing, such as sanding, painting and bonding.

 

J750_ControlPnl_hands - Medium Quality JPG

Fast, Efficient Workflow

PolyJet Studio is the latest generation of ObjetStudio Software.  The intuitive interface makes it easy to choose materials, optimize the build and manage print queues.

The six-material capacity means less time spending changing over materials, less waste purging to switch materials and less overall down time.

There is so much more to the J750.  Please join us for a webinar to learn more and get your questions answered by our Application Engineer and PolyJet Technology expert, James Barker.

REGISTER today for our upcoming webinar to find out even more about this game-changing technology.

If you have any questions or encounter a problem while registering, please email kathryn.pesta@padtinc.com or call Kathryn at 480.813.4884.

Take a look at some other cool prototypes made on the J750.

J750 Console StickshiftJ750 Cartoon CharactersJ750_Tennis Shoes_GreenSide2 - Low Resolution JPGJ750_Liver2 - High Resolution JPGFEAJ750_Sushi 1_R - Low Resolution JPG

PADT and ASU Collaborate on 3D Printed Lattice Research

The ASU Capstone team (left to right): Drew Gibson, Jacob Gerbasi, John Reeher, Matthew Finfrock, Deep Patel and Joseph Van Soest.
ASU student team (left to right): Drew Gibson, Jacob Gerbasi, John Reeher, Matthew Finfrock, Deep Patel and Joseph Van Soest

Over the past two academic semesters (2015/16), I had the opportunity to work closely with six senior-year undergraduate engineering students from the Arizona State University (ASU), as their industry adviser on an eProject (similar to a Capstone or Senior Design project). The area we wanted to explore with the students was in 3D printed lattice structures, and more specifically, address the material modeling aspects of these structures. PADT provided access to our 3D printing equipment and materials, ASU to their mechanical testing and characterization facilities and we both used ANSYS for simulation, as well as a weekly meeting with a whiteboard to discuss our ideas.

While there are several efforts ongoing in developing design and optimization software for lattice structures, there has been little progress in developing a robust, validated material model that accurately describes how these structures behave – this is what our eProject set out to do. The complex internal meso- and microstructure of these structures makes them particularly sensitive to process variables such as build orientation, layer thickness, deposition or fusion width etc., none of which are accounted for in models for lattice structures available today. As a result, the use of published values for bulk materials are not accurately predictive of true lattice structure behavior.

In this work, we combined analytical, experimental and numerical techniques to extract and validate material parameters that describe mechanical response of lattice structures. We demonstrated our approach on regular honeycomb structures of ULTEM-9085 material, made with the Fused Deposition Modeling (FDM) process. Our results showed that we were able to predict low strain responses within 5-10% error, compared to 40-60% error with the use of bulk properties.

This work is to be presented in full at the upcoming RAPID conference on May 18, 2016 (details at this link) and has also been accepted for full length paper submission to the SFF Symposium. We are also submitting a research proposal that builds on this work and extends it into more complex geometries, metals and failure modeling. If you are interested in the findings of this work and/or would like to collaborate, please meet us at RAPID or send us an email (info@padtinc.com).

Our final poster and the Fortus 400mc that we printed all our honeycomb structures with
The final poster summarizing our work rests atop the Stratasys Fortus 400mc that we printed all our honeycomb structures on

AMUG 2016 Recap

AMUG LogoThis was my first year attending AMUG (Additive Manufactures User Group) and after attending RAPID last year in Long Beach, California, it exceeded my expectations.  Everyone I ran into last year at RAPID said that I HAD to attend AMUG since I am a user of both Stratasys Polyjet and FDM technologies.  Once I found out the dates I immediately asked my supervisor if I could attend this years AMUG that was held in good old St. Louis, Missouri!  I am so glad I was able to make it to AMUG.  Every day we had the decision to pick between 18 different presentations.  Not all of the presentations were repeated each day.  We had presentations from Universities, Aerospace, Defense, Medical, Manufactures of 3D printers and many more!  I needed a clone of myself because the decisions of choosing one presentation over another was way too difficult.  Luckily there were 5 representatives from PADT at this convention and we were able to share notes.

Stratasys J750

Stratasys unveiled a new 3D printer on the first day of AMUG and it is phenomenal! It is called the Stratasys J750.  The user has the ability to print with 6 different materials at the same time choosing between 360,000 different colors!  What other 3D printer is there that you can load Digital ABS, Tango (rubber), and different colors and build with them?  NONE!  Stratasys also revamped their print heads by doubling the amount of nozzles per material which results in better layer resolution!  All print modes have finer layers resulting in better aesthetics than any other printer previous with High Quality layers at 14 microns!  By teaming up with Adobe, the user can import a CAD file into Adobe Photoshop to assign a color pattern, picture, or even a texture to their CAD file.  To say I am excited about this printer is an understatement!  I need one now!Hean J750SSYS Display

STRATASYS WORKSHOPS:

Carbon fiber soluble core workshop

In this workshop we learned how to setup a soluble core, that was printed on a Stratasys Fortus 450 MC using the SR-30 support, for a carbon fiber application.  This is a great application for the soluble support material. Turns out there are many customers using this application so that they don’t have to inventory expensive tools and can print on demand cores for their customers.

Soulable Core 2Soluable Core 1

During this presentation we learned that you will need to sand the part and then apply some sealing agent to the core/mandrel.  As for what type of sealing agent works best?  The answer is all.  They haven’t had any issues with different sealing agents from different vendors.  Several coats are needed.  When the part is building, you have the ability to setup pauses in the build so that you can add inserts or bushings to the part.  Because Aluminum dissolves in Sodium Hydroxide, you will want to use a different metal.

If this is a application that you are interested in, please email me at James.barker@padtinc.com and I will respond ASAP to you inquiries.

Injection Mold 3D Printed Inserts 

This application is a huge money and time saver as well!  In this picture the inserts were 3D printed using a Digital ABS-Like material from a Polyjet printer.  The brackets and ejector plate were printed using the FDM technology and built out of Ultem 1010.    These builds took under 3 hours to build and allow the customer to quickly inject material to prove the design using the actual material required!  A few months ago we held a seminar in Utah at 2 different locations and taught this application with a Stratasys expert.  Here is a neat video Professor Jonathan George did showing this application in use: YouTube.

Here is a video that Stratasys put out that shows their printers in use and the whole process as well.  YouTube

IM Molds

ADDITIVE MANUFACTURING at GE AVIATION

LEAP Engine Fuel Nozzle

GE’s biggest success story is their LEAP Engine Fuel Nozzles.  For each LEAP engine manufactured there are 19 fuel nozzles needed.  Instead of assembling them by hand they are now all 3D printed.  10,000 engines have been sold to date since the engine was introduced in 2012.  By 2018, GE needs to 3D print 35,000 fuel nozzles and by 2020, they have estimated that they will need a total of 100,000 nozzles.  There is a 25% weight reduction and these parts are 5 times more durable than conventional manufacturing methods.

LEAP Enginh Fuel Nozzle

T25 Temperature Sensor

This housing is an inlet temperature sensor that was the 1st 3D printed part certified by the FAA to fly inside a GE commercial jet engine! GE Aviation is retrofitting 400 GE90-94B engines that power Boeing 777’s.  These sensors are subjected to all elements so there was rigorous testing done to ensure safety.

T25 Temp Sensor

The Center for Additive Technology Advancement CATA

This facility is already open and running.  The goal is to advance Additive Manufacturing across all divisions of GE.  More information can be found here.

CATA

  XJET – NEW METAL TECHNOLOGY

XJET LogoI have been operating 3D printers going on 7 years.  I am a huge fan of Stratasys/Objet 3D Printers so I made sure to attend the presentation by XJET.

AMUG was XJET’s unveiling of their new metal technology.  XJET was formed in 2005 by the inventors of Objet/Polyjet technology.  Since 2005 they have been able to raise $170 million to help spur their new idea.  They call it Nano Particle Jetting™.  The way it works is they take a nano particle of metal and suspend it in a liquid material that is then jetted from the print heads very similar to how Polyjet printers work.  Since the metal is infused in a liquid material there isn’t any harm dealing with powdered metals which eliminates the fear of dealing with a combustible powder metal!  The parts are built in a heated chamber which evaporates the liquid material that was holding the nano particle.  Another key part to their technology is the support material which is NOT the same material as the metal!  During the presentation, Dror Danai mentioned that there is no need to remove the support material with a mechanical process.  The parts will need to be annealed to remove stresses that occur during the printing process.  While the part is being annealed the support material will be removed.  I am not sure how this is done, but it was hinted that the support dissolves or evaporates away.

XJET Machine

The print heads have 512 nozzles on each of them that can jet 18,000 droplets per second which helps achieve a layer thickness as fine as 2 Microns!!  Currently XJET has 7 machines that they are operating.  6 are in R&D and 1 is being used to print benchmarks for customers to help prove the technology.  Here is a link to their website showing how their technology works: XJET

If you would like to see this printer in person you can at RAPID which is in Orlando, Florida from May 16-19.  Here is a link to RAPID.

CONCLUSION

SSYS Ice SculptureThere are many other presentations and workshops that aren’t covered in this synopsis.  I focused on things that really excited me about the future of where this technology is headed.  If XJET technology is scalable, it can be revolutionary.  GE continues to be at the forefront of this technology and is continually pushing the limits of Additive Manufacturing.  The workshops I attended were mainly Stratasys driven because I was curious how you can make end-use production parts with their 3D printers.  Also the unveiling of the Stratasys J750 helps confirm that innovation is still taking part by one of the leaders in Additive Manufacturing in showcasing their new 3D printer that can print with 6 different materials!

All in all I had a phenomenal time at AMUG and met some very interesting people that share my same passion for 3D printing.  If you have the opportunity to go to RAPID this  year in Florida, please let me know your thoughts of it.  I have heard there are some new materials coming out from Stratasys along with new 3D printers that will be showcased.  It is amazing where 3D printers have come from, and I am anxious to see where we are headed!

If you would like to contact me with any questions then please email me at this email address:

James.Barker@padtinc.comJames

James Barker, Application Engineer

Phoenix Analysis & Design Technologies

Technology Trends in Laser-based Metal Additive Manufacturing

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Figure 1. Concept Laser’s M2 Cusing at AMUG 2016

One of the more difficult things about being at the Additive Manufacturing Users Group (AMUG) is dealing with the fact that there is more to do than you can hope to accomplish in four and a half days. So I decided to focus on two themes: laser-based metal additive manufacturing (AM); and design & simulation for AM. In this post, I focus on the former and try to distill the trends I noticed across the laser-based metal AM system manufacturers that were present at the conference: Concept Laser, SLM, Renishaw, EOS and 3D Systems (listed here in the decreasing order of the time I spent at each supplier’s booth). While it is interesting to study how 5 different suppliers interpret the same technology and develop machines around it, it is not my objective to compare them here, but to extract common trends that most suppliers seem to be working on to push their machines to the next level. For the purposes of this post, I have picked the top-of-the-line machine that each supplier offers as an indication of the technology’s capabilities: they span a range of price points, so once again this is not meant to be a comparison.

As a point of observation, the 5 key trends I noticed turned out to be all really aspects of taking the technology from short run builds towards continuous production. This was not my intent, so I believe it is an accurate indication of what suppliers are prioritizing at this stage of the technology’s growth and see as providing key levers for differentiation.

1. Quality Monitoring

Most customers of AM machines that wish to use it for functional part production bemoan the lack of controls during manufacturing that allow them to assess the quality of a part and screen for excursionary behavior without requiring expensive post-processing inspection. Third party companies like Sigma Labs and  Stratonics have developed platform-independent solutions that can be integrated with most metal AM systems. Metal AM suppliers themselves have developed a range of in-situ monitors that were discussed in a few presentations during AMUG, and they generally fall into the following categories:

  • Input Monitors:
    • Laser: Sensors monitor laser powder as well as temperature across the different critical components in the system
    • Oxygen Level: Sensors in the build chamber as well as in sieving stations track O2 levels to ensure the flushing of air with inert Argon or Nitrogen has been effective and that there are no leaks in the system
  • Output Monitors:
    • Live video: simple but useful, this allows users to get a live video stream of the top layer as it is being built and can help detection of recoater blade damage and part interaction
    • Meltpool: Concept Laser showed how its Meltpool monitoring system can be used to develop 2D and 3D plots that can be superimposed with the 3D CAD file to identify problematic areas – the video is also on YouTube and embedded below. SLM and EOS offer similar meltpool monitoring solutions.
    • Coater consistency: Concept Laser also described a monitor that captures before and after pictures to assess the consistency of the coater thickness across the build area – and this information is fed forward to adjust subsequent coater thicknesses in an intelligent manner.

Quality monitoring systems are still in their infancy with regard to what is done with the information generated, either in terms of feed forward (active) process control or even having high confidence in using the data to validate part quality. A combination of supplier development and academic and industry R&D is ongoing to get us to the next level.

2. Powder Handling

In a previous post, I touched upon the fire and explosion risks posed by metal powder handling. To lower the bar for an operator to gain access to a metal AM machine, one of the considerations is operator safety and the associated training they would need. Suppliers are constantly trying to improve the methods by which they can minimize powder handling. For a mechanical engineer, it is intriguing to see how reactive metal powders can be moved around in inert atmospheres using different strategies. The SLM 500HL uses a screw system to move the powder around in narrow tubes that stick out of the machine and direct the material to a sieving station after which they are returned to the feed area. The Renishaw RenAM 500M on the other hand uses a pneumatically driven recirculation system powered by Argon gas that is well integrated into the machine frame. Concept Laser also offers automated powder handling on the XLine 2000R, while EOS and 3DSystems do not offer this at the moment. Figure 2 below does not do justice to the level of complexity and thought that needs to go into this.

Figure 2. Two different automated powder handling systems in use in metal AM machines

One of the limitations of automating powder handling is the ability to change materials, which is very hard to impossible to do with high enough confidence with these systems. As a result, their use is limited to cases where one machine can be dedicated to one material and efficiency gains of powder handling can be fully realized. The jury is still out on the long term performance of these systems, and I suspect this is one area that will continue to see improvements and refinements in subsequent model releases.

3. Multi-Laser Processing

In the quest for productivity improvement, one of the biggest gains comes from increasing the number and power of available lasers for manufacturing. In my previous experience with laser based systems (albeit not for this application), an additional laser can increase overall machine throughput by 50-80% (it does not double due to steps like the recoater blade movement that does not scale with the number of lasers).

The suppliers I visited at AMUG have very different approaches to this: SLM provides the widest range of customizable options for laser selection with their 500HL, which can accept either 2 or 4 lasers with power selection choices of 400W or 1000W (the 4 laser option was on display, YouTube video from the same machine in action is below) – the lasers of different powers can also be combined to have two 400W and two 1000W lasers. Concept Laser’s XLine 2000R allows for either 1 or 2 1000W lasers and their smaller, M2 machine that was showcased at AMUG has options for 1 or 2 lasers, with power selection of 200W or 400W. EOS, Renishaw and 3D Systems presently offer only single laser solutions: the EOS M 400 has one 1000W laser, Renishaw’s RenAM 500M has one 500W laser and the ProX DMP 320 from 3D Systems has one 500W laser.

There are a few considerations to be aware of when assessing a multi-laser machine: Each laser drives an increase in machine capital cost. But there is another point of note to remember when using multi-laser systems for manufacturing that centers around matching process outputs from different lasers: laser-to-laser variation can be a dominant source of overall process variation and can drive a need to calibrate, maintain and control both lasers as if they were independent machine systems. Additionally, development of  a process on one particular laser power (100W, 400W, 500W, 1000W) may not scale easily to another and is something to remember when developing a long term strategy for metal AM that involves different kinds of machines, even if from the same supplier.

4. Software Integration

Renishaw spent a significant amount of time talking about their easy-to-use QuantAM software which is designed to integrate Renishaw process parameters and part processing information more tightly and allow for seamless process parameter development without needing third part software like Magics. Additive Industries announced in their presentation at AMUG that they had just signed an agreement with 3DSIM to integrate their support design software solution into their MetalFab1 machine. Software integration is likely to be an increasing trend especially around the following areas:

  • Improving support design methods and reducing its empirical nature and reducing the material, build time and support removal costs associated with them as well as eliminating the need for iterative builds
  • Increasing process options available to the user (for example for the outer skin vs the inner core, or for thick vs thin walls)
  • Simplifying the development of optimized process parameters for the user working on new materials
  • Integrating design and process optimization to increase effective part performance

In a future blog post, I will look specifically at the many design and simulation tools available around AM and how they are connected today even if not well-synergized.

5. Modular System Architectures

In a list of mostly evolutionary changes, this is the one area that struck me as being a step-change in how this technology will make an impact, even if it will be felt only by larger scale manufacturers. Concept Laser and Additive Industries are two companies that delivered presentations discussing how they were approaching the challenge of revolutionizing the technology for true production and minimizing the need for human touch. Common to both is the notion of modularity, allowing for stacking of printing, powder removal, heat treating and other stations. While Additive Industries are developing a flow resembling a series production line, Concept Laser have taken the more radical approach of having autonomous vehicles delivering the powder bed to the different stations, with travel channels for the vehicles, for the operator and for maintenance access (Figure 3). Both companies expect to have solutions out by the end of this year.

Figure 3. Concept Laser’s “Factory of Tomorrow” features swim-lanes for operators and for autonomous vehicles that will deliver powder and parts from one module to another

Concluding Thoughts

It is an interesting time to be a manufacturer of laser-based metal 3D printers, and an even more interesting time to be a consumer of this technology. The laser-material interaction fundamentals of the process are now fairly well-established. Competitors abound both in existing and emerging markets with machines that share many of the same capabilities. Alternative technologies (E-Beam melting, deposition and jetting) are making strides and may start to play in some applications currently dominated by laser-based technologies. A post early-adopter chasm may be around the corner. This will continuously drive the intense need to innovate and differentiate, and possibly also lead to a merger or two. And while most of the news coming out of conferences is justifiably centered around new process technologies (as was the case with Carbon’s CLIP and XJET’s metal nanoparticle jetting at AMUG this year), I think there is an interesting story developing in laser-based powder bed fusion and can’t wait to see what AMUG 2017 looks like!

Press Release: 3D Printing Expertise from PADT Advances Aerospace Industry

ula-rocket-duct-made-from-3d-printed-partsMany of you may have seen the recent launch of an Atlas V rocket from United Launch Alliance (ULA).  We are honored to have lent our expertise to ULA’s 3D Printing efforts that resulted in the use of parts on that rocket made with additive manufacturing.   We will be talking about that and other ways we help the Aerospace Industry at the 32nd Space Symposium this week in Colorado Springs Colorado.  Please stop by!

Read more in the press release.  A PDF can be found here.

Press Release:

3D Printing Expertise from PADT Advances Aerospace Industry

Product design and development leader provides additive manufacturing support for United Launch Alliance Atlas V rocket

COLORADO SPRINGS, Colo.April 11, 2016PRLog — Phoenix Analysis & Design Technologies Inc. (PADT), the Southwest’s largest provider of Numerical Simulation, Product Development, and 3D Printing services and products, is highlighting its expertise this week at the 32nd Space Symposium,  the premier global, commercial, civil, military and emergent space conference.

During the symposium, PADT experts in additive manufacturing will be on hand to discuss the company’s technical expertise, logistics, sales and service capabilities in the exciting aerospace sector, which contributed to the successful launch on March 22 of a United Launch Alliance (ULA) Atlas V rocket. The Atlas V rocket made use of lightweight thermoplastic 3D printed parts, with the application of Stratasys technology supplied by PADT and consulting from PADT on how best to apply that technology to engineering, tooling, and production.

Stop by and visit PADT’s booth 1310 at the 32nd Space Symposium, April 11-14, in Colorado Springs, Colorado. http://www.spacesymposium.org/.

“PADT continues to be both a great supplier of both polymer and metal additive manufacturing technologies and an additive manufacturing technical consultant to ULA, supporting our Atlas V, Delta IV and future Vulcan Centaur launch vehicles,” said Greg Arend, ULA manager, Additive Manufacturing. “By consulting with PADT, we were able to understand how these technologies enhance our design and manufacturing process, saving time, money and weight. PADT’s knowledge of the use of both polymer and metal materials was instrumental in helping us achieve our success.”

In addition to supplying ULA with Stratasys’ polymer 3D Printing machines, PADT consulted with them early on andled a tour of Oakridge National Labs to help them understand the state of the art for both metal and polymer applications and produced a technological roadmap for both technologies that has largely been followed.  Assisted by PADT, both companies made use of additive manufacturing for engineering prototypes, then advanced to the production of tooling for manufacturing and developed the confidence needed to move to flight hardware.

The founders of PADT have been involved with additive manufacturing since the late 1980’s and the company was the first service provider in the Southwest in 1994.  Over the years, PADT has built a reputation for technical excellence and a deep understanding of how to apply various 3D printing technologies to enable real world applications.  Their sales team has shown the ability to sell sophisticated engineering products to companies large and small, and to provide excellent support to their customers.

“3D Printing is not just about makers, nor is it just about engineering prototypes,” said Rey Chu, co-owner, principal and director of Manufacturing Technologies at PADT. “Every day users are creating production hardware to produce usable parts that save them time and money. Ducts for rockets are a perfect application of 3D printed parts because they are complex, low volume, and can make single parts that need to be made in multiple pieces using traditional methods.”

About Phoenix Analysis and Design Technologies

Phoenix Analysis and Design Technologies, Inc. (PADT) is an engineering product and services company that focuses on helping customers who develop physical products by providing Numerical Simulation, Product Development, and Rapid Prototyping solutions. PADT’s worldwide reputation for technical excellence and experienced staff is based on its proven record of building long term win-win partnerships with vendors and customers. Since its establishment in 1994, companies have relied on PADT because “We Make Innovation Work.” With over 80 employees, PADT services customers from its headquarters at the Arizona State University Research Park in Tempe, Arizona, and from offices in Torrance, California, Littleton, Colorado, Albuquerque, New Mexico, and Murray, Utah, as well as through staff members located around the country. More information on PADT can be found at http://www.PADTINC.com

— End —

 

Reactive and Non-Reactive Metal Alloys in Laser-based Powder Bed Fusion

One of the first concepts you come across in metal 3D printing is the notion of reactivity of the powder metal alloys – in this post, I investigate why some of these powder alloys are classified as reactive and others as non-reactive, and briefly touch upon the implications of this to the user of metal 3D printing tools, scoping the discussion to laser-based powder bed fusion. Ultimately, this boils down to a safety issue and I believe it is important that we, the users of these technologies, truly understand the fundamentals behind the measures we are trained to follow. If you are looking to get something chemical etched visit https://interplex.com/technology/process-capability/chemical-etching/.

Figure 1 below is indicative of the range of materials available currently for the laser-based powder bed fusion process (this selection is from Concept Laser). I have separated these into non-reactive and reactive metal alloys. The former includes steels, Inconels, bronze and CoCrW alloys. The reactive metal alloys on the other hand are Aluminum or Titanium based. The question is: what classifies them as such in the context of this process?

Figure 1.
Figure 1. Typical metal alloys available for the laser-based powder bed fusion process (from Concept Laser), classified as Non-Reactive and Reactive

Reactivity in this process really pertains to the likelihood of the alloy in question serving as a fuel for a fire and/or an explosion, which are two related but distinct phenomena. To truly understand the risk associated with powder metals, we must first understand a few basic concepts.

1. Fire and Explosion Criteria

Figure 2 is a commonly used representation of the criteria that need to be met to initiate a fire (fuel, oxygen and an ignition source) and an explosion (the same three criteria for a fire, plus a dust cloud and confined space). When handling reactive metal alloy powders, it is important to remember that two of the three requirements for a fire are almost always met and the key lies in avoiding the other criterion. When not processing the powder in the machine, it is often subject to ambient oxygen content and thus all precautions are taken to prevent an ignition source (an ESD spark, for example). When the metal is being processed with a high power laser, it is done in an inert atmosphere at very low Oxygen levels. This thought process of appreciating you are one criterion away from a fire is useful, if sobering, to bear in mind when working with these powders.

fireexplosion
Figure 2. The fire triangle and explosion pentagon

2. Terms Used to Describe Fire and Explosion Risk

There are several terms used to describe fire and explosion risk. I have picked 5 here that tie into the overall “index” I will discuss in the following section. All these parameters are in turn functions of the material in question, both with regard to its composition and its size distribution and are co-dependent. These definitions are adapted from Benson (2012) and Prodan et al. (2012).

  • Fire Related: These two terms describe the sensitivity of a metal dust cloud to ignition.
    • Ignition Temperature: This is the lowest surface temperature capable of igniting a powder or dust dispersed in the form of a dust cloud
    • Minimum Ignition Energy: This measures the ease of ignition of a dust cloud by electrical and electrostatic discharges.
  • Explosion Related: These terms describe the severity of an explosion arising from a fire once ignited.
    • Minimum Explosion Concentration (MEC): This is the smallest amount of dust which when suspended in air, under a set of test conditions, will initiate an explosion and propagate even after the action of the ignition source has ceased.
    • Maximum Explosion Pressure: This is a measure of the highest pressure that occurs during of an explosion of a flammable mixture in a closed vessel.
    • Maximum Rate of Pressure Rise: This is the maximum slope of the pressure/time curve during a flammable mixture explosion in a closed vessel.

3. Index of Explosibility

Having defined these terms, the question is how they can be tied together to give some sense of the hazard associated with each metal powder. I came across a 1964 US Bureau of Mines study that defined an Index of Explosibility as a measure of the hazard risk posed by powder metal alloys. The index represents both the sensitivity of the powder to ignition, and once ignited, the severity of the resulting explosion. Since this is a subjective metric, it is normalized by comparison against a “standard”, which was selected as Pittsburgh coal dust in the 1964 study. Importantly though, this normalization enables us to do qualitative comparisons between metal powders and have some sense of the hazard risk posed by them. Figure 3 is the equation reproduced from the original 1964 report and shows how this term is estimated.

Index of Explosibility (US Bureau of Mines study, 1964)
Figure 3. Index of Explosibility (US Bureau of Mines study, 1964)
Figure 3. Particle size has a significant impact on explosibility
Figure 4. Particle size has a significant impact on explosibility

The study also showed how the index was a direct function of particle size. Most powders for 3D metal printing are in the 20-100um range, and as shown in Fig. 4 for atomized Aluminum, the risk of an explosion increases with reducing particle diameter. 

The authors tested a range of metals and computed the different variables, which I have compiled anew in the table in Figure 5 for the ones we are interested in for metal 3D printing. The particle sizes in the 1964 study were ones that made it through a No. 200 sieve (less than 75 microns), but did not include sub-micron particles – this makes it an appropriate comparison for metal 3D printing. It is clear from the Index of Explosibility values, as well as the Cloud Ignition Temperatures in the table below why Aluminum and Titanium are classified as reactive metals requiring special attention and care.

Figure . Explosibility study findings from US Bureau of Mines study (1964)
Figure 5. Index of Explosibility comparison for selected metal alloys, adapted from US Bureau of Mines study (1964)

4. Implications for Metal 3D Printing

So what does this mean for metal 3D printing? There are three things to be aware of that are influenced by whether you are working with non-reactive or reactive alloys – I only provide a general discussion here, specific instructions will be provided to you in supplier training and manuals and must be followed.

  • Personal Protective Equipment (PPE): There are typically two levels of PPE: standard and extended. The standard PPE can be used for non-reactive alloy handling, but the reactive alloys require the more stringent, extended PPE. The main difference is that the extended PPE requires the use of a full bunny suit, ESD grounding straps and thermal gloves.
  • Need for Inert Gas Handling: Many tasks on a metal 3D printer require handling of powder (pouring the powder into the chamber, excavating a part, cleaning the chamber of powder etc.). Most of these tasks can be performed in the ambient for non-reactive metal alloys with standard PPE, but for reactive alloys these tasks must be performed in an inert atmosphere.
  • Local authority approvals: It is important that your local authorities including the fire marshall, are aware of the materials you are processing and review and authorize their use in your facility before you turn on the machine. Local regulations may require special procedures be implemented for preparing the room for use of reactive metal alloys, that do not apply to non-reactive metals. It is vital that the authorities are brought into the discussion early on and necessary certifications obtained, keeping in mind that reactive metal alloy use may drive additional investment in safety measures.

5. Conclusion

Safe operation of metal 3D printers requires installation of all the necessary safety equipment, extensive hands-on training and the use of checklists as memory aides. In addition to that, it helps to connect these to the fundamental reasons why these steps are important so as to gain a clearer appreciation of the source of the hazard and the nature of the risk it poses. In this article I have tried to demonstrate why reactivity in metal 3D printing matters and what the basis is for the classification of these metal alloys into reactive and non-reactive by leveraging an old 1964 study. I wish to close with a reminder that this information is meant to supplement formal training from your equipment supplier – if there is any conflict in the information presented here, please revert to your supplier’s recommendations.

Thank you for reading; stay safe as you innovate!

Additive Manufacturing and the Navy SBIR Program – brought to you by RevAZ, AZ Commerce Authority, and PADT

RevAZ-ACA-PADT-Logos-1

Learn more about the Navy Sea SBIR Program from Jonathan Leggett, the NAVSEA SBIR Program Manager, about how AZ Manufacturers can use SBIR Grants to assist in funding R&D early stage innovation.  Jonathan will also review the Navy’s roadmap on additive manufacturing and 3D printing.  There will be 15 minute one-on-one sessions from 1:30 – 4:00 to answer your specific questions with:

  • Jonathan Leggett, NAVSEA SBIR Outreach Program Manager
  • Dave Garafano, ACA Executive Director of RevAZ
  • Jill HowardAllen, ACA Manger of Technology Commercialization & SBIR Programming

Register Now!

Who Should Attend?

  • Small to Medium Sized Businesses – (500 or less)manufacturers interested in learning how the SBIR/STTR program may assist them in commercializing their early stage innovation.
  • Large & Medium Sized Businesses and/or 3rd Party Investors – Those seeking to partners with the SBIR/STTR small businesses to (a) establish the requirements and specification for the proposed outcomes; and (b) provide financial resources and collaboration for commercializing the results
  • University/Institute Faculty and Staff – Those seeking consulting and partnering opportunities with the small business on the SBIR/STTR grant

When: April 7
10:00-12:00 – Navy SBIR Overview & Navy
Additive Manufacturing Technology Roadmap
1:30- 4:00 – 15 Minute 1:1 Sessions with Jonathan Leggett

Where: PADT
7755 S Research Dr.
Suite 120
Tempe, AZ 85284

Please Register to Reserve your Spot!

Direct any questions to Jill HowardAllen at JillH@azcommerce.com or call 602 845 1291.

PADT is honored to be hosting the event and taking part in the training.

Ovid: A Teaching Tool for 3D Printing

ovid-1-1Meet Ovid.  He is a very simple character that we use to explain 3D Printing to kids. Explaining how 3D Printing works to anyone without a technical background can be tough. To help out PADT has created a collection of resources that shows how it is done, including a hands on model for younger kids, that feature Ovid as the object being printed.

Let’s start by getting technical.  3D Printing is a common term for a class of manufacturing methods referred to as Additive Manufacturing.  In 3D Printing you take a computer model and you print it out to get a real world three dimensional object. The way we do it is that we slice the computer model into thin layers, then build up material in the 3D printer one layer at a time.  Here is a simple GIF showing the most common process:

FDM-Animation.gif

This is Fused Deposition Modeling, or FDM. If a classroom has a 3D Printer it is most likely an FDM printer.

The idea behind these resources is to show the process:

  1. Start with a 3D Computer model
  2. Slice it
  3. Build it one layer at a time

The materials below can be used by parents or teachers to explain things to kids, K-8. Please use freely and share!

Presentation

This PowerPoint has slides that explain the 3D Printing process and the video is of the slides being presented, with our narration.

PowerPoint: Ovid-Presentation-3D_Printing

Making a Hands-On Ovid

ovid-model-3Our fun little plexiglass model of Ovid is an example of a manual 3D printing process. Students can stack up the layers to “3D Print” their own Ovid by hand, reinforcing the layered manufacturing process.

We did everything the same as a real 3D Printer, but instead of automatically stacking the layers, we cut each layer on a laser cutter and the students do the cutting.

Here is a video showing the laser cutting.

And this is a zip file containing the geometry we used to make Ovid in STEP, IGES, Parasolid, and SAT.

To put it all together we created a triangular rod with a base and height that are identical.  Figure out the size you need once you have scaled the geometry for your version of Ovid. we glued the rod to a base.

ovid-model-1 ovid-model-4 ovid-model-2

Files for 3D Printing and Other Information

If you have access to a 3D Printer, you can print your own Ovid.  Here is an STL and a Parasolid: Ovid-PADT-3D_Printing-1

We also have a video showing how the software for the printer slices the geometry and makes the tool path for each layer:

And to round things out, here is a few minutes of Ovid being made in one of our Stratasys FDM printers: