BTAC | Additive Manufacturing and “3D Printing”

Have you heard about 3D printing and want to learn how you can utilize this technology in product design or your manufacturing operations?

Do you want to design and build a prototype? Do you want to manufacture fully functional assemblies and customized parts?

Become a part of the “3D printing” revolution in manufacturing and entrepreneurship by learning about the capabilities that additive manufacturing offers. In this course, you will gain hands-on experience in laser sintering and fused deposition modeling and build a CAD model of your choice or own design. We will discuss case studies of several applications of additive manufacturing, including designing and manufacturing patterns, molds, prototypes, proofs of concept, assemblies, and custom parts. We will also discuss the pros and cons of additive manufacturing, including dimensional accuracy, surface finish, process planning, production time, product and part customization.

Course Developer / Instructor: Dr. Victoria Townsend Victoria Townsend is an industrial and mechanical engineer working with the Bluewater Technology Access Centre at Lambton College. She has worked in an additive manufacturing lab for more than 7 years, with experience in fused deposition modeling, 3D printing, and laser sintering. In one project, she worked with a local foundry and team to combine additive manufacturing and machining in order to successfully manufacture a low-cost, short lead time sand casting pattern for a V8 engine section.

The course consists of two weekend mornings. To register, please contact:

Bluewater Technology Access Centre
Cheryl Peaslee, Administrative/Finance Assistant

*protected email*

519-383-8303 Ext 238

Roboze Continues EMEA Expansion Into Six New Regions, Partners With Three Resellers

roboze-1Anyone who has ever thought of building their own 3D printing company or product has likely had a vivid vision of their idea being utilized and enjoyed by people throughout the world. But, in reality, expanding into the global market is a feat that newfound companies can rarely do on their own. That’s why the Bari, Italy-based 3D printing company Roboze appointed Gil Lavi as the VP of Sales & Business Development back in March.

Lavi’s new position essentially placed him in charge of expanding the company’s professional-grade Roboze ONE and ONE +400 3D printers throughout the market in Europe, the Middle East, and Africa (EMEA). Thus far, they’ve found recent success by partnering with the likes of Lino S.A., which has helped them increase their presence in the Balkan Peninsula. Now, Roboze has announced three new partnerships with various resellers that will help bring Roboze’s 3D printer line to six unexplored regions.

“We are thrilled to face rapid expansion of our distribution channels in EMEA,” said Lavi. “We continue to see a strong shift of professional users from low cost concept modeling towards professional 3d printing solutions, with a clear focus on advanced materials for real functional applications.”

Roboze ONE+ 400

Roboze ONE+ 400

In order to expand into the Romanian and Bulgarian markets, Roboze has partnered up with the Craiova, Romania-based retailer CadWorks International. The new reseller will focus on implementing Roboze’s 3D printing technology into the automotive, electronics, engineering, and educational sectors, and will also exhibit their technology at the Bucharest International Technical Fair, which is taking place from October 12 to 15 at the ROMEXPO.

To break into the 3D printing markets of Slovakia, the Czech Republic, and Hungary, Roboze has also struck up a partnership with Robustech, which is based Komárno, Slovakia. The reseller will primarily focus their attention on the automotive industry, which is one of the strongest segments in the region. Robustech will also be showcasing Roboze’s 3D printing solutions at the International Engineering Fair in Brno, Czech Republic, which takes place October 3-7, as well as the Automotive Hungary exhibition in Budapest from October 19-21.

Lastly, Roboze will also expand into the Turkish region by enlisting the help of the Istanbul-based 3D technology reseller Yenasoft. The reseller has already established itself as one of the leading partners for SOLIDWORKS CAD/CAM solutions, and will now offer Roboze’s 3D printing technology to its professional clients who are seeking powerful 3D printing solutions. The company will present Roboze 3D printers from October 11-16 at the Maktek Fair in Istanbul.


All in all, the latest round of partnerships have Roboze poised to conquer the 3D printing market throughout Europe, as well as to get a foot in the door of the Middle Eastern market as well. By offering their professional-grade 3D printers at an affordable price throughout the world, Roboze is spreading out from their original confines in Southern Italy to professionals across the plentiful EMEA regions. For Lavi and Roboze, this year has been all about expansion, and that’s exactly what the Italian 3D printing company has managed to do thus far.

New Multi-Material Upgrade Released For Prusa i3 MK2 3D Printer

When it comes to bringing 3D printing technology to the next stage of innovation, one of the key aspects that the industry has focused on is multi-material printing capabilities. Whether it be in the form of an industrial-level machine like the Stratasys J750 or a DIY project to transform a desktop 3D printer into a multi-material marvel, the truth remains the same; the future success of this industry is heavily dependent on the ability to produce objects in multiple colors and materials.

original_prusa_i3_mk2_multi_materialNow that multi-material printing is finally reaching the consumer-level market, who better to introduce it than Josef Průša, founder of Prusa Research, the Czech 3D printing startup that transformed the open-source RepRap 3D printer model into one of the most affordable and beloved desktop 3D printers in the world. His latest 3D printer iteration, the Prusa i3 MK2, is equipped with more innovative features than ever before, including a powerful heated bed, an upgraded frame, improved electronics, and a brand new Calibrate XYZ function. Now, Prusa has unveiled another upgrade that will transform the Original Prusa i3 MK2 into a multi-material 3D printer.

The new upgrade option allows Prusa users to print with up to four different materials or colors all at once. The additional components include four material feeders and just one hotend, making the unique solution calibration-free and much easier to use then other multi-material systems. The multi-material option is only available separate from the actual printer, but like all Prusa machines, the i3 MK2 is completely free to modify and upgrade. Key features of the new multi-material upgrade include perfect alignment during printing, zero calibration needs, no ooze shields, a similar build volume to the standard setup, a special multiplexing board, and a high-quality E3D hotend that is easy to assemble.


“Our approach to multi-material is extremely simple, but I had this idea in a drawer for a long time until I was 100% sure we can make the accompanying software easy enough,” said Průša. “Use of a single hotend with multiple filament drives will be the future of multi material FDM printer and I am happy we can push the envelope with it.”

4_extrudersThe new multi-material upgrade is currently available for preorder; the two-material option costs $199 while the four-material option costs $249. The upgrade will be shipped out to customers at the end of November, and Prusa will be exhibiting the new component at a number of upcoming 3D printing conferences and events, including the TCT Show in Birmingham, Digical Show London, Maker Faire NYC, Open Hardware Summit in Portland, Print in 3D/ModelHobby in Prague, and Maker Faire Rome.

The i3 MK2 has already proven to be a hit for the Prusa team, which has grown three times as large since their latest 3D printer model was released five months ago. All in all, the new upgrade will give Prusa users an affordable and customizable option to enhance their open-source 3D printer. Instead of waiting for the right multi-material printer to come onto the market, Prusa i3 MK2 owners can simply transform the machine that they already have, know, and love. Discuss further in the Prusa i3 MK2 Upgrade forum over at

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barrel liner

[Guy in a garage] has made a 3D printed gun that not only appears to fire in the direction pointed, it can also do it multiple times. Which, by the standard of 3D printed guns, is an astounding feat. He started with .22 rifle cartridges but has since upgraded and tested the gun with .357 rounds. The link above is a playlist which starts of with an in-depth explanation of the .22 version and moves through design iterations

This gun prints on a standard FDM printer. Other 3D printable guns such as the infamous Liberator or the 3D printed metal gun need more exotic or precise 3D printing to work effectively. The secret to this gun’s ability is the barrel, which can be printed in nylon for .22 cartridges, or in ABS plus a barrel liner for .22 and .357 caliber.

A barrel liner is one way to repair a gun that has aged and is no longer shooting properly. Simply put, it is a long hardened metal tube with rifling on the inside. Some guns come out of the factory with one, and a gunsmith simply has to remove the old one and replace it. Other guns need to be bored out before a liner can be installed.

The metal liner surrounded by plastic offers enough mechanical strength for repeat firings without anyone losing a hand or an eye; though we’re not sure if we recommend firing any 3D printed gun as it’s still risky business. It’s basically like old stories of wrapping a cracked cannon in twine. The metal tries to expand out under the force of firing, but the twine, which would seem like a terrible material for cannon making, is good in tension and when wrapped tightly offers more than enough strength to hold it all together.

This is also how he got the .357 version to work. The barrel slots into the gun frame and locates itself with a rounded end. However, with the higher energy from a .357 round, this rounded end would act as a wedge and split the 3D printed frame. The fix for this was simple. Glue it back together with ABS glue, and then wrap the end of the assembly with a cable tie.

This is the first 3D printed gun we’ve seen that doesn’t look like a fantastic way to instantly lose your hand. It’s a clever trick that took some knowledge of guns and gunsmithing to put together. Despite the inevitable ethical, moral, and political debate that will ensue as this sort of thing becomes more prevalent, it is a pretty solid hack and a sign that 3D printing is starting to work with more formidable engineering challenges.

How Gossamer built Teal, the world's fastest production drone with help of 3D printing

Sep 27, 2016 | By Alec

Back in July of this year, the drone community was pleasantly surprised by the release of the Teal drone, the world’s fastest production drone with top speeds of over 70 mph. It’s really an astounding machine to see in action, even more so when you find out it was actually developed by the 18-year-old Utah-based developer George Matus. Drone enthusiasts are obviously eagerly awaiting the release of this very customizable drone, with shipping expected to start at the end of the year, but we are more intrigued by the Teal’s development process. For as product developer Chris Hsiao of Gossamer revealed, 3D printing technology played a crucial role in the development of this record-breaking speed demon.

But let’s start with the drone itself, as it is truly a paradigm-shifting creation. Officially launched in late July, Teal Drones reach speeds of over 70 mph and are capable of withstanding winds of up to 40 mph – easily breaking through existing records. What’s more the Teal is weatherproof and powered by the NVIDIA Jetson TX1, forming a revolutionary airborne supercomputer that can record 4K video and snap 13MP photos. Thanks to its Follow-Me feature, it can even autonomously follow you around.

In many ways, it’s thus one of the most powerful drones available to the public, and yet the Teal is fully customizable and open to both beginning and hardcore enthusiasts looking to race, gather data or simply explore the skies. While priced at a hefty $1300, the Teal arguably creates its very own class of flying opportunities. It’s no wonder that drone fans everywhere spontaneously started salivating.

Those stats are even more remarkable when you find out that mastermind George Matus is only 18 years old – though he has been dreaming about drones since he was eleven. Unlike most kids, the 11-year-old was seduced by the construction and modification of RC aircraft and drones, and started obsessively studying all aspects of flight. “Between the time I was 11-16 years old, I was able to fly most of the products on the market, get hands on experience, and basically build this wish list of everything I would want in a drone if I were ever to build my own,” Matus recalled in an interview. “That’s how Teal came to be.”

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Upon moving to Salt Lake City two years ago, he started Teal with the help of some pre-seed money from angel investor Mark Harris. The dream was simple in its ambition: to develop an incredibly fast, powerful, functional and accessible drone that is suitable for every conceivable drone application. Development was subsequently further supported by backing from the Thiel Fellowship, a foundation started by tech billionaire Peter Thiel that gives a $100,000 grants to young people who want to build new ideas and products. Matus’s plans were so convincing that he even secured $2.8 million during a completely under-the-radar seed round led by Pelion Venture Partners.

But what few people know is that this drone was actually conceived through 3D printing. For the body development, Matus enlisted the help of the Dallas-based product developer Gossamer, founded by Chris Hsiao. And as Hsiao explained, the challenge was in tailoring the legs, covers, battery cases and frames to suit the very specific list of needs and limitations Matus was envisioning. To realize this, Hsiao therefore purchased a MakerBot 3D printer to bring rapid iterating, real-time decision-making and extensive prototyping opportunities to the table.

Fortunately, Hsiao has extensive experience in designing aircraft parts and other very sleek and aerodynamic products (with Toyota and Airbus Helicopters among his clientele) and added valueof 3D printing quickly became apparent. “If we were going to make parts for a drone, we have the option of drafting them up in Solidworks. But we needed to actually get a feel for the parts in our hands because the shapes are so organic. Making the parts out of sheet metal or machining would’ve also been too costly,” Hsiao says on the MakerBot website. “So we went out and got a MakerBot. It was an easy decision to buy it, given the price, and the expensive, time consuming tasks it replaces. Its paid for itself several times over.”

Most importantly, the Gossamer team noticed that 3D printing can greatly speed up development. “Typically, it takes us days to create new models in foam or wood, and outsourcing can take weeks. Using our Replicator, we were able to have prototypes within a few hours,” Hsiao revealed, adding that it helped them reach their deadline. It was also particularly easy to embed the 3D printer in their workflow, as it allowed for continuous adjustments.

However, the developers did decide to upgrade to the Smart Extruder+ halfway during the project, as it improved the 3D printer’s reliability. This greatly helped them to realize the very specific body requirements of the Teal. “The Teal’s body required us to build some complex shapes and fine details into our designs. We needed to create smaller parts that snap together well, while facilitating the ideal arrangement of motors and electronic components,” Hsiao explains.

All in all, they 3D printed the upper and bottom shrouds, the battery cases and the center frames, and physically interacting with their prototypes made it very easy to check and understand design changes. “Being able to create quick, high quality prototypes gave us a better feel for the sort of organic shapes we were designing, while letting us check the physical fit and test different orientations. It helped us really hone and perfect these parts,” Hsiao added.

In fact, the Gossamer iteration process was completed in just a few months, much quicker than previous comparable projects. Hsiao and his team are therefore looking forward to integrating more 3D printing into their workflow, and have already been given early access to the MakerBot Replicator+ 3D printer. With its larger build volume and high 3D printing speeds, it should be perfect for rapid prototyping. “[This] is part of how we describe Gossamer to potential clients. Our ability to perfect ideas and turn around projects quickly is a great competitive advantage, and MakerBot’s printers have helped make that possible,” Hsiao concluded. And of course the Teal drone itself is an astounding example of high speed digital development through 3D printing.

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How a Roller Coaster Can Help You Pass a Kidney Stone

Illustration by Jim Cooke.

A team of researchers rode a roller coaster more times than they probably care to remember, just to figure out why roller coasters trigger the passage of small kidney stones. With the further help of a 3D-printed model of a kidney filled with urine, they think they’ve solved the puzzle.


In the new study, published in the Journal of the American Osteopathic Association, urologist David D. Wartinger and his colleagues at Michigan State University College present evidence to support widespread claims that riding a moderate-intensity roller coaster can help people pass small kidney stones. The results, though still preliminary, could assist in the development of a rather unconventional therapy for patients.

Kidney stones: The bigger they are, they harder—and more excruciatingly painful—they are to pass. (Image: G.L. Kohuth, Michigan State University)

Kidney stones are a mass of chemicals and salts found in urine. Passing kidney stones can be an excruciating experience, particularly when the stones are large. Getting them out early before they get too large is key to reducing much of the discomfort and risk.


Prior to the new study, virtually no one took the time to figure out what prompts a kidney stone to pass through the urinary canal, though urologists are familiar with some common triggers.

Pregnant women often pass kidney stones, the result of increased vitamin intake. Physical labor will sometimes loosen it, as will bungee jumping, bouncing on a trampoline, dirt bike riding, and even a violent sneeze. The fact is, scientists haven’t been able to isolate a single trigger—but roller coasters seem to play an important, and even reproducible, role.

“When a series of patients returned from spring break with stories of passing a kidney stone after riding the Big Thunder Mountain Railroad at Disney World in Orlando, I started to wonder if we had a unique opportunity to help patients,” Wartinger told Gizmodo. “The moment one of my students and I realized we had to move forward was hearing from a patient who rode the ride three times and after each consecutive ride he passed a stone.”

A silicon cast of a kidney. (Image: G.L. Kohuth, Michigan State University)

Wartinger and study co-author Marc Mitchell used 3D printing to create a clear silicone anatomical model of this particular male patient’s kidney. They filled the model with the patient’s urine, and placed three kidney stones of various sizes in the upper, middle, and lower passageways of the simulated kidney. After sealing the model, the researchers set off for Disney World.



With the permission of park officials,the researchers placed the model of the kidney in a backpack. Then they hopped on the Big Thunder Mountain Railroad ride, holding the kidney model between themselves at approximately the position of a real kidney to stimulate the forces that would be felt by a real person. They repeated this 20 times, collecting important data with each run. Then they repeated the experiment on Space Mountain and the Walt Disney World railroad, for a total of 60 rides.

“As far as having to ride the coaster repeatedly, honestly, the first five to six times were great,” said Wartinger.”By the end we were just gritting our teeth and wishing to be done.”

At least for this patient’s simulated kidney, the data showed that sitting in the back of Big Thunder Mountain Railroad resulted in a stone passage rate of nearly 64 percent. Front seat rides produced a passage rate of nearly 17 percent. The researchers say that powerful and random forces jarred the stone lose, guiding it through the passageway.


“A kidney looks like a tree with branches,” said Wartinger. “The forces move the stone from being positioned where a leaf is located, down through the branches and out through the trunk—and onward to the bladder. It’s not surprising that the model we used passed kidney stones on this coaster because it’s based on a gentleman that passed three stones on this exact roller coaster.”

Big Thunder Mountain Railroad at Disneyland in Orlando. (Image: CC-BY 2.0)

Wartinger believes this can be replicated, but not everyone will respond to the same ride. Like a fingerprint, each person has a unique kidney passage pattern, so everyone is going to have their own “ideal” kidney stone-jostling roller coaster ride. And for some, other activities may prove to be more effective.

The researchers believe that these findings can translate to preventive care, and be of help to three distinct groups.



“If you have a stone smaller than four millimeters it can help you pass it before it becomes obstructive or large enough to become stuck in the tube,” said Wartinger. “When stuck it may require emergency surgery and will cause extreme pain.”

Indeed, many have compared the pain of passing a large stone to natural childbirth. He says it could also help people who have a procedure that smashes a big stone into smaller stones, who can then pass the smaller fragments with the help of a thrill ride. Finally, it can help young women clear small stones before they become pregnant (it’s not advised that pregnant women ride roller coasters).

Looking ahead, the researchers would like to test more models on a range of other coasters, assuming they can get access to additional theme parks. And to make these findings truly helpful for patients, the researchers would need to conduct ultrasounds of individuals before and after each ride.


The study is also pertinent to space exploration. The effect of gravity normally helps with the passage of kidney stones, which is why so many astronauts suffer on the International Space Station. “Kidney stones will truly be a challenge for people on Mars 1,” said Wartinger.

[Journal of the American Osteopathic Association]

Rigid3D 600 Large Full Leadscrew 3D Printer

We’re sure deaconfrost would love to see what you’ve printed. Please document your print and share a Make with the community.

To post a Make simply visit this Thing again and click I Made One to start uploading your photo. It’s even easier to post a Make via the Thingiverse Mobile app (available via Google Play and Apple App Store).

Stop feeding after a couple milimiters

Hi guys,

I am a mechanical design engineer and recently I bought a UMO+.

I am having a lot of trouble with grinding of the filament.

For setting up the tension on the feeder.
I heated up the nozzle to 210C and released all the tension from the feeder.
Then, manually started to move the feeder wheel and tension up the spring until some filament was extruded.
At this point, I can see some marks on the filaments running through the bowden cable. (IDK if this is normal)

I can print some parts, without retraction, if they are under 3 hours.
I tried to print a 6 hours print today and it stop feeding after the 4th hour. No more filament coming through the feeder.
After canceling the print, with the nozzle still hot, I was able to push the filament manually like 3 mm and the filament came through the nozzle.

I appreciate any suggestions!

PS: I also have troubles when I use retraction, the filament gets grinded very soon. I believe it is related.

3D systems 3D printer

For sale is a 3D Systems cube 3 3D grey printer model 391100. Brand new and never been used. Only opened to show what is all included. Great for 3D printer first timers. Bought for $700 new last year. First $200 gets it. Ships from Houston, TX. Price includes shipping.

6 x 6 x 6″ Build Volume•70-Micron Resolution
•Dual Extruders for 2-Color Printing
•Compatible with ABS & PLA Filament
•Smart, Moisture-Lock Cartridges
•Cubify Software
•USB & Wi-Fi Printing Capability
•25 Free Designs Included
•2 Filament Cartridges Included
•Windows & Mac Compatible

The third generation Cube® 3D printer offers a new, compact design, dual color printing, a choice of 23 print colors in ABS and PLA plastics, touch-screen controls, printing direct from your mobile device and print speeds 2 times faster than other printers.

With a build size of up to 6 x 6 x 6 inches (152 x 152 x 152 mm), the Cube offers easy-to-use software on both Windows and Mac platforms that quickly processes your 3D model for its best build result and sends it wirelessly to your Cube printer for immediate printing.

This incredibly easy-to-use 3D printer is certified safe for home use, meets IEC Home Printer Certification 60953 (TUV) and is recommended for children (and adults) aged 8+. Wireless connectivity, insta-load materials cartridges, preloaded filament jets and auto-leveling of the print pad makes for an effortless and satisfying 3D printing experience every time