3D Printing News Briefs: May 30, 2019

In today’s 3D Printing News Briefs, euspen plans to hold a Special Interest Group meeting in September centered around additive manufacturing, and an adjunct professor completed a comparison between a small SLS 3D printer and a large one. Moving on to interesting 3D printing projects, an artist teamed up with Mimaki to use full-color 3D printing to make a stage prop, a reddit user created an anti-cat button for an Xbox system, and an imgur user created a modular 3D printed fashion system.

euspen to Hold Special Interest Group Meeting on AM

The European Society for Precision Engineering and Nanotechnology (euspen) will be addressing the factors which are influencing an uptake of the use of additive manufacturing as a production technology at a Special Interest Group (SIG) meeting in September. The meeting, which will be co-hosted by the American Society of Precision Engineering (ASPE), will analyze the barriers to, and the opportunities for, the adoption of AM in production. It will be held from September 16-18 at the École Centrale de Nantes in France.

At the AM SIG meeting, issues that are, as euspen put it, “critical to the viability of AM as a production technology,” will be addressed. The co-chairs of the meeting are Professor Richard Leach from the University of Nottingham and Dr. John Taylor from the University of North Carolina at Charlotte. Local hosts and the organizing committee include Professor Alain Bernard from Centrale Nantes, Dr. David Bue Pedersen from the Technical University of Denmark, Professor Leach, and Dr. Taylor.

Comparison of Small and Large SLS 3D Printers

3D printers are often used in educational settings these days. Piotr Dudek, an adjunct professor at the AGH University of Science and Technology in Poland, runs a 3D printing lab at the school that both students and researchers frequent. While many technologies are used in the lab, SLS is the one that most interests Dudek, who decided to compare a big SLS system from EOS with the smaller Sinterit Lisa.

We are using the big EOS SLS 3D printer for a long time and we wanted to compare it with Sinterit Lisa, check the possibilities of it. In SLS technology every detail matters. The temperature of the printing chamber, powder distribution system, heating or laser moving mechanism are very precise and important features. We wanted to test if Sinterit’s device is the valuable solution,” Dudek stated.

Larger 3D printers obviously have higher print volumes, but the down sides include difficult calibration, specialized training, and higher costs. In addition, it’s easy to mess up the calibration of a large 3D printer during transport. The Lisa 3D printer uses a gantry system, which comes pre-calibrated to save time, and it also uses less material, which means less money. The desktop printer is also much more student-friendly, making it the better choice for 3D printing labs like the one Professor Dudek runs.

Full-Color 3D Printed Stage Prop

A few months ago, 3DPrint.com heard from 3D printing specialist and Post Digital Artist Taketo Kobayashi, from the Ultra Modelers community, about an art exhibit in Japan that he helped organize which featured colorful, 3D printed works created on the Mimaki 3DUJ-553 full-color 3D printer. Recently, he reached out to us again with news of his latest Mimaki Engineering collaboration – a stage prop for the Japanese artist Saori Kanda, who performed with techno/trance band Shpongle at the Red Rocks Amphitheater in Colorado.

“It is a artwork,” Kobayashi told 3DPrint.com, “but also a utilization of full color 3D printing to entertainment field.”

The “Shpongle Mask,” which took 28 hours to print and mixed in Asian details, was worn onstage by Kanda as she performed her painting live with the band.

3D Printed Anti-Cat Xbox Button

reddit user Mbiggz was getting sick of their cat turning off the touch-sensitive button on the Xbox console while it was in use, which I can understand, having two cats of my own. So Mbiggz came up with the perfect solution – a 3D printed cover for the button. The design can be found on the maker’s Tinkercad account, as Mbiggz originally made the design for a Digital 3D class.

“Adhesive goes on the back part (it is labeled in the print). I’m a newcomer in terms of this so it’s not perfect,” Mbiggz wrote on Tinkercad. “Also, the door doesn’t open all the way, so you can fix it so that it does if you want to (even though it doesn’t really matter, there’s not really a need for it to open it all the way).”

3D Printed Modular Fashion System

hunter62610, a young imgur user, designed and 3D printed a Lego-like modular fabric system, which was featured in his school’s fashion show. He made two dresses that are made with a 3D printed prototype fabric pattern called Escher, which was designed to be “put together and taken apart” hundreds of times. It took him just two weeks to make the material, which the two young ladies who modeled the dresses said was fairly comfortable.

“The idea of the system is that theoretically, one could buy a fashion catalog filled with designs, and say 5000 links. Once could make every clothing item in the catalog, based on there needs. Perhaps that’s a pipe dream, but it’s a fun idea,” hunters62610 wrote.

“The Escher system is quite versatile. Each link acts like a free flowing Equilateral triangle, and has a male and female ball joint on each side. Every individual link is theoretically compatible with every other link. Special links are stored in the middle of this pouch that are really 3 merged links with a screw hole. If needed, these links can be used as elastic tie down points or buttons, if you screw in the buttons i made.”

A Makerbot Replicator Plus was used to print the fabric links in unique, small panels.

Discuss these stories and other 3D printing topics at 3DPrintBoard.com or share your thoughts in the Facebook comments below.

Make Your Own Set of 3D Printed Egg Speakers For Less Than $150

Heine Nielsen, a 37-year-old maker from Denmark who goes by the name dr_frost_dk on Thingiverse, is always up for trying out “totally untested” projects. After spending two decades building amps and speakers, Nielsen decided to try out 3D printing last year and see if it would be a good way to make an enclosure for audio speakers.

We’ve definitely seen plenty of 3D printed speakers before, along with headphones, earbuds, and other audio equipment, like CD players and mics. After Nielsen saw how strong some of the 3D printed parts were that his friend had made, he was inspired to give it a shot with a fun pair of 3D printed audiophile egg speakers. He told 3DPrint.com that he has been developing this project “for about a year.”

In an article for Make: in its Projects section, Nielsen explained that this easy DIY project, which does require basic soldering skills, only takes 1-3 hours and $51-$150 to complete.

Heine Nielsen

“The result: A pair of good-looking speakers that truly sound great, with no sharp corners to impede airflow inside the cabinet. The “egg” has always been one of the holy grails of cabinets in the hi-fi world, but they’re hard to make in a conventional way. Now it’s much easier with 3D printing,” Nielsen wrote.

“I learned a lot about using infill settings to create an air gap between the inner and outer walls. This helps a lot — instead of just having solid plastic, the air gap dampens the pressure from inside, so the outer wall has less resonance. Material and wall thickness have the biggest effect on holding in the sound pressure, so you get more sound pressure in the listening room.

“It’s been a long process in getting the ratios “right” but I’m so amazed at the sound coming from such small speakers.”

You can find STL files for 3″, 4″, and 5″ egg speakers on Nielsen’s Thingiverse. The directions for the project vary a little, depending on which size you go with.

In the article, Nielsen explains step by step how to complete this project, starting with cleaning up your 3D printed egg speakers “so they look their best” and then drilling two 5 mm holes in the back of the egg for the speaker wire connection.

“It’s tricky to print these so they fit perfectly,” Nielsen said about why the eggs weren’t 3D printed with the holes already added.

Next, 3.5 mm threads need to be tapped for the speaker mounting holes, so the plastic won’t separate when the speakers are screwed in. MDM-5 foam should be placed around the speaker hole, while 10 mm foam should go behind the bass port.

You’ll need to solder two female gold bullet connectors to one end of the speaker cable, then glue them into the back of the egg from the inside – just be careful not to mix up the polarity.

“This step is a bit fiddly, so do some dry runs,” Nielsen said.

Once you’ve connected your speaker to the bare end of the wire, put on the ring and screw it in, before gluing the feet, which Nielsen 3D printed out of Ninjaflex, to the bottom of the enclosure.

Then, you will repeat the entire process for the second speaker. Once both speakers are finished, connect them to an amplifier and enjoy!

“I’m very happy with the result — it sounds better than any other cabinet I’ve ever had in this size,” Nielsen said.

His original low-poly model had a little difficulty with even wall infill-thickness, so he created a high-poly model as well.

Nielsen said, “For my next build I’m printing these transparent, and adding WS2812B LEDs so they’ll fill the room with sound and also with every kind of light and color pattern you can think of!”

What do you think of this project? Will you try it yourself? Discuss this and other 3D printing topics at 3DPrintBoard.com or share your thoughts below.