3D Hangouts – Mirrors, NeoPixels and Starships

Live stream starts Wednesday, Janurary 22 2020 at 11am ET.

Learn guide, code and build photos and more
https://learn.adafruit.com/infinity-mirror/
https://youtu.be/SFuh2ApT50o

Code on Github
https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/master/ItsyBitsy_Infinity_Mirror/code.py

ItsyBitsy nRF52840
https://www.adafruit.com/product/4481

Mini Skinny NeoPixel Strip
https://www.adafruit.com/product/2970

Lipoly Backpack
https://www.adafruit.com/product/2124

500mah Battery
https://www.adafruit.com/product/1578

Slide Switch
https://www.adafruit.com/product/805

Roll of mirror film
https://www.amazon.com/gp/product/B00FQPGH8I/

Acrylic Disc
https://www.amazon.com/gp/product/B071Y55MC9/

CircuitPython Downloads: https://circuitpython.org/
https://www.youtube.com/adafruit/live #3DHangouts

3D Parts Library on GitHub
https://github.com/adafruit/Adafruit_CAD_Parts

Layer by Layer – Spheres and Cylinder Snap Fits
https://youtu.be/51pnOzYpGCA

Timelapse Tuesday:
SpaceX Starship / Super Heavy (BFR 2018) – AliShug
https://www.thingiverse.com/thing:3124443
https://youtu.be/x2uZFtHjdYs

1/22/2020 community makes:
https://www.thingiverse.com/make:753422 mario boo planter
https://www.thingiverse.com/make:752709 kingdom keyblade
https://www.thingiverse.com/make:751313 hypotrochoid card

Researchers develop 3D printed parts to fight infectious diseases

Scientists from the University of Sheffield have integrated antibacterial properties into polymer powders to create 3D printed parts capable of fighting infectious diseases. In a study published in Scientific Reports, silver-based additives were combined with PA 12 and then processed using an EOS Formiga P100 SLS system to additively manufacture antimicrobial components that were not toxic to […]

4D Printing in Singapore: Researchers Pair Compliant Mechanisms with Chitosan Biopolymers

Researchers continue to reach from the 3D realm to the next level, seeking to master the comprehensive fabrication of 4D structures. Now, a team of scientists from Singapore is exploring new ways to create flexible, programmable passive actuators, outlining their findings in the recently published ‘3D Printing of Compliant Passively Actuated 4D Structures.’

For this study, the research team paired compliant mechanisms (CM) with water-responsive chitosan biopolymers. With CM, the scientists were able to take advantage of benefits such as:

  • No hysteresis
  • Compactness
  • Ease of fabrication
  • Simplicity
  • Light weight
  • High reliability
  • Frictionless, wear-free motion

CMs are beneficial today in applications such as:

  • Implants
  • Soft robotics
  • Building structures
  • Space research
  • Micro-engineering

Previous work of chitosan based passive actuator with revolute joints

And while there is a long list of ‘pros’, CMs still offer a host of issues researchers, manufacturers, and industrial users must surpass in terms of both design and fabrication. With additive manufacturing being used in CM manufacturing, the goal is to provide the mechanical force required to spur on movement and possible deformation of the compliant part, which may respond to temperature, light, and moisture. Such products are categorized as 4D or ‘smart materials’ as they are able to respond to their environment accordingly.

Materials such as chitosan, an extremely common polymer, have been used more often with 3D printing, in examples like bioprinting neural tissue. Materials bordering on the 4D have been tested and used many times also with soft robotics, reinforced composites, and more.

Initially, a single design was created for the actuator nodes, with a ‘truss-inspired cantilever fitted with hygroscopic chitosan films.’ Chitosan biopolymers allow for the necessary deformation in this project design, as well as many applications today like textiles, cosmetics, agriculture, bioprinting, and more.

As they began working to create four compliant designs, researchers used cotton gauze to strengthen the chitosan, structuring it into thin pieces of film with a specific solution that is filtered, degassed, and then cast into molds. They put the films through another washing and drying cycle and then began experimenting with their designs, on a mission to make strides in achieving suitable and programmable shape deformation.  In their prototype, the researchers used an ‘intuitive physical’ concept as they investigated several different CM designs to meet the necessary range of motion in a variety of shapes, layer thickness, and more.

The flexure must be compliant enough to deflect 9.34 mm under the load from a
50gm test weight in order to achieve the targeted shape change

Several ‘springy’ designs were developed to spread the load for each flexure, along with allowing for better control with programmable bending in the system. Strength was evaluated also with a load test, and static non-linear structural FEM analysis.

Different springy-derivative flexural designs (a) CMD 1 (b) CMD 2 (c) CMD 3 (d) CMD 4

FEA simulation for four different CM designs (a, b, e & f) Maximum stress (c, d, g & h) Maximum deflection

3D printing of the research project’s actuator was performed on a Stratasys Fortus 450mc FDM 3D printer, using ASA—a propriety model material by Stratasys that is similar to ABS. The team spent 4.5 hours printing the part, and then it was placed in a solution to assist in removal of support materials. In testing, the researchers noted good performance from the actuator, with no signs of mechanical failure at all; however, there were still ‘significant variations from the expected results.’

3D printing of the actuator (a) Sliced model of the actuator before printing (b) Print results of CM Design 3

“The average total deformation between the two states of the actuator was calculated to be 71.2mm, measured by changes in height of the cantilevering end of the actuator. This 71.2 mm represents nearly one-third of the total actuator length, which points to the ability of the CM to accommodate a relatively large range of motion. The expected deformation from 2D simulation was 95.6mm, and so evidently the chitosan did not expand to their 12.8 % capacity as expected,” concluded the researchers.

“It is possible that even though the films lose much of their stiffness when saturated, that there was still insufficient driving force to cause significant mechanical strain of the films. One potential workaround would be to implement another tensile element to the assembly that, when added on top of the assembly’s self-weight, could encourage the full elongation of the chitosan films.”

Comparison of (a) Simulated curve of dry and wet state (b) Physical results of dry and wet state curvature

Comparison of curvature over three cycles (a) Dry state (b) Wet state

What do you think of this news? Let us know your thoughts! Join the discussion of this and other 3D printing topics at 3DPrintBoard.com.

[Source / Images: ‘3D Printing of Compliant Passively Actuated 4D Structures’]

 

The post 4D Printing in Singapore: Researchers Pair Compliant Mechanisms with Chitosan Biopolymers appeared first on 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing.

HP and NTU Singapore Officially Open Joint Corporate 3D Printing Lab

This week, Nanyang Technological University (NTU) in Singapore officially opened the doors to a new corporate lab that will help manufacturing companies as they work towards adopting digital technology. This new lab, created through a collaboration between the university and HP, will offer a digital manufacturing skills development program for Industry 4.0.

L-R: The HP-NTU Digital Manufacturing Corporate Lab was officially opened by NRF Singapore Executive Director Lim Tuang Liang; NTU Senior Vice President (Research) Prof. Lam Khin Yong; HP Inc CTO Shane Wall; and HP Inc Chief Technologist, Print, Glen Hopkins.

The facility has been dubbed the HP-NTU Digital Manufacturing Corporate Lab, and features a variety of technologies, such as supply chain models that enable faster time to market and intelligent design software tools that automate advanced customization, that will help make manufacturing operations more cost-effective, efficient, and sustainable. Members of tomorrow’s workforce can then become better equipped for work in the future manufacturing industry.

The partnership between the university, HP, and the National Research Foundation Singapore (NRF) was first announced last October, and this new facility is HP’s first university laboratory collaboration in Asia. Using the lab’s intelligent design software tools, engineers will be better able to customize and optimize the mechanical properties of their materials, while the automated technology will allow for designs that use the best combination of these properties so the resulting 3D printed parts have the necessary flexibility, strength, and weight. Then, manufacturers can rapidly scale production of custom goods even when the demand is high.

“HP’s passion for innovation, together with NTU’s world-class research capabilities, allow us to achieve new breakthroughs and unlock new solutions for both business and society,” said Shane Wall, Head of HP Labs and the company’s CTO.

One of NTU and HP’s joint goals is to recruit 100 researchers to work in the new lab, which already employs 60, in order to create new and innovative products. One current research project taking place there is focused on designing and optimizing end-to-end supply chain operations, so that manufacturers can use better business models and analytics to reduce how much time is needed to find parts that may be good candidates for fabricating with 3D printing, and also better measure their impact on the world’s carbon footprint.

This proof-of-concept project, and others, were presented at the opening of the HP-NTU Digital Manufacturing Corporate Lab, along with several technology demonstrations. Additionally, the grand opening was part of HP’s anniversary celebration of 50 years of growing its business in Singapore,

NTU Professor Tan Ming Jen and Dr. Mike Regan, co-directors of the HP-NTU Digital Manufacturing Corporate Lab, holding up 3D printed products from the HP Multi Jet Fusion 3D printer.

In conjunction with opening the new lab, NTU and HP worked together to create six SkillsFuture courses for manufacturing professionals.

“Our joint work in 3D printing, artificial intelligence (AI), machine learning, security and sustainability will produce disruptive technologies that define the future of manufacturing,” stated Wall. “Working together, we can create the workforce of the future and ensure the fourth Industrial Revolution is also a sustainable revolution.”

The skills development program will offer training in additive manufacturing and digital design under SkillsFuture, covering topics like AM fundamentals, automation, user experience, digital product designs, business models, and data management. About 120 workers each year can participate in these courses.

“The advanced technologies and automation solutions jointly developed by NTU and HP are expected to impact businesses in Singapore and beyond, as these innovations are geared towards efficiency, productivity and most importantly, sustainability,” said Professor Lam Khin Yong, NTU’s Senior Vice President of research.

“The new SkillsFuture courses developed jointly with HP also bring valuable industrial perspectives to help upskill and train a critical talent pool for Singapore.

“This will support the country’s drive towards becoming a smart nation as it faces the challenges of the fourth Industrial Revolution.”

Discuss this story and other 3D printing topics at 3DPrintBoard.com or share your thoughts below. 

[Source: The Straits Times / Images: NTU Singapore]

The post HP and NTU Singapore Officially Open Joint Corporate 3D Printing Lab appeared first on 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing.

Making a Ring With Magic Opaque Acrylic #WearableWednesday #3DPrinting @Chardane #CircuitPython

Shared on Charlyn Gonda’s Blog:

I made a ring! It’s using this special material that looks opaque but it actually lets light shine through beautifully. This was a pretty simple project, and you can do it too!

This Sparkle Ring project uses an Adafruit Gemma M0 with CircuitPython to control a Neopixel Jewel inside a laser cut ring enclosure I designed. It requires some soldering, so it’s great to practice if you’re just starting to learn.

Read more and check out charlyn on Twitter!


Flora breadboard is Every Wednesday is Wearable Wednesday here at Adafruit! We’re bringing you the blinkiest, most fashionable, innovative, and useful wearables from around the web and in our own original projects featuring our wearable Arduino-compatible platform, FLORA. Be sure to post up your wearables projects in the forums or send us a link and you might be featured here on Wearable Wednesday!

XponentialWorks and Arcimoto create 3D printed suspension for Fun Utility Vehicle

XponentialWorks, a combination of venture fund, advisory firm and product developer, has partnered with Arcimoto, an Oregon-based transportation innovator, to produce 3D print lightweight suspension components for Arcimoto’s Fun Utility Vehicle (FUV).  A rear swingarm, knuckle, upper control arm, and a brake pedal, were redesigned using ParaMatters generative design software CogniCAD. These parts were fabricated with the Eosint […]

Optical Metrology: The key to quality control in additive manufacturing

While 3D printing has been around for quite some time, it has only recently come of age as manufacturers are realizing that the technology can be used for more than just prototyping. In fact, today’s forward-thinking manufacturers are implementing 3D printing to accelerate their entire product development processes.

Designers and manufacturers now overcome fabrication limitations with 3D printing

Nowadays, 3D printing technologies can quickly produce functional and highly complex objects from hundreds of different types of materials—with none of the cutting, bending and injection limitations of traditional fabrication methods. Moreover, 3D printing applied to manufacturing can reduce total investment in machines, tools, assembly, and materials.

However, while additive manufacturing has definitely changed the way products are made and offers unprecedented versatility, inspection, and quality control issues nevertheless remain. How can quality control teams verify if objects with complex shapes are made according to original design intent, technical specifications and required norms? And while new 3D printers are designed specifically for additive manufacturing to ensure quality repeatability for long production runs, what are the solutions to mitigate defects and material waste?

This is where 3D scanners come into play. 3D scanners are a non-contact means to quickly characterize object surfaces so as to test and control part quality. Non-destructive testing using coherent light can find minuscule defects, discover when materials deviate from standard, measure and report on surface issues, and more. Unlike more manual methods, including coordinate-measuring machines, portable 3D scanners often don’t require hard setup and the part doesn’t have to go to a metrology lab.

Portable 3D scanners can find minuscule defects without requiring hard setup

The latest models gather millions of measurements in seconds, supplying the results automatically into interpretive software. The Creaform HandySCAN BLACK™|Elite, for example, features high-end cameras, blue laser technology and advanced algorithms for fast metrology-grade measurements. It is a handheld scanner, usable in any environment and on any surface. It captures 1.3 million points per second, automatically generating a 3D mesh twin of the scanned object.

High-resolution, handheld 3D scanning brings inspection to the production line. These new optical solutions introduce innovative concepts like self-positioning and dynamic referencing, which enables the measuring device to be continuously locked to the part by an optical link. Specialized accompanying software turns these millions of points into coherent 3D mesh models, easily incorporated into other software tools as required.

Combined, 3D scanning and 3D printing optimize the whole manufacturing process.

Taking 3D scanning to 3D printing makes it possible to more rapidly test for quality. Research shows QC issues will vary according to the 3D printing process in use, the amount of copies made in one production run, and more. Warping is a problem, for example, in thermoplastic products with elongated horizontal rectangular shapes but not as much for vertical shapes. Such warping is usually not found in the first part printed, but happens when the printer is used for long periods. Such issues are not simple to predict; the potential for deviation from the norm is a four-part problem of 3D printer make and model; the material in use; the specific 3D print method; and the length of the production run.

Time compression is one important reason manufacturers turn to Additive Manufacturing, so it is important the time gained using high-resolution 3D scanning isn’t lost during the subsequent inspection phase. To streamline the QC process Creaform offers its VXinspect™ software as part of 3D scanning suite. It automates the process of setting up and running a full geometric dimensioning and tolerance (GD&T) inspection. The mesh created with their 3D scanners can be compared directly against the CAD data used to create the 3D printed object.

Streamline the whole inspection process with a complete and integrated solution

The HandySCAN BLACK is ready for use in creating new quality control processes for additive manufacturing. Scanned data converted to a 3D mesh in VXinspect can be exported to a variety of leading engineering and modeling software products including various 3D Systems Geomagic solutions; InnovMetric Software PolyWorks; Dassault CATIA V5 and SOLIDWORKS; PTC Creo; Siemens NX and Solid Edge; and Autodesk Inventor, Alias, 3ds Max, and Maya. The scanner is set to calculate positioning based on reflective targets to guarantee accuracy regardless of the environment. Part size can be anywhere from 0.05 meters to 4 meters with a measurement resolution of 0.05 mm.

All traditional manufacturing processes now include built-in quality control; there are yet no commonly accepted processes for QC in additive manufacturing. The leading national and international standards agencies are working on a common set of guidelines, but the final details suitable for all additive manufacturing processes are years away. For now, digital inspection using 3D scanning allows progressive manufacturers to create internal, repeatable, and accurate inspection workflows for their additive manufacturing projects. The body of data gathered with 3D scanning will be essential in the creation of artificial intelligence deep learning algorithms, required to take quality control in additive manufacturing to the next level.

The post Optical Metrology: The key to quality control in additive manufacturing appeared first on 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing.

Researchers use injket 3D printing to create gold 3D images

In an effort to advance biomedical sensors, material scientists from the University of Seville, Spain, and the University of Nottingham have created a 3D printed image using nanoparticles of stabilized gold. As stated by the research published in Nature, gold nanoparticles themselves are not printable but provide biocompatible properties in fields such as diagnostics. For example, electrochemical […]

REVIEW: The Elegoo Mars, a hobbyist-suitable UV LCD 3D printer in a nifty package

We review the Elegoo Mars 3D printer. The Mars is a consumer-grade, desktop-sized UV LCD resin printer produced by Chinese technology start-up Elegoo. Priced at just $259, this printer delivers premium prints without a premium price tag. Marketed at hobbyists, the Mars is easily accessible for both long-time 3D printing enthusiasts and first-time users looking […]