engineer print

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This is an “Inception Drive,” it’s based on the strain wave gear/harmonic gear.

They’re also called pure rolling transmissions.

Gearing friction is rolling, making them incredibly efficient compared to traditional transmissions, and because of well-machined teeth they’re very accurate too.

Robots need them for smooth high-torque gear reduction, but they can also be used to increase speed, reverse direction, and even go neutral to stop.

Notice how fast the green arrow rotates compared to the yellow arrow in this 3D printed drive… that’s an awesome reduction ratio.

60 seconds on...cheaper, 3D-printed prosthetics

Credit: The University of Manchester – School of MACE. A 3D-printed prototype prosthetic developed by the Manchester team.

What’s new?

A 3D-printed robotic prosthetic hand, costing £307 has been developed by a team at the University of Manchester, UK.

Who is involved?

The prosthetic was produced by final year mechanical engineering student Alexander Agboola-Dobson and his team.

How is it novel?

Advanced robotic prosthetic limbs can cost upwards of £25,000, while basic robotic hands start at £3,000. This prosthetic costs £307.

The prosthetic was created using stereolithography (SLA), a form of 3D printing, and a resin plastic. Using 3D printing allowed costs to be saved. According to Agboola-Dobson, ‘specialised dies, tools, and moulds required for injection moulding are not needed in 3D printing, massively reducing unit costs of custom manufactured components’.

Savings were also made using low-cost electronics. Instead of opting for small and powerful linear actuators to operate the prosthetic’s fingers, which are commonly used in 3D-printed prosthetics, the team used low-cost rotary servos.

To find out more see the upcoming July issue of Materials World.

it’s dec 3rd where i am already so here’s this coloured pencil scribble because that’s all i’m good for

you know how you can go to a supermarket and buy those pre-made cakes with cartoons like winnie the pooh or thomas the tank engine printed on them with the implication that they’re for children’s birthday parties? they go to the store together and buy one of those

Printed tunnels

Credit: Crossrail Ltd

The Elizabeth line, as part of the Crossrail project in London –  currently the largest construction project in Europe – will feature concrete panels made using FreeFAB, a large-scale 3D printing technology that it combines the benefits of old and new construction technology.

Using a 3D printer with a build volume of 30 x 3.5 x 1.5 metres, large moulds are printed from a specially designed wax and used to cast the panels. 

3D printing makes it easier, faster and cheaper to create complex shapes. The Crossrail project involves panels that curve along two different axis, for which a mould could take about eight days.

The use of printed wax moulds is also more environmentally friendly, as they can be melted and the re-used.

Me, in the school’s engineering facility, having access to a ton of 3-D printers that can be used to print out a multitude of different useful items and trinkets

Me: V O L T R O N

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New 3-D Printer Uses Light to Build Objects in Minutes

The next generation of desktop 3-D printers might do away with the excruciatingly slow process that current units use. Researchers have unveiled a printer that replaces the current extruder nozzle that squeezes out melted plastic one layer at a time with light and oxygen. 

The makers of the Carbon3D printer have demonstrated a technique they call continuous liquid interface production (CLIP), which grows 3-D printed parts out of a liquid resin bath. Ultraviolet light and oxygen work to build a stronger part in layers just tens of microns wide. Build times can be reduced from hours to minutes, they say.

Their work builds on the process called stereolithography, an additive manufacturing technique developed in the 1980s that builds parts layer by layer with liquid resin cured by light. 

“By rethinking the whole approach to 3-D printing, and the chemistry and physics behind the process, we have developed a new technology that can create parts radically faster than traditional technologies by essentially ‘growing’ them in a pool of liquid,” said University of North Carolina, Chapel Hill chemistry professor Joseph DeSimone, who coinvented the technique and is also Carbon3D’s CEO. See more images and learn more below.

Keep reading

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Preventing malaria isn’t enough. She’s researching a way to treat infectious diseases of the past, present and future. Inspired by Alexis Kaushansky, today’s scientist researching tomorrow’s cures.

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Geometric Desserts
Project from Dinara Kasko creates desserts using silicon cases designed with 3D software and 3D printed, all with geometric forms

A graduate from the University of Architecture and Design, Dinara worked as an architect-designer and a 3D visualizer. She liked what she was doing as an architect, but now is more interested in Patisserie.
“It just became more interesting to me at some point. From the moment I got into Patisserie I decided to try to add something new into it. I realized that the appearance is as important as taste. I tried to model my own moulds and print them with 3D printer and I liked what I got.”

Made with Instagram
Programmable materials: Hydrogels capable of complex movement created

Living organisms expand and contract soft tissues to achieve complex, 3-D movements and functions, but replicating those movements with human-made materials has proven challenging.

A University of Texas at Arlington researcher recently published groundbreaking research in Nature Communications that shows promise in finding a solution.

Keep reading

3d-printed “legos” we made in lab today - the blue one was made using fused deposition molding, the clear one with stereolithography

both were printed in runs of five, print time for each run was about an hour (not bad, especially for the stereolithographer!)

(you can still see traces of the orange polymer we used to build the supports on the first one, and the second one needs some more uv exposure to completely set and stop being sticky… post-processing is a bitch.)

classwork can be cool, sometimes :)

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A Seahorse Tail Could Inspire Better Robots, Surgical Tools

by Michael Keller

An advance in understanding why the seahorse’s tail is made of square plates could inform the next generation of robotics and armor. In an engineering study that looked at the mechanics of how the fish’s tail works, researchers found the structure’s shape is optimized to resist crushing and to grasp while bending and twisting.

An international team modeled the stresses and strains of the tail bones with a computer and 3-D printed prototypes to subject them to engineering tests. They believe that the superior resistance to compression is an adaptation to protect the fragile spinal cord that runs the length of the tail.

One of their primary questions was why evolution would select for square prisms in the seahorse skeleton when other animals that do similar things with their tails have developed cylindrical ones. Learn more and see images below.

Keep reading

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 12 . 09 . 2018 
genetic engineering notes and printed slides 
the exam is in a week and the prof hasn’t told us yet if it will be a written test or an oral examination :/