Messages

31

The Bike Shop / Re: 3D printed titanium parts

« on: March 04, 2016, 05:09:09 AM »

Laser-etched bicycle frames repel water and mud
https://www.eta.co.uk/2015/01/27/laser-etched-bicycle-frames-repel-water-mud/
http://www.rochester.edu/newscenter/superhydrophobic-metals-85592/
27th January 2015

Surface patterning by laser interference processing
http://www.iws.fraunhofer.de/en/business_fields/ablation_cutting/surface_functionalization/equipment.html
http://www.intechopen.com/books/implant-dentistry-a-rapidly-evolving-practice/factors-affecting-the-success-of-dental-implants


Laser processing creates 'super-hydrophobic' metals
26 Jan 2015
http://optics.org/news/6/1/33
Laser-etched metal 'bounces' water  21 January 2015 
http://www.bbc.com/news/science-environment-30915266


World's smallest 3D printed Matterhorn reveals practical uses of nanoscale 3D printing
Feb. 15, 2016
http://www.3ders.org/articles/20160215-worlds-smallest-3d-printed-matterhorn-reveals-practical-uses-of-nanoscale-3d-printing.html

The objective of the research was not merely to show off how small a mountain could be 3D printed, but to demonstrate that these nanoscale 3D printed objects can in fact in mass-produced. This is an important finding, as large numbers of microscopic 3D structures—which, when found in nature, often exhibit special properties—could be used to improve industrial machine manufacturing.

Each 3D printed Matterhorn model is only around seven hundredths of a millimeter, making its height less than the thickness of a sheet of paper. Image via PSI.

For instance, Helmut Schift, leader of the research project at PSI, provides the example of a snake. “Many species of snakes are able to glide over sand without significantly wearing down their skin,” he explained. This is because the snake’s skin is covered in scales and ridges measuring just a few thousandths of a millimeter high. These 3D structures reduce friction in one direction, protecting the snake even if it is traversing rugged ground.

“One could imagine furnishing machine parts that are exposed to powerful stresses through friction with a similarly structured surface,” continued Schift. Covering a machine part—or perhaps even a vehicle, or body armor—in nanoscale 3D printed structures would thereby minimize its wear and tear and extend its lifespan.

Colorless ink produces multiple colors when printed
February 16, 2016
http://www.gizmag.com/colorless-ink/41865/

An image of a squirrel, printed on a thin film using the new ink

While most of us may not give much thought to the dyes used in color inks, they are in fact often quite toxic. That's why scientists at Russia's ITMO University have developed a more eco-friendly alternative – a non-toxic ink that produces different colors by altering the nanostructure of the material to which it's applied.

Such "nanostructure inks" work in a manner similar to certain surfaces found in nature, including butterfly wings – they reflect light in such a way that the light frequencies interfere with one another, causing the surface to appear to be a given color.

compare that stuff to how easy it is/literally any basic description of how to anodize titanium/how it's just perceived coloring...




Laser shock peening improves fatigue and durability of aircraft structures
05/22/2015
http://www.industrial-lasers.com/articles/2015/05/laser-shock-peening-improves-fatigue-and-durability-of-aircraft-structures.html
http://www.theengineer.co.uk/aerospace/news/new-technique-paves-the-way-for-3d-printed-aircraft-wings/1016759.article




remember primo sprockets marketed as stronger/longer-wearing for having a shot-peened finish?  what if you could shot peen every layer?  what if you could shot peen and color each layer?

also

Belgian artist Frederik De Wilde has worked with Melotte, a Belgian 3D printing company and NASA to 3D print a titanium sculpture, coated with graphene
http://www.youtube.com/watch?v=WX4ldIj1JNI
Jan.14, 2014

In collaboration with the Rice University, Texas De Wilde made a substance that absorbs nearly all light that falls onto the material. He made a piece of art called 'Hostage' that is 144 times blacker than black.

During his research, De Wilde contacted the U.S. space agency NASA. Unexpectedly, he was given accesses to the laboratories of NASA, where he works with Melotte, the 3D printing company located in Zonhoven. This time his work went further with the 3D printed sculpture 'M1ne #1', with NASA and Melotte's technology involved. The 'M1ne #1' is based on geological data from Limburg. Melotte Zonhoven translated 2D plans of the mine to a complex, print-ready 3D model, and then printed it out in titanium. It was coated in a specific way with carbon nanotubes consisting of graphene using NASA's technology.

The sculpture is an example of optical illusion: it is a 3D structure but you have the illusion of 2D because there is no reflection. It is so deep black that it seems that you are looking into a black hole...

^invisible spaceships

32

The Bike Shop / Re: 3D printed titanium parts

« on: March 03, 2016, 08:01:31 PM »

Not titanium, but 3D printed, and really cool. http://hackaday.com/2016/01/11/3d-printed-tourbillon-clock/ shows a 3d printed Tourbillon Clock, I found it really impressive

here's a partially-ti one for only $143,000
http://quillandpad.com/2016/02/29/prediction-comes-true-panerai-lo-scienziato-luminor-1950-tourbillon-gmt-titanium-with-dmls-3d-printed-titanium-case/
http://www.panerai.com/en-us/collections/special-editions/2016/lo-scienziato---luminor-1950-tourbillon-gmt-titanio---47mm_pam00578.html



Gorgeous new Moots Vamoots Disc RSL road bike with 3D printed titanium dropouts & more!
http://www.bikerumor.com/2016/02/26/nahbs-2016-gorgeous-new-moots-vamoots-disc-rsl-road-bike-with-3d-printed-titanium-dropouts/

February 26, 2016



...The new Vamoots Disc RSL borrows the front end of the rim brake model and adds an entirely new rear end with 3D printed dropouts. The parts, which have been in development since May 2015, are being made by I2M in the UK. It uses the flat mount disc brake standard with 142×12 thru axles. What’s striking is how smooth the design is.



While the main frame is internally butted 3/2.5 titanium, the dropouts are 6/4 powder. Why make them this way? Because, Moots says, it would take so long to machine a piece to their specs, it would be more expensive. The 3D printed parts are also lighter, and it gives them this smooth, sculpted aesthetic you’ couldn’t get from traditional metalworking.



An almost final version is shown here, and they expect to start shipping the bikes by June 2016.



The printing also allows them to easily create channels for Di2 wiring. The lower half’s end has a male design that inserts into the chainstay.



The upper side has a rounded profile that lets them attach the seat tube at varying angles depending on frame size. They’ll make two different size dropouts to cover the full range of frame sizes...

Winter Training Bike
http://www.2016.handmadebicycleshow.com/exhibitors/exhibitor-bike/2016/02/01/winter-training-bike-metier-velo/
http://www.métier-vélo.com/blog

2/29/2016
 
The Métier Vélo Winter Training Bike is a disc brake road bicycle with clearance for 33mm tubular tires.  The relatively short 420mm chainstay, 73˚ seat and head tube angles, and stiff tubes provide a responsive ride.  Seventy millimeters of bottom bracket drop and 48mm of fork rake give a stability on long, rough descents.  Cosmetics are printed directly into the lugs or bonded to the frame. The Black-Ti finish of marine vanish and wax protects the carbon composite from UV and  is easily refreshed. Displayed at NAHBS 2016!

Frame features 3D-printed 6/4 titanium lugs ...

^ looks like the harpoon/noodle chute on a cone snail
https://www.youtube.com/watch?v=4wihKnARrAw
https://www.youtube.com/watch?v=JjHMGSI_h0Q

33

The Bike Shop / Re: 3D printed titanium parts

« on: February 28, 2016, 03:21:28 AM »

3D-printed titanium offers new possibilities for bike builders
    February 26, 2016
http://www.gizmag.com/bastion-cycles-3d-printed-titanium-bike/42066/









LOTS of info and detailed pictures/testing http://pencerw.com/feed





I took care of a macaw like this for a few years, and giving him a ti beak just seems terrifying

34

The Lounge / Re: EU Referendum

« on: February 24, 2016, 05:42:22 PM »

it's a joke to pull the wool over for TPP.

racist bigot fascist nazi! how dare you?! say it again and we'll burn your property/destroy your family!

parody thread option; Muslim Brotherhood Referendum . . .

35

The Bike Shop / Re: GT Bars?

« on: February 24, 2016, 03:43:39 PM »

it's actually a quamen g86/bottleopener frame with Standard strip bars and a snafu knobjob + an ody elmsteet

I'd be happy to take those hoffman bars off your hands...lol

check bmxmuseum, you should still be able to pick some up for ~$45

36

The Bike Shop / Re: GT Bars?

« on: February 24, 2016, 06:05:51 AM »

yeah they're 2015 hoffmans. 

I like those quests... never seen them before. I think george made some that looked kind of like those at one point?  They do look a lot like bars in dmfbmx2, which was the reason I got the hoffmans - because they looked like modern mirra bars, and I figured since they were hoffman they were technically modern pre-mirras...   I feel weird about them now. also, not enough sweep for my liking

37

The Bike Shop / Re: GT Bars?

« on: February 24, 2016, 04:02:03 AM »

the scerbars feel the closest to regular modern 2piece bars, and I think most of the new giant copies look ridiculous, but I cringe reading the drama stuff and feel like bob should just let it slide and then re-re-re-release 'his own' again in 12 years

38

The Bike Shop / Re: Remember how a few arm-chair engineers called this out? Well who'd a thunk it..

« on: February 18, 2016, 10:13:00 PM »

This is a public forum, anyone could rebut him if they had a leg to stand on

this is why I built my ratchet up to an alienation rim

39

The Bike Shop / Re: Euro commuter cycling culture

« on: February 09, 2016, 03:21:53 PM »

40

The Bike Shop / Re: 3D printed titanium parts

« on: February 04, 2016, 03:51:36 PM »

they were bunnyhop/big james' from the blue6 website.  if it's not still up you could probably find them archived




also, polished herpes

Robotic welding arm used to 3D print a stainless steel bike
http://www.gizmag.com/stainless-steel-3d-printed-arc-bicycle/41649/

    February 3, 2016

...Its frame was built in several main sections, which were then welded to one another by hand.

Called the Arc Bicycle, the finished product is claimed to weigh about as much as a traditional steel-framed bike, and is fully capable of being ridden on rough cobblestone streets.

"It was important for us to design a functional object that people use everyday," says team member Stef de Groot. "Being students in the Netherlands, a bicycle naturally came to mind. A bicycle frame is a good test for the technology because of the complex forces involved."

https://www.youtube.com/watch?v=Pa4m9JwGzlA

Arc Bicycle | 3D-Printing stainless steel
Published on Feb 3, 2016
A student team from TU Delft in the Netherlands designed and produced a fully functional 3D printed stainless steel bicycle. The students achieved the goal of their three-month project by printing the frame with the help of MX3D in Amsterdam. The Arc Bicycle is the first ever 3D printed metal bicycle to be produced using a welding process.

and

41

The Bike Shop / Re: Remember how a few arm-chair engineers called this out? Well who'd a thunk it..

« on: February 02, 2016, 02:37:58 PM »

remember the 'oversized' 7/8 or 22mm profile SS styled wtp cranks from around 2000-2004, which broke so frequently that even magazine reviewers acknowledged it...

my first time being scammed by a bmxer was for a set of those cranks. 

the 'design' was fine - 48 spline/beefy tubular arms - but they made them wrong/not strong enough. 
wombolts were also 'made wrong' until things got sorted out. Things actually got sorted out, over a relatively short period.

now wtp/eclat cranks went back to a decades-old spline system and not only didn't fix it, but made it worse by splitting the spindle...
odyssey at least kept fixing/upgrading theirs until they had something that works. They weren't just trying to sell a worsened old system, they were developing a new [arguably] improved one...

42

The Bike Shop / Re: 3D printed titanium parts

« on: January 28, 2016, 04:23:45 AM »

been finding lots of stem stuff lately... when are we going to start seeing pedals?


http://consult3d.com/blog

43

The Bike Shop / Re: 3D printed titanium parts

« on: January 27, 2016, 12:44:18 AM »

one of the things I've wanted to see for a while now is something that can print/deposit metal, while coloring it at the same time. eventually it should be just as controllable/detailed as anything with pixels, like high-def anodizing, better than screenprinting...

http://3dprintingindustry.com/2016/01/12/metal-3d-printing-why-you-might-move-to-taiwan-part-6/

January 12, 2016

...ITRI has also developed a monitoring process for what they hope will one day lead to active feedback during the printing process. Currently, manufacturers of just about every metal printing system (potentially excluding the MetalFAB1 from Additive Industries, but we’ll see) are only building towards a closed-loop for quality control, implementing sensors and software to tightly regulate the print process, but still relying heavily on trial and error. So, while ensuring that the printed part matches the specifications of the designed model is possible, it often involves adjusting the printing parameters over and over until repeatability is achieved.

ITRI is also working on its Optical Engine for Material Grain Microstructure-Controlling AM Technology and developing hardware and software for controlling the microstructure of printed parts, so as to manipulate the physical properties at different points throughout a component. Dr. Ji-Bin Horng, Senior Principal Engineer of the Laser and Additive Manufacturing Technology Center, explains, “We are studying the use of laser for micromaterial processing for possible applications in various industries. For instance, we can imprint in such a way as to generate heterogeneous microstructures. Take an aluminum part, for example. We can change the material properties, so that, near the center, we can enhance the hardness of the part. And, along the perimeter, we can enhance its ductility against high temperature fatigue. For this technology, this year, we were among the 19 finalists of the 2015 R&D 100 award for process/prototyping.”

In a separate machine, the team was able to implement the femtosecond laser technology for a variety of surface finishing techniques that were truly impressive. Dr. Horng holds up a business card holder with colored details on its face.


 “We used a femtosecond and nanosecond laser on this substrate to generate many different colors,” he says. “Then, we use a 3D printer to generate these 3D characters. We use the microstructure to cause different patterns of diffraction, controlling how it diffracts the light, to create different colors. We can use our lasers to create different surface finishing to generate many different colors.”

When I asked if this same laser technology could be used to remove prints from their substrates, as well as clean prints as a part of post-processing, he responded with a confident “Yes,” adding, “We can even use our laser technology to polish parts.” He was quick to point out that this was an entirely separate machine from the 3D printers they’d made, but Tzong-Ming Wu believed that it was feasible to combine the two technologies, some day, so that the printer could create a layer, then polish that layer, and so on, to create an even more accurate form of hybrid manufacturing...

http://www.medicalplasticsnews.com/downloads/89/download/Fraunhofer%20Laser%20Polishing640x480.jpg?cb=6126ddc97cfccadbc40cc1134acf283d
http://www.medicalplasticsnews.com/technology/fraunhofer-ilt-perfects-fast-laser-polishing-of-titanium-implants/

...laser polishing is 30 to 40 times faster than manual polishing...

...Unlike in conventional processes, the edges are not rounded off when polished with lasers, thus guaranteeing a high geometrical accuracy of the component. Another advantage of laser polishing lies in its far cleaner and more environmentally friendly process. In contrast to manual polishing, no polishing or abrasive materials are used, leaving no chemical residues...

not theirs, but related;



I've seen better ones but I don't feel like finding them.

44

The Lounge / Re: currently salmon is worth more than crude oil

« on: January 26, 2016, 07:25:25 PM »

What town do you live in?

fairbanks. the earthquake was further south

http://www.newsminer.com/news/alaska_news/kenai-families-lose-homes-in-earthquake/article_020d7b3c-c3b6-11e5-8a64-c7fe2f03d6cd.html

KENAI, Alaska - Vincent Calderon and Carrie Gaethle had just gotten their two children back to bed after being shaken awake by a 7.1 magnitude tremor that rocked the Kenai Peninsula Sunday morning when their house exploded into a mass of blue flames.

"As soon as we got the kids back to sleep, probably about 15, 20 minutes after the earthquake ... it felt like we came a foot off the ground," Calderon said. "The back wall flew off the house, the floors blew off."

..The couple's house on Lilac Lane in Kenai was the first of two that were destroyed by gas explosions and one of four that ended up being burnt to the ground following the earthquake and a gas leak in the area.

The only other thing I'll add is that electricity goes out, especially in rural areas with bad weather (aka Alaska) and then you're running a gas generator to power that electric heater.  Power goes out with a wood stove you're still in business.

bingo

There have been more/longer winter power outages in just the past 3 years than in the 15 I've lived here.  Not having a woodstove means frozen/burst waterlines and dead people.

45

The Lounge / Re: currently salmon is worth more than crude oil

« on: January 26, 2016, 06:11:45 PM »

Salmon is delicious.

I disagree so hard...

Just because it's clean and easy at your house doesn't mean it's a clean fuel. Compare that to someone who owns their land, cuts and seasons their own lumber, replants lumber (which actually adds something), and warms their own home for free.

THIS

also, there was a 7.something earthquake the other night and  ~4 homes burnt down because of the ruptured gas lines, which they were forced to accept/pay for whether they wanted them installed or not.

Even at their best estimates, the natural gas, when it eventually is all installed/available, is still going to cost more than everything else.  People still have to convert/adapt their homes. They're encroaching on/destroying peoples' properties to bury the pipe, raising taxes, and forcing a more expensive system up our asses, before they even have the logistics settled on, and it's going to be very expensive, and a very negative/destructive experience for a lot of people...


lol tinfoil hat though, right...