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Erik de Bruijn
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1,490 followers
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Interesting comparisons between several manufacturing techniques and their environmental/economic impacts by OECD.

1. The report claims CNC machining will be offset by a large degree by 3D Printing due to efficiency. They do seem to factor in the size of parts, which can have a major impact on whether additive versus subtractive is more cost-effective.
2. For injection moulding the desktop FFF/FDM are very close, but industrial FDM is much more energy intensive compared to injection moulding.
3. The report also mentions other nice implications on startups in developed and developing countries alike.

It's also nice and balanced to brush aside some myths about "elimination of waste" by 3D printing locally.

Full article here: http://www.keepeek.com/Digital-Asset-Management/oecd/science-and-technology/the-next-production-revolution_9789264271036-en#page188

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Energy independence-day! 🌞

Yesterday I helped my friend Paul with installing solar panels. This is something most people with some DIY skills are able to do. It cuts the earn-back time with about one year, because the panels themselves aren't that expensive anymore these days. So it's mostly the cost of the labour. And it's really fun to do and a good work-out.

The heaviest part is getting "dead weight" (slabs) on to the roof to prevent the panels from moving during extreme weather.

We also learned a few things, especially that lifting these panels two stories isn't trivial unless you figure out a controlled way to do it. We ended up basically pulling them up along the ladder as a guide. This was through a loop, you you'd each pull a quarter of the weight for 4 stories of rope length. The ladder has three sections which gave the panel 3 stories including the floor if we needed to lower it again for some reason.

The other thing is it's easy to get dehydrated on a sunny roof. Which makes working there dangerous. First thing to get up there is not tools, but water.

The mechanical stuff is way easier than IKEA furniture and you can very easily work on a flat rooftop. The most work is preparing the surface and aligning the bits.

Anyway, a great way to spend a Sunday with a friend!
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14-08-17
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Poor Mercedes from asking a question on Twitter and got a bitter reality check. They should probably have better monitored to which other brand their customers had already switched...

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Interesting, grabbed this data off of https://coin.dance and added a column the percent change to annual percentage revenue (APR). Interestingly, Bitcoin's worst growth during these intervals was 443% annually! That recent APRs in such charts are high is to be expected (there's a bias to talk about Bitcoin RoI when it's up) and shorter periods do have the greatest variance, however you can't deny that over the long term it has proven to be a really good investment for many years now. The growth may slowing down a bit, though, so I'm really glad I got in relatively early (I bought my first few Bitcoins in 2013, so I got a really nice RoI). Of course there are no guarantees in Bitcoin and nobody in their right mind invests all their savings into it (I hope). But it's definitely an investment category you don't want to overlook.
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07-08-17
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The tests in May were going up to 112 km/h (70 MPH). Now, it's up to 310 km/h (200 MPH)!

Elon's target is to reach 1223 km/h or 7600 MPH. Similar speeds to an airplane, however it could reach this speeds much sooner after departure and also decelerate faster. This means that short trips will be faster than airplanes, even discounting the fact that hyperloops could function more like catching a subway system but over much larger distances. Lots of pods leaving very frequently, instead of large cabins leaving a few times each day.

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Star Trek, Chronicles of Narnia and Love Actually have one thing in common: snow! At Snow Business International Ltd they use their in-house Ultimaker printers for prototyping, functional testing, and creating final parts for the snow machines which will create the best winter landscapes in the film and TV industry.

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Printing objects in grayscale with an Ultimaker 3 is now possible thanks to an innovative technique based on the principle of halftoning. Developed in collaboration with the Delft University of Technology, this process enables a user to print an object with varying tones using only two colors. Read on to discover how to do it!

https://ultimaker.com/en/blog/49783-3d-hatching-grayscale-printing-on-the-ultimaker-3

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Thanks everyone who shares on YouMagine!

+YouMagine ranks #1 for 3D printable content in this article. The article differentiates between 3D modelling for various purposes, among which 3D printing.

https://all3dp.com/1/free-3d-model-free-download-archive-3d-models/

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Superfeet, +Jabil Blue Sky and Radius apply +Ultimaker 3D printing to improve people's lives.
https://youtu.be/xzqazRJnc-8
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