We’d never seen an iconoscope before. And that’s reason enough to watch the quirky Japanese, first-person video of a retired broadcast engineer’s loving restoration. (Embedded below.)
Quick iconoscope primer. It was the first video camera tube, invented in the mid-20s, and used from the mid-30s to mid-40s. It worked by charging up a plate with an array of photo-sensitive capacitors, taking an exposure by allowing the capacitors to discharge according to the light hitting them, and then reading out the values with another electron scanning beam.
The video chronicles [Ozaki Yoshio]’s epic rebuild in what looks like the most amazingly well-equipped basement lab we’ve ever seen. As mentioned above, it’s quirky: the iconoscope tube itself is doing the narrating, and “my father” is [Ozaki-san], and “my brother” is another tube — that [Ozaki] found wrapped up in paper in a hibachi grill! But you don’t even have to speak Japanese to enjoy the frame build and calibration of what is probably the only working iconoscope camera in existence. You’re literally watching an old master at work, and it shows.
A Japanese lab is investing some time in the possibilities of a 5-axis 3D printer. They show it printing using five axis as well as doing finish machining on a printed part. We’ve covered parts of why this is the right direction to go for 3D printing in another post.
It looks like they have modified an existing industrial machining center for use with a 3D printing nozzle. This feels like cheating, but it’s the right way to go if you want to start playing with the code early. The machines are intensely accurate and precise. After all, building a five axis machine is a well known science, 3D printing with one opens a whole new field of research.
There isn’t too much to show in the video, other than it’s possible and people are doing it. The Five-axis 3D printing and machining is uninteresting, we have been able to machine plastic for a long time.
However, they show one blue part in which the central axis of the part was printed vertically, but revolute splines along its outer perimeter were printed normal to the surface of the already printed 3D part. Which is certainly not commonly done. Video after the break.
We’ve featured a lot of clock builds, but this one, as the title suggests, is frickin’ amazing. Talented art student [Kango Suzuki] built this Wooden Mechanical Clock (Google translation from Japanese) as a project while on his way to major in product design. There’s a better translation at this link. And be sure to check out the video of it in motion below the break.
[Kango]’s design brief was to do something that is “easy for humans to do, but difficult for machines”. Writing longhand fits the bill, although building the machine wasn’t easy for a human either — he needed six months just to plan the project.
The clock writes time in hours and minutes on a magnetic board. After each minute, the escapement mechanism sets in motion almost 400 wooden cogs, gears and cams. The board is tilted first to erase the old numbers, and then the new numbers are written using four stylii.
The clock doesn’t have any micro controllers, Arduinos, servos or any other electronics. The whole mechanism is powered via gravity using a set of four weights. [Kango] says his biggest challenge was getting the mechanism to write the numbers simultaneously. While he managed the geometry right, the cumulative distortion and flex in the hundreds of wooden parts caused the numbers to be distorted until he tuned around the error.
Akihabara, Tokyo has transformed over the years. In its present form Akihabara emerged from the ruins of a devastated Tokyo after World War 2 when the entire district was burnt to the ground. The area was rebuilt in the shadow of the Akiba Jinja (dedicated to the god of fire prevention), and a new breed of street vendors began to appear. Huddling under the protection of railway bridges, and dealing mostly in Black market radio parts, these vendors set a new tone to what would become Japan’s “Electric Town”. And as Japanese manufacturing prowess grew so too did Akihabara.
Now of course Akihabara is also home to Otaku culture, and is perhaps best known in this regard for its maid cafes. Streets are littered with maids touting their cafes, somewhat incongruously among computer outlets and precision tooling stores.
My interests however lie squarely in Akihabara’s glorious junk bins. Of all places I think I’m happiest digging through this mass of discarded technology from Japan’s manufacturing past.
A tour through the junks bins is like an archaeological dig. And in this article I will present some recent finds, and ponder on their relevance to Japanese manufacturing.
Today was the first of two days of trials at the DARPA Robotics challenge at Homestead-Miami Speedway in Florida. Created after the Japan’s Fukushima nuclear disaster, The robotics challenge is designed to advance the state of the art of robotics. The trials range from driving a car to clearing a debris field, to cutting through a wall. Robots score points based on their performance in the trials. Much of the day was spent waiting for teams to prepare their robots. There were some exciting moments however, with one challenger falling through a stacked cinder block wall.
Pictured above is Valkyrie from NASA JPL JSC. We reported on Valkyrie earlier this month. Arguably one of the better looking robots of the bunch, Valkyrie proved to be all show and no go today, failing to score any points in its day 1 trials. The day one lead went to Team Schaft, a new robot from Tokyo based startup company Schaft inc. Schaft scored 18 points in its first day. In second place is the MIT team with 12 points. Third place is currently held by Team TRACLabs with 9 points. All this can change tomorrow as the second day of trials take place. The live stream will be available from 8am to 7pm EST on DARPA’s robotics challenge page.