fischertechnik community forum

Hi all, I already had an ft color sensor and I ordered a second one from the same seller. This seller has semi-new fischertechnik parts from old schools stock, but she doesn't know much about the parts themselves. I noticed that the LED and the phototransistor/photodiode look different from what the...

Hi all, @Geometer, I never saw the NL Club article, but your description was clear enough. My caliper shows that the outside diameter of a standard 3 mm washer is exactly 7 mm, so I ended up with this: Hub and washer.jpg This is really a great idea, it can't slip this way. Another anti-slip option w...

Hi, A STEM company called Edventures sells some custom kits that include fischertechnik components, and they include an interesting pair of ball casters: RiQ kit.png The BOM states it includes "high quality swivels with steel balls" under the "fischertechnik" header. I'm not aware of these parts, ar...

Hi,

Wow! Really looks beautiful, great work! Looks perfectly retro to my eyes. Maybe our nice friends at ft take some ideas from this thread... Some old-fashioned stickers with the original logo would really be a great (and inexpensive) addition to any retro kit!

Warmest regards,

Rube,

Hello Holger, I'm glad you found the SVG useful. But please check again, there are no embedded JPEGs on this file whatsoever, it's 100% vector-based. As for the double-grouping, that's what Affinity Designer does when exporting. I would have also exported the logo as EPS and without the "R" mark rig...

Hello again, I'm back with a follow-up: I've given up on pneumatics for my pinball project. :o I've replaced the valves and cylinders with push-pull 6V solenoids (model JF-0530B) controlled by a simple Arduino program. The solenoids are very compact (the body measures 30 x 15 x 14 mm, so they fit pe...

Hello Harry,

Wow! These roller coasters by C. Knobloch are truly amazing, the ride video even made me a little dizzy... Of course this kind of implementation is far beyond what most people could accomplish, but awesome nonetheless... Thanks for the links!

Best regards,

Rubem

Hi everyone, Here's a really amazing miniature rollercoaster, the article says it took six months and more 800 hours of 3D printing: chrome_2021-07-09_10-08-28.png https://www.hackster.io/news/six-months-and-800-hours-of-3d-printing-went-into-this-miniature-rollercoaster-17a174e7e4c5 And the video s...

Hi everyone, I've found an interesting board for the micro:bit and I want to share it with you: chrome_2021-07-06_17-36-38.jpg The specs say: "This expansion board not only leads to 9 micro:bit onboard GPIO interfaces, but also comes with 4-way motor drives and 8 servo interfaces, of which 4-way mot...

Hi Frans, Wow. Truly amazing (again). Hats off to your accomplishments. We can see that you do use fischertechnik as a base, but you are pushing its boundaries. I also find your combination of ft with control boards, 3d printed parts, conventional hardware and sheer craftsmanship fascinating. You sh...

Hello Harald, Welcome to the discussion! The lubricant does not adhere in a way you would like it to At least this confirms my feeling that it lasts only for a while. The valves contain a solenoid, which means a coil, which means you are switching an inductive load. There should be a bypass / free-w...

Hi again! I'm almost sure the hiss comes from the solenoid valve It is interesting to note that the piston offers some resistance when moving the it back by hand, even if it is simply connected to the valve as shown below and nothing else. The hiss is also there. Interestingly, there is no extra res...

Hi Harry, here in this Forum we have got some kind of thread dedicated to pneumatic cylinder lubrication... There you find the lubricant recommended to be Paraffinum per liquidum Yes, I've read it... I'll read it again. At this point I can say I've browsed the whole forum, my "new posts" list is alw...

Hello, @Stefan, yesterday I disassembled my previously opened cylinders (both blue and Festo types) and oiled them with silicon oil again. Especially the Festo one became amazingly smooth, but after just one day I can see the oil is not so effective. Perhaps this is not the right one? The local drug...

Hi, Sounds like the cylinder is not oiled enough I once lubricated some of them with silicone oil. It kinda worked, but the oil wore out quickly and they went back to their normal state. Then I had the idea of removing the O-ring and inserting a spring, but the spring was too strong. Oh well... Stil...

Hello Stefan, Can you use a fully intact cylinder? Leakage, expected or not, is no good ;-) I did that. The blue cylinders I have are very stiff so they move slowly no matter what. That's why I removed the O-ring from one of them in the first place. This may be a problem as well as it may not be a p...

Hi again, Thanks for the check list!! My answers: 1) leaving the air reservoir away entirely: Didn't try that, I will. 2) use a larger air reservoir (one of the fischertechnik parts) and, more importantly, feed the air into the reservoir from one side and use another pin as output (not possible with...

Hi Stefan, I would say your circuit is perfectly correct and just wonder why you connected the right valve *before* instead of after the check valve. Why not put both behind it? What is the sense of the check valve? You may as well just remove it, I guess. Yes, the check valve is optional at this po...

Hello everybody, I'm back to the experiments with pneumatics for my pinball table. I feel more newbie than ever :cry: I supose I understand that a conventional circuit (e.g. from the ElectroPneumatics kit) should be like this: Conventional circuit.png (I intend to use two check valves so the air res...

Hi Stefan and H.A.R.R.Y, Simply placing four self-adhesive silicone discs under the pinball table feet reduced the noise significantly, so my conclusion is that there is nothing wrong with the compressor. My desk was just resonating and amplifying the noise. I will still experiment with foam rubber ...