The list consists of 4 parts: Part 1: Transmission of continuous rotation Part 2: Other kinds of motion transmission Part 3: Mechanisms of specific purposes Part 4: Mechanisms for various industries
Autodesk Inventor is used to create all videos in this channel. Author Information: Name: Nguyen Duc Thang Birth year: 1946 in Hue City, Vietnam Mechanical engineer, 1969, Hanoi University of Technology Doctor of Engineering, 1984, Kosice University of Technology, Slovakia Job history: - Designer of small mechanical engineering enterprises in Hanoi. - Retirement in 2002. Contact Email: thang010146@gmail.com
This is very impressive! Does this mechanism work with summing both angles while both X and Y are rotating? What if they are rotating in different directions? I'm thinking of the possibilities for using it to run a wheel at a sum of two velocities.
Thank you very much! This exact mechanism in this way solves a problem I've had with a personal project of mine for months. You've done a great service to me! How many teeth do the yellow Y gear and the orange S gear have? (i.e. what's the ratio between the two?)
Its a neat design but weight & vibration will be an issue. The hardware for the folding arms will add up the weight. The large top & bottom panels are heavy too. The flight controllers are very sensitive to vibrations & oscillations. Motor arms need to be stiff otherwise the motor PID loop will start overheating the motors & burn. These arms look like they could be stable enough, but its something most dont think about
The pid problem might be relevant for a freestyle drone, but it’s not a hard rule. The tradeoff would be a reduction of max rates, with the control loop having a cutoff or notch where the vibrations would be.
@@float32 pid is always an issue. Even for a tripod in the sky, its constantly adjusting its own virtual "joysticks" to maintain a position hold. If the vibrations cause oscillations it can overheat even if its in a position hold. The individual motors will be revving up and down too quickly for the motors to handle
Perhaps the heavy panels can be printed such that they have internal lightening holes? Say as it’s printing along it makes and internal empty “bubble”? That could definitely lower the weight.
@@terminsane it’s not always an issue. You set the control loop bandwidth so it doesn’t oscillate. There’s post ID tuning, and why bode plots have been used for almost 100 years now. Pid loops are literally tech from the *steam* era. They can work just fine with less than rigid things, with trade offs in bandwidth.
At least he can model. It will take him less time to delete 2 of the blades, draw a diagonal line, and mirror the other 2 than it took you to type that response. The actuator concept is what's important, not the physics of stable flight.
A single servo should be able to twist it. But weight will be a never ending battle in this design, due to the prop size limitation, and the size & weight of the craft. This is a really pretty design but not practical imo
no hate to you but umbrellas are unbelievably unreliable i wonder how rich i can get by making a more reliable umbrella design (wihtout any engineering expertise of course) amazing animation btw <3
1. How the mechanism is released after reaching the top? Please read the video description: “The black springs always force the pink pawls toward the beige racks. At the highest position of the table, thanks to the highest teeth of the racks, the flat springs begin to prevent the pawls from contacting the racks. At the lowest position of the table, the S red stoppers raise the flat springs to release the pawls.” 2. How prevent it going above the max limit? A fixed stopper should be installed on the table leg to prevent the table from being raised too high. My bad.
Hello, I would like to have details on the articulation of the safety railing if this is possible because I would like to make your staircase model! Congratulations to everyone for this achievement! Sincerely
Thank you for your information. Can you show me a video or pictures of the screw telescopic actuator? I have never seen it. My email: thang010146@gmail.com
Great one. Specially i will say this is a great example of bigger thread comes with more pitch and smaller thread comes with shorter one. So per rev the outer telescopic parts or nuts gets its different speed. Am i right?
Please refer to the video description: "The first and second screw-nut drives have leads of L1 and L2 mm of the same hand. If the input screw rotates N revolutions, the pink slider performs a displacement of N*(L1+L2) mm."
The choice of cutting plane makes the orange screw look internally threaded (it was actually part of the spline). That was very confusing to me because it should bind.
Thanks Nguyen for this great channel. I really enjoy every single mechanism and also refer them to my students for some designs and capstones. Your designs recall me my most favorite tech book, Artobolevsky Mechanisms - I still have an original set at home for 30 years!
URGENT QUESTION!!!! I am making a bin which crushes plastic bottles- which press would be best suitable and provide enough force to crush the bottles. KEEP IN MIND THT A CRUSHING PLATE NEEDS TO ATTACH TO IT, AS THE mechanism needs to move the CRUHSING PLATE UP AND DOWN IN ORDER TO CRUSH THE plastic bottles
Links to download CAD files of this video have been added to the video description recently. Use RU-vid's Super Thanks feature to support my RU-vid channel if you can.
Use screw drives shown on pages 143 - 144, Part 2 of my book: 3200 ANIMATED MECHANICAL MECHANISMS www.mediafire.com/file/muio0i3hyvnhtj6/3200AMMe.zip/file
La cadena esta enganchada con un pin este se desliza por la ruta de la cadena cuando esta se mueve. Durante el desplazamiento horizontal la guia se mantiene en una posicion y se eleva cusndo pasa a un movimiento vertical . Cuando se desplaza verticalmente hay torque, para contrarestarlo la guia tiene un pasador largo que se desliza en una corredera. Ese torque genera fatiga de materiales a menos que la carga no sea significativa.
Yes. Please see ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-giY0BaeX_JA.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-LefhdeZEjUw.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-YCNXa3aHhoc.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-m50spRgVHY4.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mOy9-S-pSQo.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-So9PgIDWI6I.html Each design has its pros and cons.
