Consider the pogo stick pressed

Consider the pogo stick pressed down with the spring fully compressed. Maybe stacking the magnets (ns-sn-ns-sn-ns) could change the felt recoil characteristics, like those double or tripple sprung units (which are already $80 + !!).

Below is a video demonstration and an animation of the Spring Polymagnet function. Theres a difference between a linear relationship and and exponential relationship. Interesting idea, but has anyone thought about the. xy|U8z=[u:{uh Well, it bottomed out and was an immensely disappointing pogo stick. I had a paintball gun that used stackable magnets as a trigger return spring, as it was very easy to configure trigger tension and feel this way. If high (such as in neodymium), a much stronger field is required to do the same thing. Lets review how springs work before exploring how magnets are different from springs. If the magnets are stored alone, they should be fine indefinitely. Heat can kill neodymium magnets, that may be the reason. If the magnet isnt magnetically hard enough the damage could be substantial. Phone: (800) 662-4638 Distance, where the energy in the spring is shown by the area under the line. The forces involved in a real pogo stick are quite powerful, pushing with many hundreds of pounds of force. Hooke's law is a principle of physics that states that the force needed to extend or compress a spring by some distance is proportional to that distance. It is mandatory to procure user consent prior to running these cookies on your website. Why? Another unique attribute of spring Polymagnets is that they dampen vibrations from one magnet to the other. By the way, just to save some pain and suffering, Earnshaw's theorem is not only proven mathematically, it is also demonstrated in reality as well. It worked well. Place cylindrical magnet around moving portion. The solution is to preload the spring. This site uses Akismet to reduce spam. A place for general potato gun questions and discussions. Add more magnets. Can we remove the spring and replace it with some powerful repelling magnets? You can extract it*, and then the magnet will need to be remagnetized. I wonder what it is that makes spring breakage a problem for some and not for others? Do they give you the performance you want where you need it? We are now required to collect sales tax in several states. But if youre thinking theres some kind of energy in magnets, that gets used up, and were then about to make the next step to perpetual motion machines via the idea that a fridge magnet can defy gravity seemingly for years without needing a power source, then no. For a pogo stick, we dont want the spring to start with zero force. (888) 582-0822, TRAMP METAL GROUP: Uh okay. harvey leibal High School Shop class told us, :E,e/E!7NhY(Ab+b_Ka|Sl^F`1*C4d>Cu6 &c/jD[=^K|]h{!v[;Atzyf}e:z1(Bm8}qd`3h:ZVhz;D8w&vm@Z'OJh6Ax;6*c^Dt9W{c/"P`d3^@55h-` g? When the field vanishes you will get a very small amount of power delivered to the load. Round Disc Rare Earth Spring Smart-Mag Raw Material (Sold in pairs), Ring Rare Earth Spring Smart-Mag Raw Material (Sold in pairs). On the other hand, when all north or south poles align together the spring is in an unstable position. Also, based on their numerous YouTube videos, they are not beyond abusing a magnet or two for the purpose of science. Interesting idea. This form collects your name, email, company name, phone number and your enquiry so that one of our team can communicate with you and provide assistance. Distance. DG Dino Baffetti Carnival II (plus accordions). My intuition suggests you would have a more controllable and positive-feel set up if, as well as the magnet under the button to repel/push it back up, you also have a magnet on the pallet board to pull it shut/keep it shut. How Does The James Webb Telescope Phone Home? A key measure of pogo stick performance is how much it shoots up into the air. Now were getting even more force, but the overall travel is less than the old coil spring. Festeezio liked DIY Beam-on-Target Fusion Particle Accelerator. Magnets are dipoles, which actually follow inverse CUBED law. How far will he shoot up when the spring is released? Check out our spring catalogue and if you have a visionary project in mind contact us so we help you design your perfect spring. This sturdy setup showed the most promise. We took a 2.938 long spring and squished it into an opening that was only 2.4. Its very weak, and doesnt start increasing until close to the end. Can it be done? It worked like any pogo stick would. I most definitely do not understand magnets at all and am full of admiration for those that do. Return to General How-To & Discussion. 0 Compress the spring 1/2, and the force should be 4 lb. Exciting Arrival: The Bruderer BSTA 500-110B, The Sustainable Benefits of Air Source Heat Pumps in Manufacturing, Recent Trends in the Manufacturing Industry, The Benefits From Upgrading to Digital Manufacturing. begali paddle keys Common sense says yes. True, but todays electric vehicles also seemed impossible a decade ago. Digital springs however are a thing. With four magnets, the fully compressed magnets are about the same height as the fully compressed coil spring. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. The two gaps in the middle look smaller than the outer gaps. By clicking Accept All, you consent to the use of ALL the cookies. That drives home the problem we face -- the repelling magnet setup doesn't have nearly as much travel as the coil spring. (not the same as the hardness of a stone with its 1-10 scale) Here hardness is a measure of how well a magnet keeps its magnetism. %PDF-1.7 % :-) ). We added a third magnet, alternating which way the polarity faces with each magnet. Interestingly all magnets used to decay fairly quickly given the state-of-the-art tech back then. No, it is not. c24 realitypod The magnets rest at a defined distance apart from each other and repel when pushed. Email: imi@magnetics.com, AUTOMATION GROUP: We also use third-party cookies that help us analyze and understand how you use this website. These Smart-Mag units hover at an equilibrium distance in space. This setup with two magnets is less than 2.8 inch-pounds (0.32 joules). The flute example that I gave shows that the theory is fine but then on a flute, the pads are push closed, rather than push open. Have you ever played with magnets as a kid and run one through the sand and watch it pick up "fuzzy stuff"? (Unfortunately very few know that.) Can Magnets Replace The Spring In A Pogo Stick? High-strength magnets are very fragile and also lose power at temperatures above 175 F. That's got to be one of the dumbest ideas I've seen in a while.

Please check our Privacy Policy to see what we'll do with your information. A pogo stick is simply a spring with a set of handles and footholds that is the subject of a great number of hilarious YouTube videos, at least one of which is impressive. Even before we jump on the pogo stick, the start position has that spring compressed by about 0.538. The title of the article asks if magnets can replace the spring in a pogo stick. Its weaker in the first 3/4 of travel, then gets stronger at the end. During this testing, we noticed that the spacing between the magnets wasnt even. Is it the start of a good pogo stick replacement? You also have the option to opt-out of these cookies. Its easy to predict.

As an example anecdote: I have four medium-sized (0.5x2), cylindrical neodymium magnets that have been doing little other than sticking to each other in a drawer for years. The cause of, and solution to, all of life's problems.. Get HUUGE Planet sized magnets. Re: "It's been my personal experience that the force actually increases over the length of compressing a coil spring.". Besides, issues such as noise, unwanted vibrations and wear are also solved with magnetic springs because they are a silent as well as profitable technology. probably increases your hit chance about as much as the gravitation between you and the bullet, magazine feed using magnets instead of springs. Also theres probably a lot of energy to recover from renegerative braking, so the net waste would be not that high. Heat the magnet above the curie temperature. We got our hands on an old coil-spring pogo stick and measured the strength of its spring. ]=ccoX,T . I agree about the issue of adjusting for playing style, but since only fairly serious players bother I think that it could be a workable solution. Hackaday Podcast 179: Danger Chess, Corona Motors, An Omni-Walker, And A Fast Talking Telescope, This Week In Security: Symbiote, Smart Locks, And CosmicStrand, Your Own Engineering Workstation, With Mame. :-) It is true that at the force between magnetic mono-poles does respect the inverse square law, there effectively is no such thing as a lone magnetic mono-pole so if you are going to think about a North mono-pole you must also think about its mated South mono-pole and of course if you are going to talk about the forces between objects you will need another pair of mono-poles to interact with. Theo "really understands" magnets (and melodeons! There is a little bit of potential energy in a magnet. We receive quite a few questions about replacing compression springs with repelling magnets. Ill admit I like my magnets too much to do much studying about what happens when you abuse them but theres lots to know and learn there. KC^qJ6(BN]FK$! Magnetic keepers (you see them mostly on old horseshoe magnets) wouldnt be necessary otherwise. Specifically, if the coercivity of a magnet is low (such as in alnico magnets), its magnetic domains can easily be realigned/scrambled by an external field. Numerical methods and computers need to be used to add up total effects between, say two 1 cm cube magnets with parallel magnetic axis. FBIlK1;s#|dMU/*%[M{v\3v~)?\ Fix Old Caps, But Keep That Can Capacitor Look, New OS For Commodore 64 Adds Modern Features, PERSEUS-9, The Dual-6502 Portable Machine That Should Have Been, Hackaday Prize 2022: Soviet Geiger Counter Gets WiFi. Otherwise you are relying on the repulsion of the under-button magnet to hold it shut when at its weakest (ie when the N and S are furthest away) . Then they took out the spring and put a few magnets where the spring should go. I just learned along the way that magnetic field follow inverse cubed relationship rather than inverse squared. (Scientists like to apply the Ising model to describe this dynamic which is appropriate for the most part. As we add more and more magnets, the thickness of the magnets limits the overall travel of the stick. Accordez-vous donc, c'est si beau, l'accordon. Not only doesnt it feel right, it doesnt perform well either. Festeezio liked Hacking DVD for Sensing 0.000000001 to 1.1 Newton. Your shop teacher was right. Do you want that inside your gun? Remember what we said about the energy being the area under the curve? If 2 magnets repel with some force, 3 is a little less, but 4 is a little more 3, but 5 is a little less than 4, etc. As we add more magnets to the stack, the maximum pull force alternates up and down.

Vibration isolation enables noise and vibration reduction with a wide range of potential applications. 93 0 obj <> endobj If you go to 2, you expect 16 lb. Hmm, yes, cost would be more for sure. How can we do this? To evaluate the strength of this two-magnet system, we simulated and experimentally measured the forces. Does their repulsive force diminish with time? We compressed a bunch of magnets in a stack, varying the number of magnets. The way they feel and perform are not the same. I think that Sandy's point is a good one. Now lets replace the spring with two repelling, 3/4" O.D. Magnets may show some use in target rifle trigger. If the magnets are pulled apart, they try to pull together. Magnets would obey the inverse square if there were magnetic monopoles. Higher speed implies a bigger motor, which in turn will consume more energy and cost much more. You are so right. When the inner poles of the inner array align with the south poles of the outer array, the magnetic spring applies zero torque and lies in a stable position. This category only includes cookies that ensures basic functionalities and security features of the website. Don't try to cheat it unless you like the idea of the vixen I just mentioned biting you. Don't know about the dirt where you guys are, but around here if you stick a magnet in the garden, it'll come out with little bits of iron ore on it. Enter the email address associated with your Amazing Magnets account. Imagine a 15 lb miniature person standing on it. Does leaving your magazine loaded really hurt the Spring, now it doesn't matter. ???? Magnets are more expensive than coil springs, but you can have them act across an air gap. If your spring application needs a tight range where the force is delivered, magnets might be great. Industrial Magnetics, Inc. - Making Things Better, Home / Mag-Mate / Smart-Mags / Spring Magnets. Here at European Springs we know how important springs are in everydays life. Magnetic springs provide high-speed motion using minimal energy, so they could be the perfect substitute for motors. Theo, what do you think? How much of a magnetic field a permanent magnet can tolerate is dependent on the material its made out of. This raises up the force even more, but its still dramatically weaker than the spring over most of the range of travel. We calculated that the force at the full 7" travel is over 500 lb! qmIwrmik]CCh6K?H@ r JEQ6r{> Y9yA If we only consider the travel between 0 and 1, the energy stored in the compressed magnets is nearly the same as the spring. 2}w(HAd=RYAAv fKG I agree Ian, I've been full time repairing sings 2004 and in that time I have replaced some Hohner springs, but I can't recall replacing a single broken spring in an Italian box. We had a number of scrap, 2" diameter RY046 ring magnets available, so that seemed like a good place to start. I'm going to guess it is a cost factor. Hohner Morgane D/G, pre-Erica Hohner in C/F and G/C. This website uses cookies to improve your experience while you navigate through the website.

114 0 obj <>stream All my other boxes still have their full complements of original springs. endstream endobj 94 0 obj <>>> endobj 95 0 obj <> endobj 96 0 obj <>/MediaBox[0 0 595 842]/Parent 91 0 R/Resources<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/XObject<>>>/Rotate 0/Type/Page>> endobj 97 0 obj <>stream This is *FAR* from simple and not at all analytical. No. Preloaded Coil Spring, Force vs. Taper cylindical magnet so that it is thinner at the top and thicker at the bottom. Electrolytes, Theyre What Dehydrated Hackaday Writers Crave! The magnet force doesnt increase in a straight line like the spring. it probably uses neodymium magnets nice but doesn't it increase the chance of getting hit if your enemy uses bullets with steel core ? hb```f``:00Xc,qN9![VZ+l&N1\ERy https://en.wikipedia.org/wiki/Magnet_keeper. Perhaps this is something to do with only using a very small amount of the springs travel pressing the button just enough to get the pallet off the board rather than attempting to shove the button down the hole! Some have higher Currie points than others (the temperature at which a magnet looses its magnetism) Physical agitation as well as heat pound at the borders and potentially fragment magnetic domains within the magnet. Spring Polymagnets behave like a magnetic spring. If the world knew just how much playing around with magnets and simulations of magnets Ive done, they would consider putting me away until they realized Im not doing anything dangerous.

Id like to point out the pogo stick was testing in a planet sized magnetic field. That said there are a lot of different kind of magnets nowadays. Highlighting the maximum forces of repelling, Click Here for our Shipping Policy Details, Induction Stove - Frying Eggs with Magnets, Does Steel Block or Improve Magnetic Strength, Sticky Business - How to Glue Neodymium Magnets. We probably should have chosen a more pro-magnet application! You will receive an e-mail indicating expected ship date once the order has been processed. Motors are the machines conventionally used to control speed: they convert the electrical energy into kinetic one to go forward and extract this kinetic energy when they need to stop. (888) 582-0821, WALKER MAGNETICS: author of DG tutor book "DG Melodeon a Crash Course for Beginners". Spring polymagnets work in pairs to simulate the functionality of a spring with compression and tension forces. You dont get that nice, gradually increasing force of the coil spring. Why Fedora Decided To Give CC0 Licensed Code The Boot, Where Pollution Hits The Road: The Growing Environmental Hazard Of Rubber Tires, The Surprisingly Manual Process Of Building Automotive Wire Harnesses, Biomimetic Surfaces: Copying Nature To Deter Bacteria And Keep Ship Hulls Smooth. Spring Polymagnets are available for purchase in the Polymagnet Catalog in a range of sizes and configurations that exhibit different attach and repel strengths and with different resting points. 0 Members and 1 Guest are viewing this topic. If a problem is worth solving, its worth solving wrongly, so more magnets were added. Ficara has added details to 125KHz tag reader and contactless lock. The force follows a simple, linear equation: The force (F) equals the spring constant (k) multiplied by the distance the spring is compressed (x).

), Some slightly un-scientific measurements (ie used TSMB's kitchen scales), Oakwood Model 4, Castagnari Dony, Castagnari Tommy, Baffetti Binci, Hohner Preciosa, Melos, Lightwave SL5 and Kala California fretless basses. Sr8xJ V}(}X e7l#zb`If!s5@1 Not so. vI Hv7P}@aIPFt3|gPAD%N|]=lV/X1Hwuc|~v[LCBm^;*>\x)lnF_mMn7n ~ ^s?[5f=MqU[O 6~v`LM1NX8#I\Xk"6Y+GkH=PJ^)LJ }L@0#qd~S8|_8O0iCdi ` # Any one out there experience this? What can we do to increase the strength, especially over a greater portion of the travel? Industrial Magnetics, Inc. Magnetic springs offer a constant force over their entire working range and they dont need electricity at all. They will rest at a defined distance apart from each other, repel when pushed together and attract when pulled apart. Spring pairs can serve as a vibration isolation device acting as an efficient low-pass filter across a range of frequencies and mass. So we come to this fascinating case of native content(amusing, veiled advertising) from a store that sells really, really powerful magnets. They act as a vibration isolation device across a range of mass and frequencies, which can be tuned for a specific application. Polymagnet is a trademark of Correlated Magnetics Research. We found that repelling magnets are very different compared to springs. To get a quick idea of what magnets could do, we built something we could stand on. What exactly would the magnets get you that a normal spring couldn't do? We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. =RCO O A simple mechanical spring from the hardware store seemed a good place to start. Hot necessarily under the button, it could be under the lever but closer to the axle, where movement is less and magnet could be smaller. (Comment Policy). Spring Polymagnets do not automatically align so they must be constrained and centered with respect to each other to perform properly. Got me thinking. 5h 1BsODI-i#' ]l);-1"4 The more magnets we add, the less travel we get in the pogo stick. (and using diamagnetic material is not cheating, you are just playing a different game outside the scope of Earnshaw's theorem), It should come as no surprise that when you look at the I-Beam in my basement ceiling in my workshop, first you see the magnets, then the I-Beam because of the level of coverage. Were not going to focus on these comparisons here. With those youll move through such a small portion of the field it will appear linear.

I don't think this would be a good idea, especially in a steel pistol. %%EOF

Easy. Spring magnets pairs are programmed to attract at a distance until they pass the zero-force transition point (a specific and engineered distance) at which point they will repel and hold position at that distance. Later we figured out how to make stronger ones and along with that strength came a special bonus. Industrial Magnetics and Making Things Better are Registered Trademarks of Industrial Magnetics, Inc. When fully compressed, the coil spring had a total energy of about 14.6 inch-pounds (1.65 joules). How did that work? Learn more. There could be interactions? Why is this so? Might make a box slower.

A 3D-printed, 1/8 Scale Model of a Pogo Stick, Preloaded Coil Spring, Force vs. Ive got a simple solution. For a pogo stick, it's pretty clear that magnets are not a good choice. We wanted to explore the differences in the behavior of springs vs. magnets. Is it possible to fit an exponential function to fit a linear function? The truth about magnets is an elusive and demanding harlot of a vixen, but *SO* very seductive, inciting you into trying all kinds of crazy things. In practicenot necessarily. hbbd```b``3@$-tL@d`*m"YH60$j@l)H h[X@m They do not have a bias to align, so they must be mechanically constrained to perform properly. Instrument Design, Construction and Repair, Topic: Magnets instead of button springs (Read 9958 times), Quote from: squeezy on March 25, 2012, 07:53:53 PM, Quote from: squeezy on March 25, 2012, 08:44:37 PM, http://www.matitflutes.com/04keywork.html, Quote from: Theo on March 25, 2012, 10:37:20 PM, SimplePortal 2.3.5 2008-2012, SimplePortal. (888) 582-0823, MAG-MATE GROUP: Emilio P.G. As with so many magnet answers, it depends. As another example: The reason you shouldnt take a stepper motor apart is because theres a very good chance that youll get the permanently magnetized stator too close to the rotor. We've seen the crazy repulsion some strong magnets can provide, why not use that? Some benefits I see would be more precise (maybe) customization of "spring rates". If your business is tax exempt, learn more. Design, Develop, And Produce Innovative Magnetic Products. . Should you use repelling magnets instead of a coil spring in your next device? So the absolute minimum number of points in any magnetic analysis is four mono-poles (two N and two S) If you double the distance between each pair, you do cut the forces between them by a quarter (assuming the distance between mated mono-poles is <<<<< the distance between magnetic pairs) but the cancelling effect from distant opposite mono-poles being further away also comes into play taking a k/(d^2) equation and more or less converting it to a k/(d^3) equation. Heat and Vibration are enemies of magnets. Learn how your comment data is processed. The very obviously have weaker and stronger points when rolled around each other, where they want to stick in specific positions, despite the fact that theyre axially magnetized and should roll freely. I have a mental bloch on the theory, but it strikes me that a "magnetic spring" involves a magnet under the button, and however small, this will add inertia to it. Theres not much force at all in the first half-inch of travel. The difference between the magnets vs. the coil spring is dramatic. We noticed something that was odd about the maximum pull force when the magnets are fully compressed.

Copyright 2007-2022 - Industrial Magnetics, Inc. - All Rights Reserved. *) For example, wrap a wire around it connected to a load. These cookies will be stored in your browser only with your consent. We constructed a small contraption that stacked them together on threaded rod, repelling with a lot of force. )* and should be listened to!

This has already been done by machines such as the 3D printer, a device that would have been thought to be impossible a few decades ago. All orders placed & paid online by 1PM ET (M-F) will be shipped the same day! firearms are generally relatively simple devices why would you want to complicate it? We really only feel the repulsion force when the magnets get close together. Im sure K&J Magnetics has a wizard there who knows a thing or two about that. Magnets arent a one-to-one replacement magnets behave differently than springs. Ficara has added a new project titled 125KHz tag reader and contactless lock. Theres also a video, you can check that out below. Emilio P.G. is it to hold to the gun or is it to do with the actual mag?

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Consider the pogo stick pressed navy blue pants women