on't see any benefit for recoil

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I don't see any benefit for recoil spring replacement, but I've had them in paintball gun trigger return, interesting feel, I liked it. endstream endobj 98 0 obj <>stream 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. Interestingly all magnets used to decay fairly quickly given the state-of-the-art tech back then. Ive got a simple solution. 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. Magnets would obey the inverse square if there were magnetic monopoles.

What exactly would the magnets get you that a normal spring couldn't do? qmIwrmik]CCh6K?H@ r JEQ6r{> Y9yA

Learn how your comment data is processed. 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. We noticed something that was odd about the maximum pull force when the magnets are fully compressed. would they demagnetise with age and/or use or if doing nothing for long periods or do they keep their "charge" or whatever its called indefinately?? Each magnet repels any adjacent magnets. Place cylindrical magnet around moving portion. Yeah. 2}w(HAd=RYAAv fKG Vibration isolation enables noise and vibration reduction with a wide range of potential applications. Magnets arent a one-to-one replacement magnets behave differently than springs. ]=ccoX,T . Heat the magnet above the curie temperature.

Its easy to predict. I'm going to guess it is a cost factor. No. This sturdy setup showed the most promise.

Local: (231) 582-3100 93 0 obj <> endobj You dont get that nice, gradually increasing force of the coil spring. Theo, what do you think? No, it is not. i dont get it what dose he need the magnets for? author of DG tutor book "DG Melodeon a Crash Course for Beginners".

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. Common sense says yes. The more magnets we add, the less travel we get in the pogo stick.

Does Library Bloat Make Your Smartphone App Look Fat? Industrial Magnetics, Inc. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. In over 50 years of playing a veriety of boxes I have never broke a spring so reliability does not seem to be a problem for me anyway. A 3D-printed, 1/8 Scale Model of a Pogo Stick, Preloaded Coil Spring, Force vs.

Does their repulsive force diminish with time?

FBIlK1;s#|dMU/*%[M{v\3v~)?\ If the magnets are pulled apart, they try to pull together. Phone: (800) 662-4638 Are permanent magnets really permanent? 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. The difference between the magnets vs. the coil spring is dramatic. Magnets are more expensive than coil springs, but you can have them act across an air gap. Were not going to focus on these comparisons here. Emilio P.G. How did that work? V}(}X e7l#zb`If!s5@1 firearms are generally relatively simple devices why would you want to complicate it? (Comment Policy). They act as a vibration isolation device across a range of mass and frequencies, which can be tuned for a specific application. For our pogo stick where we want to spread the force over a long springy distance, the coil spring is better. (888) 582-0822, TRAMP METAL GROUP: By clicking Accept All, you consent to the use of ALL the cookies. %%EOF Here at European Springs we know how important springs are in everydays life.

You are touching on a concept about magnets called hardness. For a pogo stick, it's pretty clear that magnets are not a good choice. Consider the pogo stick pressed down with the spring fully compressed.

(Scientists like to apply the Ising model to describe this dynamic which is appropriate for the most part. We also use third-party cookies that help us analyze and understand how you use this website. To investigate this topic in more detail without a lot of expensive and dangerously powerful magnets, we created a small scale model, roughly 1/8 the size.

If high (such as in neodymium), a much stronger field is required to do the same thing.

These Smart-Mag units hover at an equilibrium distance in space. Like a captured spring, why not captured magnets with or without an additional spring to prevent them from hitting each other and shattering. They printed out a 1/8th scale pogo stick, complete with a spring. Digital springs however are a thing.

Id like to point out the pogo stick was testing in a planet sized magnetic field. I think rsrocket1's objections are valid. Another unique attribute of spring Polymagnets is that they dampen vibrations from one magnet to the other. 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. As we add more and more magnets, the thickness of the magnets limits the overall travel of the stick. Email: imi@magnetics.com, AUTOMATION GROUP: The takeaway from this experiment is extremely obvious in retrospect, but probably too subtle for a lot of people. Such magnets are known as soft magnets and that was all we had for some time. Do you want that inside your gun? But that needs power and probably much power. Can Magnets Replace The Spring In A Pogo Stick? Hmm, yes, cost would be more for sure. :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? What magnets should be used to replace a given spring? vBulletin v3.8.11, Copyright 2000-2022, vBulletin Solutions Inc. Why aren't there magnetic recoil "springs? There could be interactions?

The two gaps in the middle look smaller than the outer gaps. Interesting idea, but has anyone thought about the. K&J Magnetics, Inc. will process your credit card order quickly, easily and securely. Is it the start of a good pogo stick replacement? Add more magnets.

We get a bit less force at the fully compressed position, but it increases the force along more of the pogo sticks travel. Hohner Morgane D/G, pre-Erica Hohner in C/F and G/C. Don't try to cheat it unless you like the idea of the vixen I just mentioned biting you. x 1/4" I.D.

Uh okay. 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. 108 0 obj <>/Filter/FlateDecode/ID[]/Index[93 22]/Info 92 0 R/Length 87/Prev 1157343/Root 94 0 R/Size 115/Type/XRef/W[1 3 1]>>stream We want there to be some force right at the beginning of the travel. Then they took out the spring and put a few magnets where the spring should go. To get a quick idea of what magnets could do, we built something we could stand on. They are made by two pieces: a stator and a slider. Making a steel spring is incredibly cheap compared to the expenses in making a neodymium magnet strong enough to do the same job. 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. Scientists arent fond of common sense. Numerical methods and computers need to be used to add up total effects between, say two 1 cm cube magnets with parallel magnetic axis. ), 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. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. My boxes tend to get a hard life, playing in fairly loud ceilidh bands and outdoors for morris.

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We wanted to explore the differences in the behavior of springs vs. magnets. How much of a magnetic field a permanent magnet can tolerate is dependent on the material its made out of. 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.

G/C of uncertain parentage; lovely little Hlavacek 1-row Heligonka; B/E Koch. Its the case with articles asking if Millennials are responsible for all of the worlds ills, or if some technology is the future. Compress the spring 1/2, and the force should be 4 lb. As to whether the domains in that context self heal or even grow there, maybe someone at K&J Magnetics knows the answer. Should you use repelling magnets instead of a coil spring in your next device? Industrial Magnetics and Making Things Better are Registered Trademarks of Industrial Magnetics, Inc. These cookies do not store any personal information. We don't know. Ficara has added a new project titled 125KHz tag reader and contactless lock. 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. The energy in this compressed pogo stick is equal to the area under the spring curve. During this testing, we noticed that the spacing between the magnets wasnt even. Spring polymagnets work in pairs to simulate the functionality of a spring with compression and tension forces. ????

Not so. Theres also a video, you can check that out below. A key measure of pogo stick performance is how much it shoots up into the air. vI Hv7P}@aIPFt3|gPAD%N|]=lV/X1Hwuc|~v[LCBm^;*>\x)lnF_mMn7n ~ ^s?[5f=MqU[O For a pogo stick, we dont want the spring to start with zero force.

High School Shop class told us, Is it possible?

We compressed a bunch of magnets in a stack, varying the number of magnets.

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) 582-0823, MAG-MATE GROUP:

:-). Its still not the same as the old spring, but the force is similar.

Is it possible to fit an exponential function to fit a linear function? 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. Spring Polymagnets are produced in matched pairs and rest at an equilibrium distance apart. 114 0 obj <>stream We found that repelling magnets are very different compared to springs. I've no idea how old that box is - I'm still playing it after owning it for over 25 years and never had another spring breakage. 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.

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) . We got our hands on an old coil-spring pogo stick and measured the strength of its spring. Magnets do impose fields upon each other so I suppose if the imposed fields are stronger than the hardness of the magnets, it could weaken them. With those youll move through such a small portion of the field it will appear linear. 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. Magnetic springs provide high-speed motion using minimal energy, so they could be the perfect substitute for motors. We've seen the crazy repulsion some strong magnets can provide, why not use that? We'd obviously use non magnetic material for the lever etc, but I have just a slight niggle about all these N/S poles in close proximity. The only spring I've ever broken in about 35 years of playing was a bass spring on a 2nd-hand Hohner 4-stop 1-row. 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. x 1/4" thick RC44 ring magnets. True, but todays electric vehicles also seemed impossible a decade ago. Copyright 2007-2022 - Industrial Magnetics, Inc. - All Rights Reserved. This causes some partial demagnetization of the stator, reducing the maximum torque the motor can produce.

Electrolytes, Theyre What Dehydrated Hackaday Writers Crave! http://www.theshootersbox.com/DPM-Systems_c_859.html, metal shavings from anywhere getting stuck all over outside buffer tube. 0

As with so many magnet answers, it depends. Any one out there experience this? The forces involved in a real pogo stick are quite powerful, pushing with many hundreds of pounds of force. 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. This category only includes cookies that ensures basic functionalities and security features of the website. How can we do this? 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. 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. Distance, where the energy in the spring is shown by the area under the line. probably increases your hit chance about as much as the gravitation between you and the bullet, magazine feed using magnets instead of springs. Mounting three magnets onto a pogo stick gave the same exponential force, but still not enough. The combined fields created by the domains within the magnet were actually able reinforce each other and keep each other stable making them harder. That drives home the problem we face -- the repelling magnet setup doesn't have nearly as much travel as the coil spring. All my other boxes still have their full complements of original springs. We receive quite a few questions about replacing compression springs with repelling magnets. I wonder what it is that makes spring breakage a problem for some and not for others? This is really another way of asking how much energy is stored in the spring. The magnetic springs, on the other hand, simply use the energy stored in the magnetic fields so they can achieve incredibly speeds consuming very little energy when compared to a conventional motor. You are so right. Betteridges law of headlines states that any headline that ends in a question mark can be answered by the word no. After bouncing around the office a bit, we got a good sense of how much force it provides.

When it finally does, it increases very quickly! Its very weak, and doesnt start increasing until close to the end. 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. How far will he shoot up when the spring is released? If you would like to send drawings with your enquiry, please email us directly with your enquiry and drawings attached to. Magnets may show some use in target rifle trigger. To evaluate the strength of this two-magnet system, we simulated and experimentally measured the forces. Higher speed implies a bigger motor, which in turn will consume more energy and cost much more. We really only feel the repulsion force when the magnets get close together.

The magnets rest at a defined distance apart from each other and repel when pushed. Well, technically, entropy will cause the ordered magnetic domains to eventually fall into chaos, but thats on a hell of a time scale. 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. At least springs don't have to "move", just compress.

The solution is to preload the spring. (or just plain amusement :-) ), . Magnets, on the other hand, obey the inverse square law. But a lack of understanding of the basic forces of nature never stopped anyone, so the folks at K & J Magnetics made a really neat test.

They do not have a bias to align, so they must be mechanically constrained to perform properly. 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.

Please be kind and respectful to help make the comments section excellent. KC^qJ6(BN]FK$! Polymagnet is a trademark of Correlated Magnetics Research. Fax: (231) 582-0622 If you squish this spring by 1, you expect the force to be 8 lb.

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. This design note goes into detail about spring Polymagnets, which rest at a defined distance apart from each other, repel when pushed together and attract when pulled apart. Even before we jump on the pogo stick, the start position has that spring compressed by about 0.538. This pattern turned up in a number of different scenarios we tried, beyond the one shown here. If the magnets are stored alone, they should be fine indefinitely.

If you go to 2, you expect 16 lb.

In practicenot necessarily. However, if theyre stored in the presence of other magnetic fields, they can be degraded, depending on how strong those fields are. Besides, I dont think exponential means what you think it means.

X$EF"`dlLuyOq*}7 Maybe he's never heard "If it ain't broke, don't fix it". (888) 582-0821, WALKER MAGNETICS: Festeezio liked DIY Beam-on-Target Fusion Particle Accelerator.

Heat can kill neodymium magnets, that may be the reason. We took a 2.938 long spring and squished it into an opening that was only 2.4. 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. Sr8xJ Ficara has added details to 125KHz tag reader and contactless lock. The way they feel and perform are not the same. The bigger the area, the more energy, the higher we bounce. ( I have however never done this conciously in order to prolong spring life!

hRJ1y[7[ If your spring application needs a tight range where the force is delivered, magnets might be great. 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. Check out our spring catalogue and if you have a visionary project in mind contact us so we help you design your perfect spring. Can we remove the spring and replace it with some powerful repelling magnets? Some observers have described the behavior of the spring Polymagnet as a contactless attachment, which is a unique property in the world of mechanical engineering. 6~v`LM1NX8#I\Xk"6Y+GkH=PJ^)LJ }L@0#qd~S8|_8O0iCdi ` # I think the main difficulty will be having them repelling enough to keep the pallets from opening under normal bellows pressures (I have this problem with some spring-equipped boxes with a light touch). Heat and Vibration are enemies of magnets. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Now were getting even more force, but the overall travel is less than the old coil spring.

I think there are 2 main variables - the strength (size) of magnets used in the first place, and their distance from each other. Magnetic keepers (you see them mostly on old horseshoe magnets) wouldnt be necessary otherwise. I thought about that too Lester. :-) 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. 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. Festeezio liked DIY Watch with WiFi and Audio. It worked like any pogo stick would. Playing with it, something is obvious right away. I was playing with some hellishly strong neodium magnets (salvaged from some hard drives) and I was thinking why aren't magnets used instead of recoils springs? I personally think i, taking into account the added weight & probably cost - all those magnets produced in relatively small quantities would not come as cheap as 'standard' size magnets produced by the million. ". (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.

Bergflodt D/G 4 voice, Saltarelle Bouebe D/G, Super Preciosa D/Em, Hohner Impiliput B/C+C#. %PDF-1.7 % Design, Develop, And Produce Innovative Magnetic Products. As we add more magnets to the stack, the maximum pull force alternates up and down.

So we come to this fascinating case of native content(amusing, veiled advertising) from a store that sells really, really powerful magnets. Magnets, on the other hand, obey the inverse square law.

Not only doesnt it feel right, it doesnt perform well either. Please check our Privacy Policy to see what we'll do with your information. Four, five, and six magnets were added to the model pogo stick, and while six magnets gave this model pogo enough force to be bouncy, there simply wasnt enough space for the pogo stick to compress. 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. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. (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. (Unfortunately very few know that.) We added a third magnet, alternating which way the polarity faces with each magnet. Imagine a 15 lb miniature person standing on it. 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. A place for general potato gun questions and discussions. Its weaker in the first 3/4 of travel, then gets stronger at the end. With a coiled spring the force is constant over the distance of compression. https://en.wikipedia.org/wiki/Magnet_keeper. hbbd```b``3@$-tL@d`*m"YH60$j@l)H h[X@m  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. Robert Kardos liked IS31FL3741 Breakout Board (PMOD). If the magnet isnt magnetically hard enough the damage could be substantial. This site uses Akismet to reduce spam. You will be emailed a one-time, temporary password. 0 Members and 1 Guest are viewing this topic. The benefits would be more craziness due to variable and adjustable characteristics. This raises up the force even more, but its still dramatically weaker than the spring over most of the range of travel. The spring constant (k) of our spring is about 8 lb/in. A simple mechanical spring from the hardware store seemed a good place to start. Thermal agitation and such would eat away at the magnetic domains and randomize them until they were gone. Preloaded Coil Spring, Force vs.

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. Why is this so? Get HUUGE Planet sized magnets. Enter the email address associated with your Amazing Magnets account. *) For example, wrap a wire around it connected to a load. They will rest at a defined distance apart from each other, repel when pushed together and attract when pulled apart. This still isnt anywhere near the strength of the coil spring, but its improving in the right direction. I just learned along the way that magnetic field follow inverse cubed relationship rather than inverse squared. I think that Sandy's point is a good one. Do they give you the performance you want where you need it? Thats not fair to the spring, though, since the next half-inch of travel doubles the energy it stores.

Thats a lot weaker! 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. Also theres probably a lot of energy to recover from renegerative braking, so the net waste would be not that high. DG Dino Baffetti Carnival II (plus accordions). Our adult weight compressed it by about 2". Newly acquired G/C Hohner Viktoria. What happens? There are many of pros and cons using springy magnets in such situations. We are now required to collect sales tax in several states.

It worked well. endstream endobj startxref

Learn more. Your shop teacher was right. 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 Then there's the matter of bulk material with the vast number of inter-mono-pole interactions. ry Cofz@a7N\|QHyy9b)we'!XEob/" I&"{3#e'cb"? Industrial Magnetics, Inc. - Making Things Better, Home / Mag-Mate / Smart-Mags / Spring Magnets. 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.

Im sure K&J Magnetics has a wizard there who knows a thing or two about that. We probably should have chosen a more pro-magnet application!

View Full Version : Why aren't there magnetic recoil "springs?". :-) ). Theres a difference between a linear relationship and and exponential relationship. Have you ever played with magnets as a kid and run one through the sand and watch it pick up "fuzzy stuff"?

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on't see any benefit for recoil