I swear I've watched this video a dozen times over the years just to refresh my memory how these magical devices work. Best one on the internet, for sure. Cheers!
I wasn't really up for making a plywood version but this I will definitely do. You really do have a talent for coming up with ideas and making them work
@@AndrewKleinWW Can you please make a video of a magnet not sticking to a magnet I just want the opposite a way around So the magnet doesn't attract It rejects Because I want to make the floating ball But the problem with that is the Others size of the magnet Is gonna keep sticking to things please
Hi Andrew, Do you realise that you could have saved 50% of magnets, without losing any strength? Now each layers has six magnets in a start orientation. Instead, you could have used three magnets per layer, going around in a loop, 1-2, 3-4 and 5-6. That would also saved you the central steel pin, which could be a simple screw. Inspired by your video, I bought the steel and magnets, and confirmed this finding. Of course a new challenge is how to get the magnets in there. My trick is to have a pause in the gcode, put the magnets in, and then continue the print. Thanks again for the inspiration! Oskar
@@AndrewKleinWW Hi Andrew, here are already some photos of the result (www.shapeways.com/product/DRAXY3BJG/magnet-unlock), with reference to your work. The video may take a while, but enjoy the photos! Oskar
@@AndrewKleinWW Thanks! Yes, I am designing and making all puzzles on my RU-vid channel myself, including the colorful Magnet Unlock puzzle. I have been using my own 3D-printer for the last year. Where is your extra factor 9 coming from? The order of the three disks is immaterial to the solution, and so is the placement of the first disk. Once the first disk is in place, then there are 12 options for the second disk (6 rotations + 6 upside-down), and 12 for the third disk. So 12x12=144.
Sorry, should have said I got 1728 configurations. That was with ordering included, since there are 6 ordering setups you divide 1728 by 6 to get 288 if ordering doesn’t matter (do you really eliminate all external field with the solution in any of the 6 orders?). So I’m still getting 288, not 144, because I was counting the flip of the first disk as well as flips and 60 degree rotations of the second two.
I really enjoy how you transposed physical mecanisms and concepts rigth into a very useful everyday tool. And magnets have this very feature that it always seems remote and magical … really amazing work, and that’s very nice you even took time to explain the magnetic field involved.
Thanks Andrew, for the nice design for a mag switch and the clear explanation of the working principle. I am planning to make my first mag switch with plywood. I feel, there are advantages if you use cube magnets and steel rods with square cross section. - A 10x10x10mm cube magnet has 127% of the volume of a 10mm dia x 10mm high cylindrical magnet. - 8 cube magnets can be used instead of 12 cylindrical ones and the rotation angle will be 90 degrees. - Since there are no curved surfaces anywhere, the cube magnets will have a larger area in perfect contact with the square rod at the center as well as the peripheral rods, resulting in a stronger mag switch even though the number of magnets is reduced from 12 to 8. - Cube magnets and square rods are easily available. - If the device is going to be 3D printed, it's only a design change. However, if plywood is to be used, making a square hole may not be that easy. Looking forward to your comments. Thanks.
After posting, I created the model in Sketchup and realized that the central rod has to be necessarily circular in order to rotate the top portion by 90 degrees. However, this issue can be resolved by making the central rod circular. This will of course introduce curved surfaces and may make the switch less powerful. Building the models and testing them will provide definitive answers.
Andy, the whiteboard explanation was very helpful! Love this little invention. Originally I thought the top section had magnetized metal rods and rotating the tool aligned the lower (normal) metal rods with the upper magnets. Now I see you have a much more interesting and stronger design! Davis
Thank you so much! This is the perfect follow-up video! I'm not great with woodworking, but I do have access to a 3D printer, and I was very curious how the magnets worked.
Enjoy your adventures and enthusiasm in your work. Hope things continue working out for you. Don't know if you like teaching but you are a good teacher.
Thanks for sharing. Well worth $5 This allowed me to connect a bunch of dots from smarter every day’s polymagnet video that your design could lead to a number of other mechanics - something I think you could get ahead of and also sell
Well, this is official.... You are doing good! As a former high school teacher, I see students start with the design in sketchup, understand the principals you explain here, understand the importants of tolerances in their design and then, 3D print this. Thank you for this!
Great. Just purchased. Upgraded my Anet A8 with an MKS Gen L and MKS TFT24 today and fully calibrated it. I was looking for an stl file worth printing and I have been looking for a printable mag switch for ages - stl file found. Cheers!
Really cool! Always been impressed by the commercially available magnetic fences and feather boards, but turned off by the price. I'll definitely make a few of these when I finally get a 3D printer. Curious to see how big and how small you could make these...
Just bought these plans, and will be ordering the magnets soon. Just have to decide how many of each size I'm going to make. But I don't know how much steel rod I need to order -- cut lengths for the 1/2", 3/4", and 1" steel rod would be FANTASTIC! Right now I'm going to have to print the parts so I can measure them before I can order my steel rods.
I find your complaint valid, plans should come with directions. You can however open the file in your preferred viewer software and get your measurements from there.
@@AndrewKleinWW Will do! Planning to cut the metal on the weekend using my bandsaw. Also ordered the magnets, so just waiting for those to arrive. In the meantime, here is a photo of the finished print. It turned out very good. photos.google.com/photo/AF1QipOzy93X6-DuEPnqldTak-VSFJYCODTwiODPSZGO
Bravo Andrew! A good accelerator for CA is simple baking soda. As well the only UPside I see to the plywood versus this is the wood not scoring or being less likely to scratch your surfaces- but then again- Meh- put it on a washcloth! Have you tested the lift/hold/pull of this model? Love it- Thank you!
Andrew, can you please post a link to the magnets that have the right dimension to fit into the 3D print as well as letting us know the gage rod you used?
Excellent vid! I washed the wood one first and though the same. I did download the files and they look great but I was interested in Fusion 360 files or STEP SAT. Just to use stock on hand or adjust for 3D printer tolerance?
awesome follow up and lesson on how it actually works. now I have to get someone to print it for me. it's interesting that the smaller switchable magnet bases machinists use for attaching dial gages etc use one magnet and a few strips of aluminum in a steel case also works, but with only one magnet. I guess the aluminum blocks the flux when aligned with the pole (since the pole is like the "opening" to the flux). are you considering an updated design based on what OskarPuzzle said? I would buy that plan too! thanks!
I can understand why some get a 3d-printer, but I much prefer a piece of a dead tree and some kind of tool to make it smaller. Even if I rarely end up with the same level of perfection as some of the youtube woodworkers - I still enjoy the time spent very much.
@@NomenNescio99 there is no replacement for working with dead trees ;-). However as an addition to the woodworking shop I would love to have a 3D printer. There simple are some things that you should print and not build.
@@CornerfieldShop That's why you need to have a friend who has a good 3d-printer..... I regularly need to help out my 3d printing friend with some woodworking stuff and tools as well. And luckily, the both of us already found a third friend who can weld metals - otherwise we wouldn't have any good BBQ-equipment, and that would be a real tragedy.
Look into halbach arrays, you can basically contain all the field lines on one side of the magnet using those, that way your pulling force is basically doubled for the same number of magnets :)
I am working on an idea for a quick release device activated by your mag switch to allow continued motion of the device. Do you design custom parts since I do not have a 3d printer and do not do cad.
Great video! Is it possible to pick up & drop a magnet of similar strength instead of metal? Also, can this mechanism be reversed to repel another magnet instead of attract? Thanks!
Now this is the video i've been waiting from this guy (even thought i still didn't get that) and 5 bucks for that design?! that's worth every penny of it!!
Andrew I purchased the 3D files, but wanted to know what settings you used. Layer height, % of infill, Material PLA or ABS and does this need support option. Also would you be able to provide the 3d model from your previous bowl gouge holder video for purchase on your sight.
I love magnets lol what exactly do you use them for? I saw the picture on instagram that said "I wish I'd put my thinking cap on sooner". Can we go through what a few of those are?
Fantastic device. I've been interested in creating a magnetic switch to use in the shop for several months. I'd like to buy the plans but I'd like to modify the frame with mounting points for attaching items such as jigs or fences, etc. Are you willing to sell the design source files ( Fusion, SketchUp, SCAD, or other) so I can do that? I can import an stl into Fusion, but the 3D source would work better.
I'm looking for a switchable magnet of mini-size (few more than 1 inch in dia) with a smaller "switch angle" than the 60 degrees of your example. Did you experienced any drawback in decreasing the angle between the magnets and increasing their number? (Obviously by properlyreducing the size of magnets and iron parts too).
Leaving out the cost of the plans that is perfectly reasonable considering you can make as many as you want for that 1 time purchase, i was wondering if the single set comes with the templates for the plywood version as well as the stl files, or is it just one or the other? I was also wondering how much the magnets, and metal cost? And what kind of lifting power the finished product has?. Trying to get a idea of how it compares to commercially available models both in lifting capacity and overall cost. Its a given that it cant be used for something like welding, far to much heat for either version to survive without starting a fire. but would it hold up on a cut off saw. or something similar do you think? Or is this strictly for cold working applications only?
Nice work, both for Andrew and the following comments. 👍🏻😁 Even though one part is named as the base the assembled unit indeed seems to have a double sided or obverse functionality. Could you indeed save another step by making the top and bottom pieces identical so that the 2 holding screws in the exterior rotation enabler/limiter be inverse to each other. One up and one down. I’m guessing that it still should rotate and reset just as easily? 🤔
When drawing the magnetic lines it's better to use arrows to indicate the flow of them From N to S Sometimes you draw them from S to N confusing me so I had to Google to make sure Other than that great video! 👍👍
Thx for producing the plans for these, oh and I love the Bench you made for Adam its amazing! Could you or someone tell me the screw sizes /type for the 3d printed versions please as I am printing them off and would prefer not to crack them bye oversizing. Thx.
Hi, Andrew, I built one of your switches, works great thank you. Now I would like to build a small mag table, say 7 by 4" or there abouts , like the ones usedon surfacegrinders. I am having trouble drawing it out and getting the right size of magnets etc. Have you done anything like it or how about a youtube video on it? Many thanks again
You just explained your design away for free... thanks with sincerity. But what if one one half that Twists you add an extra set of magnets so it Never sticks (Hand control side) and metal sticking side as normal... would that enhance the pull of the metal sticking half? Or even work?
Does the center rod contribute to the strength? I will have at all times the same amount of south oriented magnets as well as north oriented ones pointed to it. They should cancel out, so I think there is no need to use steel for the center.
@@AndrewKleinWW Sir/Madam, This was greatly appreciated and inspired a brief episode of mild gladness in an otherwise delightfully formal day. Solemnly, Master G M
Maybe an obvious question, but I'll ask anyway. I'm in awe of how well it is designed and works. Idk what applications it has. Can you clarify... How will it be used?
Very cool. It would be interesting to see what the lifting capacity of it would be. Is it the sum of all the individual magnets or is there some "loss"?
...and also, keep your "switched magnets' in the OFF (no attraction) mode or ON with two steel plates on them when not in use. Magnets like to have their magnetic fluxes set to their maximum and leaving these switches to their ON position without any steel on them will have their fields in less than optimal condition.
