Magnets thread

Discussion in 'Puzzle Building, Modding, & Designing' started by Rcuber123, Nov 12, 2016.

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  1. DMCubing

    DMCubing Member

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    Two separate sellers, back in February, thinking my odds of being ripped off would be less by purchasing from two different sellers. Since then, I only buy from domestic US magnetic companies (Gaussboys, Apex, and Thackery) and an occasional purchase from China, magnets365.
     
  2. applezfall

    applezfall Member

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    overseas shipping is pretty expensive
    also from what seller did you buy your 3x2s?
     
  3. DMCubing

    DMCubing Member

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    I just dug through all my PayPal and online purchases and can't find the sellers. Good case scenario would be that they never charged my card, which is what it's beginning to look like, but if I get a chance this week, I'll try to track the transactions down through my email, as there should be a record of it somewhere.
    You didn't mention where you're from. If you're not in the US, I've had great service from magnets365. They're in China and have free shipping.
     
  4. applezfall

    applezfall Member

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    I am from Moldova (you can check my wca profile for that info )
    I will look into magnets365
     
  5. DMCubing

    DMCubing Member

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    I actually did check your profile here before replying. It said you were from home or something like that.
     
  6. applezfall

    applezfall Member

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    Lol a lot a people put a stupid location but I meant my WCA profile: https://www.worldcubeassociation.org/persons/2016NAGR01
    Also I looked into magnets365 and they have the magnets that I need expect magnets for a 2x2
     
    Last edited: Nov 12, 2017
  7. One Wheel

    One Wheel Member

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    chron0s likes this.
  8. DavidWoner

    DavidWoner The Punchmaster

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    Is there a consensus for magnets to use in 60mm 4x4s (Mini AoSu, Yuxin Blue)? I've found people saying N52 3x1.5 inner with N38 4x2 outer, as well as people saying to use the WuQue's N48 4x1.5 inner with 5x1 outer. I'm a little concerned with the larger magnets fitting in the slightly smaller pieces.

    I'd prefer a lighter magnetic feel overall, my mini AoSu's outer layers are quite good already I'm just looking to increase stability a bit.
     
    chron0s likes this.
  9. xyzzy

    xyzzy Member

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    Is it possible to meaningfully magnetise the Shengshou kilominx (without drilling holes like in the Cubicle Galaxy M)?

    The edge pieces aren't symmetrical (!), with differently shaped holes on either side at different radii. You could put small magnets in there along with magnets in the corners, but consider these. (i) There's only one layer of plastic between the magnets (so ~1 mm) rather than two. (ii) For the hole further away from the core, the magnets in the edge have to be really tiny, like 2×1 tiny. (iii) For the hole nearer to the core, there's a bit more space, and maybe a 3×2 or 4×2 might fit. (iv) If you magnetise only one of the two holes, there may be polarity-related issues. (v) Regardless, the faces won't have a consistent magnetic pull, although the inconsistency might or might not be noticeable.

    You could also place the magnet "on the side", so (e.g.) the north pole faces outwards (as in outside of the puzzle) and the south pole faces inwards (as in towards the core), which would eliminate polarity concerns and allow for larger magnets, but side-to-side magnetic attraction is much weaker than face-to-face attraction.

    The corner pieces have a "unified" design (not split pieces, not exterior caps), although on each corner, one of the interior faces is a removable cap, so you can still place magnets on the inside. It could be possible to magnetise just the corners and forget about the edges entirely (like a 2×2×2), but there is an inherently large distance between the two corners due to puzzle geometry (~7 mm at minimum), and the magnetic strength calculator is telling me there's essentially zero force between the magnets if we constrain the magnets to be small enough to fit within the pieces. (Increasing magnet diameter also forces them to be further apart; with 5 mm diameter magnets, the distance has to be at least ~11 mm, I think.)
     
  10. One Wheel

    One Wheel Member

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    I don't think there's any consensus on magnets at all. I just saw somebody on reddit yesterday saying that magnets aren't any good except to stabilize a very unstable cube. I used 4x2 n38 and 4x1.5 n38 in a yuxin blue and I like it, but if you're looking for a subtle magnetic feel that won't work. I personally prefer having the cube in hand to measure the size of the spaces, but if the magnet will fit without making the cube too difficult to turn the bigger (diameter) the better, generally.
     
  11. newtonbase

    newtonbase Premium Member

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    I've just used N35 4x2mm outer and N35 4x1.5mm inner on a Wuque and the inners are far too strong. I meant to use 4x1mm but picked up the wrong stack.
     
  12. One Wheel

    One Wheel Member

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    Is the inner layer too strong relative to the outer layer, or is it too strong all around?
     
  13. newtonbase

    newtonbase Premium Member

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    The outer layers are really nice but the inners are difficult to turn. I'm being sent a few spare edge pieces and some 4x.5mm magnets so I can avoid ripping out all the magnets.
     
  14. I used 3x1.5mm N50 for the inner layer. It is great!
     
  15. Also I know this has been talked about before but what magnets are good for a Wushuang 5x5? If someone knows the pages that this was discussed that would be helpful. I don't have time to look though them all. Thanks.
     
  16. One Wheel

    One Wheel Member

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    4x2 n35 outside, 4x2 n38 inside fit and work fairly well, but they aren't exactly what could be described as subtle, if that's what you're looking for.
     
    CornerCutter likes this.
  17. a3533

    a3533 Member

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    Mar 20, 2017
    Did anyone tried magnetising 3x3 but instead of putting them between edge and corner, put between center and edge?
     
  18. newtonbase

    newtonbase Premium Member

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    Yes. I've done the MF3RS. A lot of cubes are not suited as there are contours in the sides if the pieces but the MF3RS is nice and straight. I used N35 5x1mm magnets. The cube is really nice.
     
  19. a3533

    a3533 Member

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    Mar 20, 2017
    Wow, seems interesting! I'm going to try this because mine is also MF3RS! Thanks for the info anyway! But can you help me with the polarity of magnets or have any guide on youtube?
     
  20. newtonbase

    newtonbase Premium Member

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    Polarity is easy. Edges have one and centres have the other. In practice it's a bit fiddly as there's no space to just drop the magnet in and let it turn itself the right way around so you need to keep track of them. I took the whole core apart to do it.
     

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