Gallery, Projects and General > Gallery

Modding yo-yos

<< < (2/9) > >>

Mark132:
Thanks everyone.

Yes there is a balance of several variables that make a good yo-yo. Modifying them is al about making weak playing yo-yos into strong playing yo-yos.

One of the goals is to make the yo-yo smooth and vibration free. It is important to ensure that everything is done to both sides perfectly the same. Unbalanced(rotationally) halves cause a wobbly yo-yo. Other factors also make a wobbly yo-yo, bent axle, uneven bearing seat, trashy bearings, un-evenly treated hubstack bearings etc...

We all know a little about physics here, Max rim weight=max inertia= long spintimes. This is why a plastic body with metal rings are a popular mod. More dense material on the outer rim will increase inertia. A whole company was founded on that principle (www.yoyojam.com. I believe the rings I used on this yo-yo are bi-metallic, aluminum with titanium inserts in the undercut area. Although there is a drawback to massively outer weight, that is that it causes kickback in the throw the wider string gap also causes kickback, meaning when thrown the yo-yo grabs the "weight" and the extra string layers and lurches backward behind the thrower instead of straight downward like you would expect from a yo-yo.

Also extreme outerweaight causes some fulcrum instability. (Imagine 2 big people on a long seesaw). The yo-yo will lose its plane fairly easily.

as you can see there are lots of variables to take into consideration when designing a yo-yo. Most high-end yo-yos are made fully out of aluminum because you can more easily control the weight distribution as they are machined on CNC lathes.

There is a "happy-medium" weight that players like to use that is around the 62-68 g range. That is why aluminum is used instead of brass or steel. Although brass and steel have been used in miniature yo-yos to maintain playable weight in a tiny yo-yo. The mod I posted is about 72 g. I may fix that later.
 

Companys sometimes use brass and titanium in slim, stable long sleeper yo-yos for world records(which is in the 22 minute range for transaxle yo-yos).
Yo-yo designers try to find the balance of variables that make a smooth, stable, long spinning, comfortable, good looking yo-yo(not necessarily in that order of importance).

outer-weight(width) = spin time
center-weight= stability
small diameter = fast
large diameter = slow

Rob.Wilson:
 :bugeye:  ,, nice going Mark  :bow: :bow: :bow:


If I tried that i would either end up with my hands tied together or knock myself out with it  :doh:


Rob

Bogstandard:
Mark,

A very interesting post indeed, something totally different to what we have all seen before, a real eye opener.

Things have progressed some since my childhood days (1950-60's) when we couldn't even afford to buy a yoyo, and so made them from large coat buttons stitched together. Not very efficient though, but at least we tried.

It is amazing how technology can change the basic design from something so simple to what you are now showing us.


Bogs

kwackers:
Very cool.

And another reason why  :mmr: it's great to see so much variety.

cidrontmg:
I didn't know half of this before. Very interesting.
Any "secrets", or desirable / not good qualities on the string, and how to fix it?
 :wave:

Navigation

[0] Message Index

[#] Next page

[*] Previous page