# Yoyo CAD & Prototyping Adventures **URL:** \ **Category:** Yo-Yo Mods and Maintenance\ **Created:** [August 7, 2018, 3:40pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547 "2018-08-07T15:40:59Z")\ **Posts on this page:** 20\ **Page:** 82
**Author:** ![Prion\_yoyos](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/prion_yoyos/32/190184_2.png) [@Prion\_yoyos](https://forums.yoyoexpert.com/u/Prion_yoyos)\ **Post date:** [July 8, 2024, 10:44pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1656 "2024-07-08T22:44:15Z")
moreover, those grooves would be difficult to machine ---
**Author:** ![FrankDeath](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/frankdeath/32/271970_2.png) [@FrankDeath](https://forums.yoyoexpert.com/u/FrankDeath)\ **Post date:** [July 8, 2024, 10:46pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1657 "2024-07-08T22:46:48Z")
It might be ok with Dynames-like grooves. ---
**Author:** ![AtomicChessGuy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/atomicchessguy/32/606394_2.png) [@AtomicChessGuy](https://forums.yoyoexpert.com/u/AtomicChessGuy)\ **Post date:** [July 8, 2024, 10:48pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1658 "2024-07-08T22:48:46Z")
What are Dynames-like grooves? I know the Dynames yoyo but it doesn’t have large grooves taken out of it does it? ---
**Author:** ![Lido](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/lido/32/173650_2.png) [@Lido](https://forums.yoyoexpert.com/u/Lido)\ **Post date:** [July 8, 2024, 10:56pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1659 "2024-07-08T22:56:15Z")
Looks like just one shallow V groove. No trenches. ---
**Author:** ![AtomicChessGuy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/atomicchessguy/32/606394_2.png) [@AtomicChessGuy](https://forums.yoyoexpert.com/u/AtomicChessGuy)\ **Post date:** [July 8, 2024, 10:56pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1660 "2024-07-08T22:56:51Z")
Ah, that part. I see. ---
**Author:** ![Captrogers](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/captrogers/32/647012_2.png) [@Captrogers](https://forums.yoyoexpert.com/u/Captrogers)\ **Post date:** [July 8, 2024, 11:09pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1661 "2024-07-08T23:09:18Z")
The weird knots that would form . I could dig it ---
**Author:** ![Lido](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/lido/32/173650_2.png) [@Lido](https://forums.yoyoexpert.com/u/Lido)\ **Post date:** [July 8, 2024, 11:17pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1662 "2024-07-08T23:17:12Z")
@MarkD @hobbygod I was talking to a couple of people who designed or worked with designers on two different yoyos and both said that their designs had vibe or wobble. I asked if it was the design or the machining and one of them said definitively “the design.” You throw it, it’s wobbling, you straighten it out, it’s smooth for a bit, then it starts wobbling again. ![](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/8/c/7/8c78e23b73c7445b7f95a083af4680acb93546e8.gif) ---
**Author:** ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)\ **Post date:** [July 8, 2024, 11:40pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1663 "2024-07-08T23:40:05Z")
There are particular sizes/distributions that seem to accumulate pulse vibe, but you can usually fix it by making the yoyo wider OR taller OR narrower OR smaller, just to get away from the danger area. I don’t actually know how to determine where the problem zones might be! I’ve had a couple of my own designs suffer from this; they died in the prototyping stage. ---
**Author:** ![Lido](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/lido/32/173650_2.png) [@Lido](https://forums.yoyoexpert.com/u/Lido)\ **Post date:** [July 8, 2024, 11:52pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1664 "2024-07-08T23:52:08Z")
Is there some physics or engineering principle that could predict this so it could be avoided in the design stage? Seems like Newton’s laws shouldn’t allow this. ---
**Author:** ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)\ **Post date:** [July 8, 2024, 11:58pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1665 "2024-07-08T23:58:24Z")
Even a well machined yoyo is neither perfectly concentric nor perfectly rigid, so there’s a lot more complexity to consider. I haven’t really dug into it too much, I’ve only seen the experimental results. ---
**Author:** ![AtomicChessGuy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/atomicchessguy/32/606394_2.png) [@AtomicChessGuy](https://forums.yoyoexpert.com/u/AtomicChessGuy)\ **Post date:** [July 9, 2024, 1:09am UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1666 "2024-07-09T01:09:11Z")
What experiments are there on this? ---
**Author:** ![FrankDeath](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/frankdeath/32/271970_2.png) [@FrankDeath](https://forums.yoyoexpert.com/u/FrankDeath)\ **Post date:** [July 9, 2024, 1:30am UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1667 "2024-07-09T01:30:51Z")
I assume @MarkD is referring to the prototypes that failed as experimental results. ---
**Author:** ![FrankDeath](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/frankdeath/32/271970_2.png) [@FrankDeath](https://forums.yoyoexpert.com/u/FrankDeath)\ **Post date:** [July 9, 2024, 1:33am UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1668 "2024-07-09T01:33:45Z")
Is there any modeling software that could be used to simulate the behavior of yoyo prototypes? I would expect that to be significantly cheaper than making prototypes IRL. ---
**Author:** ![kksimon](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/kksimon/32/46108_2.png) [@kksimon](https://forums.yoyoexpert.com/u/kksimon)\ **Post date:** [July 9, 2024, 1:37am UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1669 "2024-07-09T01:37:45Z")
I have access to solidworks and simulations through school for a couple months. I’ll give it a shot! I only have yoyo models made for 3d printing so well see what the results look like. ---
**Author:** ![AtomicChessGuy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/atomicchessguy/32/606394_2.png) [@AtomicChessGuy](https://forums.yoyoexpert.com/u/AtomicChessGuy)\ **Post date:** [July 9, 2024, 2:00am UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1670 "2024-07-09T02:00:39Z")
I know Onedrop has somebody do this for them but I don’t know how, as the person who does it has an PHD in physics and just gives the numbers to Onedrop. ---
**Author:** ![redativity](https://avatars.discourse-cdn.com/v4/letter/r/4af34b/32.png) [@redativity](https://forums.yoyoexpert.com/u/redativity)\ **Post date:** [July 9, 2024, 6:00am UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1671 "2024-07-09T06:00:22Z")
I know there’s the [intermediate axis theorem](https://en.m.wikipedia.org/wiki/Tennis_racket_theorem) that says rotation of an object around a particular axis can be unstable, although this shouldn’t apply to yoyos because there’s no “intermediate” moment of inertia - two of the three principle axes of rotation are equivalent. So just take this as a fun fact and nothing to do with yoyo design lol. If I have the time I’ll try to work out some math to see if I can figure out what’s happening. ---
**Author:** ![redzaku](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/redzaku/32/231660_2.png) [@redzaku](https://forums.yoyoexpert.com/u/redzaku)\ **Post date:** [July 9, 2024, 6:12am UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1672 "2024-07-09T06:12:45Z")
id probaby try onshape lateron, it does look like a good program to do renders fast ---
**Author:** ![AtomicChessGuy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/atomicchessguy/32/606394_2.png) [@AtomicChessGuy](https://forums.yoyoexpert.com/u/AtomicChessGuy)\ **Post date:** [July 9, 2024, 1:26pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1673 "2024-07-09T13:26:46Z")
The free version of Onshape does not include rendering which is why I use Fusion 360. ---
**Author:** ![redzaku](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/redzaku/32/231660_2.png) [@redzaku](https://forums.yoyoexpert.com/u/redzaku)\ **Post date:** [July 9, 2024, 1:44pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1674 "2024-07-09T13:44:34Z")
i see, then ill still stick to freecad then 🤣 ---
**Author:** ![AtomicChessGuy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/atomicchessguy/32/606394_2.png) [@AtomicChessGuy](https://forums.yoyoexpert.com/u/AtomicChessGuy)\ **Post date:** [July 9, 2024, 2:20pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/1675 "2024-07-09T14:20:03Z")
Well, I still use Onshape to design though. [Previous page](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547.md?page=81) [Next page](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547.md?page=83)