But the basics are there should generally be two planes one where the ring will be press-fit onto the aluminum and the other plane to keep it from being pressed too far. That sounds really confusing when I read through it so I highly recommend watching the video. It looks like the Marco has rings like this however:
remember the whole centre-weight problem? what if I did something like the fingerspin shutter and had a cap so that there is still material to lead to a dimple, but without the excess aluminium?
This in theory could work but you would also have the added weight of the cap. You would have to calculate(have the software do it for you) how much weight it added. Fingerspin dimples are not the end of the world. If you know what you are doing you can add one without adding too much extra centre weight.
hi everyone, here i’m introducing my yoyo design named Novaturient
Specs
diameter : 56,00mm
width : 49,50mm
material : 6061
approx weight : 65,5 - 66,0 gr
for the next ,i will print it on resin 3d for check the 1:1 scale, to see how the yoyo looks like and how proper this design (because i have a desire to make a prototype of this yoyo)
and thanks for all people in this forum ,i learn a lot about how to design a yoyo
Hmmm this seems like the right place but the numbers seem off. Usually a half of a yoyo is in the 10,000 to 20,000 MMOI range. For a whole yoyo maybe 20,000 to 40,000. Someone who know fusion better may be able to chime in. @MarkD Is this the right place?
this is my 1st yoyo design also a prototype for cf yoyo i’ll call it 135P
the profile is just straight v because it’s the most simplistic and most string tilt angle while doing horizontal, it’s also perfect to show off the material more because how simple it is so it won’t take the spotlight from the material
also my first time using autocad so i don’t understand how to put the dimensions on the drawing so i’ll tell the spec below
Diameter: 55.45mm
Width: 48mm
Trapeze Width: 47.5mm
Gap Width: 4.7mm
Edge Radius: 0.25mm
Compatible Caps: 44.8mm and 38mm found in duncan freehand 2 and yyf onestar/one
Weight: 53gr
Rim Weight: 20gr / half
Body material: Compression moulded Carbon Fiber a.k.a Forged Carbon fiber
Rim material: Brass
Bearing: Size C dual straight
Pad: 19mm
Axle: M4 16mm
it uses 4mm brass insert for the thread, Japan Technology Brown Spacer for the bearing seat, and 3d printed axle sleeve for the bearing post, this is done for reliability reason, i’ll ding my yoyo eventually and i don’t want to change the whole thing because of a broken bearing post, although it’s unlikely… side effect would be nice but it’s too heavy
You should definitely figure out how to dimension it.
Also increase the edge radius. 0.25mm is very sharp. I would go with at least 1.3mm.
53gms is light but if that’s what you want that’s fine.
You’ll want to figure out the MMOI in your CAD software.
I don’t know too much about designing in carbon fiber.
I’m not sure what you mean by using a brass insert and spacers and an axle sleeve. It sound interesting but I can’t quite picture it.
A straight V shape is certainly interesting. It’s not done these days but it was back in the day I believe.
All around this an interesting design. If you can get it made it would be very cool I think. Let me know if you have any more questions. I’ll try to help.
autocad doesn’t support material assignment unfortunately, so i find the volume using massprop and calculate it manually with the density of brass and carbon fiber to get the weight, so finding the mmoi would be really hard, most i could do to describe how powerful it is is the rim dimension and weight, OD 54mm and 20grams, as for the dimension parameter it’s already done, at least for the ring that’s all i need to give to the machinist
i have an idea to roughly estimate the mmoi, you’ve made so many yoyo designs would you mind changing the material density on some of them? carbon fiber have the density of 1.4gr/cm3 just change the aluminium body, my yoyo would weight at around 65grams if it was an aluminium bodied yoyo, you’ll get a rough estimates for the mmoi i think (ignoring the weight distribution ofc)