excuse me if this is a foolish question but what does it mean to constrain something? I’m new to the whole field.
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it means that you define certain properties e.g. length, angle, etc so that the line cannot be changed. its like if you define 2 sides of a triangle and an angle, that fully defines the triangle as you cant change any more of the lengths of angles
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how should I design bimetal rims? how should they attach to the body? I’m kinda going for the wrap-around version like the Marco.
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This video goes over how to do rings in one way:
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:
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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.
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you could not add the dimple to the design and just make the dimple integrated to the cap to make it lighter
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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 
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This looks great! Could we get a profile shot? What’s the MMOI?
thanks for the compliment @AtomicChessGuy
ASAP i will post the MMOI after finish my work😄
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resin 3d print is not that accurate because resin shrinks when cured, so make sure it’s accounted for
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yep i know its not that accurate ,i print it just a quick look for the design 
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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 looks pretty cool, where do you plan on producing it at?
ohh yeah i forgot to mention,its the MMOI of whole yoyo
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im planning at FPM Manufacture,for me its affordable price to produce a prototype
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That’s great!
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