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[czyoyo]

That looks nice kyle!
Do you think the "holes" in the outside will slow down the spin?

[kyo]

It has been done with yoyos for many years, never caused a problem. Airflow just isn't a big factor in these spinning toys of ours.

Kyle

[czyoyo]

Yeah. I didn't think of that. Oxygen does it all the time.

[ta0]

Yeah. I didn't think of that. Oxygen does it all the time.

My experience with tops is just the contrary, holes decrease the spin a lot.  The air inside the the tops gets spun and blown out due to centripetal force, taking energy away.
Are the holes on the yo-yos on the sides or on the rims? 

[jim in paris]

i would say the same : i have extensively drilled holes in a spintastics trompo-grande and the loss of spintime ,the decay time is proportional to the number or surface of the holes
the fun part is that you get some interesting hummings and even sometimes whistling ...

jim

[kyo]

Yeah. I didn't think of that. Oxygen does it all the time.

My experience with tops is just the contrary, holes decrease the spin a lot.  The air inside the the tops gets spun and blown out due to centripetal force, taking energy away.
Are the holes on the yo-yos on the sides or on the rims?

Well this spins just fine..

http://www.flickr.com/photos/kyotoys/5595388523/#

Perhaps tops are much different, we'll see..

Kyle

[johnm]

That is a good looking top.  Is there a weight ring embedded in the print?

Additional air resistance may make this top a good regeneration training tool.

[kyo]

That is a good looking top.  Is there a weight ring embedded in the print?

Additional air resistance may make this top a good regeneration training tool.

No weight ring, but a ton of extra plastic should accomplish basically the same thing.. it's quite thick in the area a weight ring would typically go.

Kyle

[the Earl of Whirl]

This thread goes about as far back with 3D printing and this forum as I can find.  Where I exercise (right next to Chipotle in Centerville) is the Washington Township Recreation Center.  They are converting one of their rooms to a maker space.  It should open here in a few days.  It is also connected with a local library.  More and more libraries around here are offering things like this.  It seems like I could get some of these places to make some simple tops.

[the Earl of Whirl]

Creativity Commons is open.  Actually, it is a soft opening so there are no long lines.  I asked if they could make me a small top and they came up with this.  It was only 50 cents and the picture shows the top with part of the support system for the printing.

[Kirk]

It's worth mentioning that Onshape CAD software is FREE for hobbyists (if you are willing to have you designs shared publicly)
https://www.onshape.com/en/products/free

[the Earl of Whirl]

Here are some of the latest attempts.  The one at the top is a mistake that I put a tip/peg in.  It is really off balance, as you might imagine.  The one at the bottom is a coaster that I was going to put a tip in but it makes a nice spinning area.  The handle broke on the one to the left so I put a little wood handle on it.  The two pieces to the right are platforms that have spinning possibilities.  My question to the 3D printing pros is this: are there lots of platforms that end up in the trash?  If so, I may ask the Creative Commons people for some of their trash!!!

[Kirk]

Yes. Many 3D prints are built on a "raft" or platform.  They are considered trash.  Most of them are not round.