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ITSA General Assembly: December 5th - 12th

Author Topic: 3D plastic printing  (Read 6540 times)

czyoyo

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Re: 3D plastic printing
« Reply #15 on: March 28, 2013, 03:34:38 AM »

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

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Re: 3D plastic printing
« Reply #16 on: March 28, 2013, 10:35:03 PM »

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
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czyoyo

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Re: 3D plastic printing
« Reply #17 on: March 29, 2013, 03:47:48 AM »

Yeah. I didn't think of that. Oxygen does it all the time.
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ta0

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Re: 3D plastic printing
« Reply #18 on: March 29, 2013, 09:40:57 AM »

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? 
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jim in paris

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Re: 3D plastic printing
« Reply #19 on: March 29, 2013, 01:49:11 PM »

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 ... ;D

jim
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kyo

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Re: 3D plastic printing
« Reply #20 on: March 29, 2013, 08:17:49 PM »

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
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johnm

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Re: 3D plastic printing
« Reply #21 on: March 29, 2013, 08:42:14 PM »

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.
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kyo

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Re: 3D plastic printing
« Reply #22 on: March 30, 2013, 03:58:17 AM »

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
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