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 Horizontal Spinner speed?

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That Guy
samurai jesus
samurai jesus


People Skills: 2607
Registration date: 2009-03-16
Age: 22
Location: Pinecrest, Florida

PostSubject: Horizontal Spinner speed?   Wed May 06, 2009 1:45 pm

Hey Everybody,

I'm trying to design a 15lb horizontal spinner (an under cutter, a little like Rugburn, if anybody remembers that robot) and I was wondering; does anybody know a way of figuring out an estimate of the optimum speed for a disk like object with a diameter of about 18 inches?

thanks
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Dan Curhan
Admin


People Skills: 2948
Registration date: 2009-03-14
Age: 23
Location: Sarasota, FL

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 2:34 pm

http://www.riobotz.com.br/riobotz_combot_tutorial.pdf

this tutorial is awesome. It covers EVERYTHING. start at like page 156 (spinning disk design). It'll talk about that, then tooth design, which helps you figure out how far to make the teeth stick out for a given speed, so if you have your tooth depth set, you can calculate the optimal speed...
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http://666bots.blogspot.com/
That Guy
samurai jesus
samurai jesus


People Skills: 2607
Registration date: 2009-03-16
Age: 22
Location: Pinecrest, Florida

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 2:45 pm

Awesome. Thank You Dan!
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Cody
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PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 4:29 pm

18 in is huge
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That Guy
samurai jesus
samurai jesus


People Skills: 2607
Registration date: 2009-03-16
Age: 22
Location: Pinecrest, Florida

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 4:41 pm

only if it's a solid disk
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That Guy
samurai jesus
samurai jesus


People Skills: 2607
Registration date: 2009-03-16
Age: 22
Location: Pinecrest, Florida

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 4:43 pm

it's not that large if it's a bar mounted onto a disk either.
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Jeff L
Minister of Silly Walks
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Age: 25
Location: Miami, FL / Atlanta, GA

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 4:43 pm

This for Timothy Higgins 2?
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Cody
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PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 4:54 pm

I designed a 13in dual spinner and people were telling me i was crazy
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That Guy
samurai jesus
samurai jesus


People Skills: 2607
Registration date: 2009-03-16
Age: 22
Location: Pinecrest, Florida

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 4:59 pm

Jeff L wrote:
This for Timothy Higgins 2?

No Timothy Higgins 1 had an 18 inch weapon and we actually made it larger, we added on some other pieces and it ended up being more like 23.5 inch diameter by the 2nd match.

But Timothy Higgins is Jake's robot; I didn't complete my design for my robot this year fast enough, so I ended up working with Jake; that's not gonna happen next year.

Cody Harris wrote:
I designed a 13in dual spinner and people were telling me i was crazy
you were. because it was a dual spinner. I originally wanted to do that, but when i weighed the weapon we had on Jake's bot, I decided that a dual spinner wasn't happening at 18 inches.
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Jeff L
Minister of Silly Walks
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People Skills: 3235
Registration date: 2009-03-14
Age: 25
Location: Miami, FL / Atlanta, GA

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 5:01 pm

Remember, this is someone from the team that built a 8+ inch diameter drum as well as a 6 inch diameter drum, as well as a 120 with armor thick enough to only receive 1/6th inch deep scratches from a full-on spinner hit. Overkill is their business.
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Cody
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Registration date: 2009-03-16

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 5:02 pm

my disks actually didnt even weigh that much it was just the diameter every one on the RFL forum went nuts on me about. Do you have any pictures of Timmothy Higgins?
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That Guy
samurai jesus
samurai jesus


People Skills: 2607
Registration date: 2009-03-16
Age: 22
Location: Pinecrest, Florida

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 5:04 pm

You know what's even more crazy? our robot weighed 13.5 pounds. and our weapon itself weighed something like 4 pounds. Nope Cody, I'm sorry, I don't have any pictures, somebody else might. I'm almost positive Senai does, cuz I'm pretty sure he took a picture of the robot where Axiom took a clean, almost 1/2 inch chunk out of the robot.
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Cody
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PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 5:09 pm

one of the teams up heres robot was way under weight so jokingly i told them to put a roll of quarters in it
To my suprise they showed up at the final comp with a roll of quarters in it
14.98 lbs
Wierd lol
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That Guy
samurai jesus
samurai jesus


People Skills: 2607
Registration date: 2009-03-16
Age: 22
Location: Pinecrest, Florida

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 5:15 pm

how much were they before the quarters?
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That Guy
samurai jesus
samurai jesus


People Skills: 2607
Registration date: 2009-03-16
Age: 22
Location: Pinecrest, Florida

PostSubject: Re: Horizontal Spinner speed?   Wed May 06, 2009 5:21 pm

Alex Udanis wrote:
just to give everyone an idea rugburn spins under 3k
Really!? I would not have guessed that at all. I was thinking probably around somewhere between 3k and 5.5k
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