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 Donatello-Beetleweight

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Koolaid64
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PostSubject: Donatello-Beetleweight    Wed Mar 09, 2011 1:04 pm

so i started working on a new beetle, for this one i wanted to build something long term so i decided to do a FBS

i designed it to be as compact as possible with a footprint of 5" x 6" so the shell should be around 7 1/2" top dia and 9" bottom dia 1 3/8" tall


and i modded an brushless motor to be as low profile as possible


and with everything it comes in at 25oz so i figure after i get the pulley assemble and shaft it it should be around 28-30 oz giving me somewhere around 18-20 oz for a shell




Last edited by I am ZORDON on Wed Apr 13, 2011 12:03 pm; edited 1 time in total
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Koensig



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PostSubject: Re: Donatello-Beetleweight    Thu Mar 10, 2011 5:26 pm

That's a cool bot. One question though... What gearmotors are you using?
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Koolaid64
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PostSubject: Re: Donatello-Beetleweight    Thu Mar 10, 2011 5:31 pm

1000 rpms, won them at moto
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Koensig



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PostSubject: Re: Donatello-Beetleweight    Thu Mar 10, 2011 5:41 pm

hmm... 1000 rpm seems kinda fast, how fast does the robot actually go?
They look kinda like these motors http://www.robotcombat.com/products/0-B16.html What voltage are you running them at?
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PostSubject: Re: Donatello-Beetleweight    Thu Mar 10, 2011 9:04 pm

I've had good experiences with Robot Marketplace, though I'll agree that they are quite expensive. These motors look very similar to the B16s except for less than half the price. Thanks for showing me this site.
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Koolaid64
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PostSubject: Re: Donatello-Beetleweight    Fri Mar 11, 2011 12:08 am

well the bot runs on 1 1/4" tires so the 1000 rpm motors are a pretty awesome speed, they keep the bot quick but not uncontrollable

and if you shop around on ebay you can find them even cheaper then that, i got a pair last week for around 8$ each. you just have to be willing to wait out the shipping
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Cody
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PostSubject: Re: Donatello-Beetleweight    Fri Mar 11, 2011 12:35 am

Koolaid64 wrote:
well the bot runs on 1 1/4" tires so the 1000 rpm motors are a pretty awesome speed, they keep the bot quick but not uncontrollable

and if you shop around on ebay you can find them even cheaper then that, i got a pair last week for around 8$ each. you just have to be willing to wait out the shipping

and make sure you get the right ones! There are some that look the same but are duds
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Koolaid64
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PostSubject: Re: Donatello-Beetleweight    Sat Mar 19, 2011 9:25 pm

today i did some shell drawings and heres what i've come up with

shell weights 12oz has a top dia of 7 1/8" and a bottom dia of 9" and is 1 1/4" tall


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Evan Steeves
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PostSubject: Re: Donatello-Beetleweight    Mon Mar 28, 2011 4:59 pm

looks awesome kyle any idea on the final shell speed?

and how thick is the shell going to be?

also will you be using grips with replaceable teeth or welded on teeth?
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Koolaid64
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PostSubject: Re: Donatello-Beetleweight    Mon Mar 28, 2011 10:05 pm

in theory the top speed should be around 7k

the shell is going to be made out of 1/16" ti

and i plan on using a ziggo style tooth, meaning big booty hammers
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SenaiERI
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PostSubject: Re: Donatello-Beetleweight    Mon Mar 28, 2011 11:25 pm

Koolaid64 wrote:
in theory the top speed should be around 7k

the shell is going to be made out of 1/16" ti

Ok, firstly, badass dude! I'm lovin the stuff you post on here.
Secondly, titanium!? Heeeells yeah. Good man.

Ok, here's where we go south. Direct drive for a FBS? Bad idea dude, after your first hit, your motor will never run true again. Trust me, I've seen it happen time and time again. Plus, your spin up time will be incredibly slow.

And how are you calculating the 7k? Don't tell me that's what your motor is rated for. Cause your shell is going to affect is moment of inertia and won't give you that 7k.

Nice work though. We must battle one day.
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Cody
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PostSubject: Re: Donatello-Beetleweight    Mon Mar 28, 2011 11:29 pm

SenaiERI wrote:
Koolaid64 wrote:
in theory the top speed should be around 7k

the shell is going to be made out of 1/16" ti

Ok, firstly, badass dude! I'm lovin the stuff you post on here.
Secondly, titanium!? Heeeells yeah. Good man.

Ok, here's where we go south. Direct drive for a FBS? Bad idea dude, after your first hit, your motor will never run true again. Trust me, I've seen it happen time and time again. Plus, your spin up time will be incredibly slow.

And how are you calculating the 7k? Don't tell me that's what your motor is rated for. Cause your shell is going to affect is moment of inertia and won't give you that 7k.

Nice work though. We must battle one day.

He generally uses round belts so direct drive isnt going to hurt his motors at all, plus the motors he uses are generally pretty inexpensive.
He has more bot building experience the over 3/4 of this forum, I'm sure those arent just motor specs
Plus this is a beetleweight not a 15
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SenaiERI
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PostSubject: Re: Donatello-Beetleweight    Mon Mar 28, 2011 11:38 pm

Oh well poo, I thought we were all noobs on this forum.

And I couldn't tell from the drawing. Direct drive = spawn of satan.

P.S. I hate the corrective spelling on this forum. I'LL CURSE WHEN I WANNA CURSE ShamWOW! IT!
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Koolaid64
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PostSubject: Re: Donatello-Beetleweight    Tue Mar 29, 2011 12:23 am

ya sorry about that, the drawling was just meant to check clearances on the shell not so much for show.
anyway heres what the bot looks like now


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PostSubject: Re: Donatello-Beetleweight    Tue Mar 29, 2011 12:34 am

Its looks awesome!
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SenaiERI
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PostSubject: Re: Donatello-Beetleweight    Tue Mar 29, 2011 12:37 am

Ohhh purty.
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PostSubject: Re: Donatello-Beetleweight    Tue Mar 29, 2011 12:40 am

as for the shell i have the ti and the design but sense im not in the edm class i have to find someone else to cut it out for me
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PostSubject: Re: Donatello-Beetleweight    Tue Mar 29, 2011 5:35 pm

That's epic. I want to see it in action.
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PostSubject: Re: Donatello-Beetleweight    Tue Mar 29, 2011 6:23 pm

Sick design dude ... Awesome
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Koolaid64
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PostSubject: Re: Donatello-Beetleweight    Tue Mar 29, 2011 10:09 pm

thanks, and ya i can't wait till its finished. its hard to build a good FBS and im hopping this turns out to be a good one
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PostSubject: Re: Donatello-Beetleweight    Tue Mar 29, 2011 10:27 pm

well good luck with it man looks cool.

Koolaid64 wrote:
thanks, and ya i can't wait till its finished. its hard to build a good FBS and im hopping this turns out to be a good one
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Will Bales
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PostSubject: Re: Donatello-Beetleweight    Thu Mar 31, 2011 1:59 am

That thing looks great!
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Camden W
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PostSubject: Re: Donatello-Beetleweight    Wed May 04, 2011 12:40 am

you sir have inspired a design for an antweight I love you hope your shell turns out perfect, with holes drilled in the right spot! Wink
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Koolaid64
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PostSubject: Re: Donatello-Beetleweight    Wed May 04, 2011 11:29 am

well the fbs is actually on hold, the piece on ti i have isn't big enough for the full cut out. so for now im throwing the blade from torger on it and putting a ring of uhmw around the body. im going to redesign and rebuild when i get a hold of the ti i need
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Evan Steeves
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PostSubject: Re: Donatello-Beetleweight    Sat May 07, 2011 4:08 pm

NOOOOO i was so excited to see how it was going to turn out .... lol
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