Go to Post "there are two types of underprivileged teams; the ones who whine about being underprivileged and the ones that work to become privileged". - Undertones [more]
Home
Go Back   Chief Delphi > FIRST > General Forum
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #14   Spotlight this post!  
Unread 23-07-2003, 01:22
Keith Chester's Avatar
Keith Chester Keith Chester is offline
HGFSP
FRC #0025 (Team 25)
Team Role: Alumni
 
Join Date: Mar 2002
Rookie Year: 2002
Location: North Brunswick, NJ
Posts: 382
Keith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to behold
Send a message via AIM to Keith Chester
Our robot was designed to have maximum speed and power, without EVER tripping a breaker. And we never did. Save the first round of the FIRST National finals. Oi! (We went through every round of Curie plus the two in the semifinals of the Nationals. Way too much for that machine).

How did we avoid tripping a breaker through all of that? Did we have small tires? Nope, 8 3/4 now, nearly 9 inches with extra layer of rubber with our special tread cut not yet ripped off. Cut back on programming? Only on one side to make the bot go straight - even then, very minimal.

Transmissions? A one speed gearbox? Custom gearbox? Definately! 4:1 gear ratio from the drill gearbox to each of three wheels, powered by an atwood geared down to the drill's speed and then put into the same 4:1 system. They work together.

But what keeps us for tripping? From wasting battery power? From simply overheating those motors or, in this case, the breaker and thus tripping it?

Simple. Rarely move your bot.
The 25 trade secret we designed in 2002 and built upon this year for our braking system. Our brakes, which I will be glad to show you, consists of two servos, one on each side. When activated, the entire gear system is dead. It is quite literally impossible for any robot in FIRST to turn our wheels. It's possible to move us, as it's been done before, but we are nothing but a dead weight with an amazing amount of traction due to tires.
Why does this help?

It allows us to conserve battery strength, keep motors cool, and even keeps the entire system, including the breaker, in tip top condition. We tripped the breaker in Finals because it was the 9th match in a row without stopping for our dear Evil Machine.

Then again, maybe it was just fate.
__________________
A proud graduate of 25.
Students. Teammates. Brothers.
Proud member of R.I.N.O.S., Rookies In Need Of Support.
Reply With Quote
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Gearbox Lord Nerdlinger Motors 20 15-07-2003 00:38
URGENT!! Need OI power brick specs for 7AM demo tomorrow!!! kmcclary Electrical 8 10-10-2002 10:56
Control System Power Al Skierkiewicz Technical Discussion 0 25-03-2002 09:04
power of globe motor with gear box? Ken Leung Motors 5 21-11-2001 13:43
Max mechanical power of motors, how is it useful? Ken Leung Motors 1 09-11-2001 14:15


All times are GMT -5. The time now is 07:39.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi