Go to Post We should all just be humble, courteous, and act like gentlemen (or ladies) on these forums, and not fill it with yakking about who's drive train is better. - Veselin Kolev [more]
Home
Go Back   Chief Delphi > Old Forum Archives > 1999
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
Thread Tools Rating: Thread Rating: 10 votes, 5.00 average. Display Modes
  #1   Spotlight this post!  
Unread 23-06-2002, 21:52
archiver archiver is offline
Forum Archival System
#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,214
archiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond repute
Gyros (NOT the sandwich)

Posted by Dan, Student on team #10, BSM, from Benilde-St. Margaret's and Banner Engineering.

Posted on 2/26/99 10:19 PM MST



What's the word at regionals about gyros? Does Beatty have a post-game autonomous mode like we predicted? OK, it's just a little illegal and very impossible . .but let's hear it. Speak up all yee at regionals. :-Dan


__________________
This message was archived from an earlier forum system. Some information may have been left out. Start new discussion in the current forums, and refer back to these threads when necessary.
  #2   Spotlight this post!  
Unread 23-06-2002, 21:52
archiver archiver is offline
Forum Archival System
#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,214
archiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond repute
Re: Gyros (NOT the sandwich)

Posted by Jerry Eckert, Engineer on team #140 from Tyngsboro, MA High School and New England Prototype/Brooks Automation.

Posted on 2/26/99 10:46 PM MST


In Reply to: Gyros (NOT the sandwich) posted by Dan on 2/26/99 10:19 PM MST:



: Does Beatty have a post-game autonomous mode like we predicted? OK, it's just a little illegal and very impossible . .but let's hear it. Speak up all yee at regionals. :-Dan

If I interpret your question correctly, that is impossible.

At the end of a match power to the transmitter is removed. When the master CPU in the receiver (to which we have no access) ceases to receive data from the transmitter it disables
all outputs. When the outputs are disabled the control program is not able to manipulate any mechanisms on the robot.

- Jerry



__________________
This message was archived from an earlier forum system. Some information may have been left out. Start new discussion in the current forums, and refer back to these threads when necessary.
  #3   Spotlight this post!  
Unread 23-06-2002, 21:52
archiver archiver is offline
Forum Archival System
#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,214
archiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond repute
Re: Gyros (NOT the sandwich)

Posted by Dan, Student on team #10, BSM, from Benilde-St. Margaret's and Banner Engineering.

Posted on 2/26/99 10:56 PM MST


In Reply to: Re: Gyros (NOT the sandwich) posted by Jerry Eckert on 2/26/99 10:46 PM MST:



Yes you did interpret it correctly and you gave the same answer my coach did when my insane friend thought it up. But all of that fantasy aside, I'd like to hear what's being done with the gyros. :-Dan
: If I interpret your question correctly, that is impossible.

: At the end of a match power to the transmitter is removed. When the master CPU in the receiver (to which we have no access) ceases to receive data from the transmitter it disables
: all outputs. When the outputs are disabled the control program is not able to manipulate any mechanisms on the robot.

: - Jerry





__________________
This message was archived from an earlier forum system. Some information may have been left out. Start new discussion in the current forums, and refer back to these threads when necessary.
  #4   Spotlight this post!  
Unread 23-06-2002, 21:52
archiver archiver is offline
Forum Archival System
#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,214
archiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond repute
Not Impossible at All

Posted by Dodd Stacy, Engineer on team #95, Lebanon Robotics Team, from Lebanon High School and CRREL/CREARE.

Posted on 2/27/99 6:35 AM MST


In Reply to: Re: Gyros (NOT the sandwich) posted by Dan on 2/26/99 10:56 PM MST:



There are any number of ways to perform actions like lifting a floppy basket in the 10 second period after the match ends and power is removed from the transmitter. Any approach which uses stored energy, stretched surgical tubing for example, can work. A motor can be jumpered before a match to wind down the lifting arm from its raised position. The same motor with its leads shorted can then act as a brake retarding the rate at which the mechanism unfolds after being unlatched, to honor the spirit of the rule on energy release rate. The latch may be actively released at the last moment of power availability, or some sort of two stage latch trigger that requires power to maintain the latch once armed in the course of the match might be used. This may not be a particularly smart way to do things, but something related could be made to work. We thought about an after-the-buzzer lift, but it was one of many ideas that were set aside under the pressures of time. I'll be very surprised not to see some teams with delayed lift devices.

Dodd


__________________
This message was archived from an earlier forum system. Some information may have been left out. Start new discussion in the current forums, and refer back to these threads when necessary.
  #5   Spotlight this post!  
Unread 23-06-2002, 21:53
archiver archiver is offline
Forum Archival System
#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,214
archiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond repute
Re: Gyros (NOT the sandwich)

Posted by Matt Young, Student on team #217, Team Macomb, from MMSTC and Ford.

Posted on 2/28/99 7:43 PM MST


In Reply to: Gyros (NOT the sandwich) posted by Dan on 2/26/99 10:19 PM MST:



It is possible to have an after round lifting device. I know of one team, can't remember the name but they are sponsored by CDW, they have a floppy lift that uses some sort of gas cylinders that when the trigger is released it goes up without power. They were at the Motorola Chicago regional, if they or anyone that was there sees this post and wishes to add more detail please do, I did not talk with them for very long.


__________________
This message was archived from an earlier forum system. Some information may have been left out. Start new discussion in the current forums, and refer back to these threads when necessary.
  #6   Spotlight this post!  
Unread 23-06-2002, 21:53
archiver archiver is offline
Forum Archival System
#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,214
archiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond reputearchiver has a reputation beyond repute
Re: Gyros (NOT the sandwich)

Posted by Brad Pflum, Coach on team #192, Gunn Robotics Team, from Gunn High School and Nasa Ames, Sun Microsystems.

Posted on 2/28/99 11:56 PM MST


In Reply to: Gyros (NOT the sandwich) posted by Dan on 2/26/99 10:19 PM MST:



: What's the word at regionals about gyros? Does Beatty have a post-game autonomous mode like we predicted? OK, it's just a little illegal and very impossible . .but let's hear it. Speak up all yee at regionals. :-Dan

We put a Gyro on our arm. It senses any unintensional movement in the arm and corrects by powering the motors.
The arm also has an aray of limit switchs which are used to recalibrate the gyro every time it passes the sensors.
We also use it to get the arm perfectly vertical regardless of the base's position (if it were half on the puck, for example, a simpler system would pout the arm perpendicular to the base while our system keeps it perp to the ground) when it's holding the basket o' floppies up.
It works great & was all done by a (quite brilliant) sophomore, Ben Herbert.

One problem is that it sometimes overcorrects and due to the slowness and inconsistancies of the control box, the arm sometimes goes into a seisure and occilates uncontrolably. it's still really neat & i wish i knew enough programing to do that kind of stuff

-Brad
Senior at Gunn High School
Co-Captain and Coach, Gunn Robotics Team


__________________
This message was archived from an earlier forum system. Some information may have been left out. Start new discussion in the current forums, and refer back to these threads when necessary.
 


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 Off
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Programming Gyros goegan31 Programming 33 19-05-2003 20:05
Gyros!! RAWdealer59 Programming 1 12-02-2003 16:46
gyros archiver 2001 6 24-06-2002 02:35
Gyros archiver 2000 3 23-06-2002 22:58


All times are GMT -5. The time now is 00:42.

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