Go to Post While grandmothers are pretty cool, I would be hesitant in letting them determine what is and is not a robot. - Kellen Hill [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

 
Reply
Thread Tools Rate Thread Display Modes
  #16   Spotlight this post!  
Unread 09-02-2003, 01:28
Ianworld's Avatar
Ianworld Ianworld is offline
AKA Ian Ferguson
AKA: Ian Ferguson
FRC #0694 (StuyPulse)
Team Role: College Student
 
Join Date: Jan 2003
Rookie Year: 2002
Location: New York City, Stuyvesant H.S.
Posts: 366
Ianworld has much to be proud ofIanworld has much to be proud ofIanworld has much to be proud ofIanworld has much to be proud ofIanworld has much to be proud ofIanworld has much to be proud ofIanworld has much to be proud ofIanworld has much to be proud ofIanworld has much to be proud of
Send a message via AIM to Ianworld
our arm looks similar to yours so i'm curious to see how well it throws. We have 3 joints(base, elbow, and the grabber at the end is on a short joint) If you roll that all up with a box and then open it as the arm swings over the top of the robot we can get a cool trebuchet like effect. Now all it has to do is be finished... maybe tomorrow. I'll tell you if it works ^_^

With a 9 foot arm like ours it doesn't have to be moving fast to make it over the ramp. Its already sooo high up... Eat that tower of Babel!

Anyway the arm theoretically does 90 degrees in 1.2 seconds and that means the end is moving about 15 feet per second. but those calculations are very optimistic. Earlier in the competition i calculated that the box would have to be going 20 feet per second or something close to that to get about 30-40 feet of distance which is about 80 foot pounds i believe. But that was calculated from the ground. I guess if you combine that movement with that of our second joint the box would be moving at approximatly 20 feet per second. So maybe just maybe it will work.


P.S. i don't think our ceilings are high enough to test this....
__________________
Team Website
Reply With Quote
  #17   Spotlight this post!  
Unread 09-02-2003, 11:06
matt111 matt111 is offline
Registered User
#1024 (McKenzie Kilabytes)
 
Join Date: Jan 2003
Location: indianapolis, IN
Posts: 171
matt111 will become famous soon enough
correct answers (hopefully)

i can answer some of the questions

Stephen P looks sweet.... what is the air compressor for?

last time i checked to was for our pnematics but i dont know if im at liberty to reveal what they do sorry


Clark Gilbert Looks very cool, it will be very interesting to watch your robot toss totes across the field.

Woohoo! 2001 TechnoKat robot in the background!

yes ur correct thanks technokats we borrowed it from u at the clinic thing, it was a big help in showing sponsers what our bot might look like

and lastly
srjjs Nice treads. Is your robot going to be under 14" tall? I can't really tell from the picture.

at last count i believe it was something like 12 inches tall but again i just sitting in fornt of a computer allday and micheal actually builds the thing


im really glad everyone is taking notice of 1024 and wait till u see our animation, we have a strong foundation and a bright future


over and out

swan
Reply With Quote
  #18   Spotlight this post!  
Unread 09-02-2003, 11:15
GregT GregT is offline
Registered User
no team
 
Join Date: Jul 2001
Rookie Year: 2001
Location: FL
Posts: 400
GregT will become famous soon enough
Send a message via AIM to GregT
Quote:
Originally posted by Ianworld
our arm looks similar to yours so i'm curious to see how well it throws. We have 3 joints(base, elbow, and the grabber at the end is on a short joint) If you roll that all up with a box and then open it as the arm swings over the top of the robot we can get a cool trebuchet like effect. Now all it has to do is be finished... maybe tomorrow. I'll tell you if it works ^_^

With a 9 foot arm like ours it doesn't have to be moving fast to make it over the ramp. Its already sooo high up... Eat that tower of Babel!

Anyway the arm theoretically does 90 degrees in 1.2 seconds and that means the end is moving about 15 feet per second. but those calculations are very optimistic. Earlier in the competition i calculated that the box would have to be going 20 feet per second or something close to that to get about 30-40 feet of distance which is about 80 foot pounds i believe. But that was calculated from the ground. I guess if you combine that movement with that of our second joint the box would be moving at approximatly 20 feet per second. So maybe just maybe it will work.


P.S. i don't think our ceilings are high enough to test this....
How long is your arm, and is that 1.2s all under constent acceleration?

I'm curious, because earlier this year I ruled out catapult bots as physically impossible (of the very close equivlant of, unless you can build a massless arm connected to 4 motors through a frictionless axle...)

Greg
__________________
The above was my opinion. I'm wrong a lot. I'm sarcastic a lot. Try not to take me too seriously.
Reply With Quote
  #19   Spotlight this post!  
Unread 09-02-2003, 15:59
Michael Long's Avatar
Michael Long Michael Long is offline
Registered User
FRC #1024 (Kill-a-bytes)
Team Role: Engineer
 
Join Date: Feb 2003
Rookie Year: 1999
Location: indianapolis
Posts: 33
Michael Long is on a distinguished road
Send a message via AIM to Michael Long Send a message via Yahoo to Michael Long
us cataputing boxes is completely out.. but the arm is moving now with pheumatics.... its working very nicely... since we are going under the bar we didnt have the space to counter weight the arm and get it cranking enough to toss them....
__________________
Never Argue with an idiot...
They will drag you down to their level...
and beat you with experience...
Reply With Quote
  #20   Spotlight this post!  
Unread 09-02-2003, 22:46
jburstein jburstein is offline
Registered User
#0008
 
Join Date: Jan 2003
Location: Palo Alto
Posts: 21
jburstein is an unknown quantity at this point
Quote:
earlier this year I ruled out catapult bots as physically impossible (of the very close equivlant of, unless you can build a massless arm connected to 4 motors through a frictionless axle...
You haven't heard of a thing called a spring have you? If you need the power of four motors then maybe you'd do better having one motor store energy, that way you don't burden yourself weight/power requirements of 4 motors and the accompanying transmission.
Reply With Quote
Reply


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


All times are GMT -5. The time now is 20:04.

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