Go to Post My suggestion is to first focus in on your drive base. Get it running, and drive it into the ground and see what breaks. Then fix it. Rinse wash and repeat. - Andy A. [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rating: Thread Rating: 4 votes, 4.50 average. Display Modes
  #256   Spotlight this post!  
Unread 21-04-2011, 03:48
waialua359's Avatar
waialua359 waialua359 is offline
Mentor
AKA: Glenn
FRC #0359 (Hawaiian Kids)
Team Role: Mentor
 
Join Date: Apr 2003
Rookie Year: 2000
Location: Waialua, HI
Posts: 3,305
waialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond reputewaialua359 has a reputation beyond repute
Re: Minibot climb rate

Our team is pretty excited about our new and improved minibot.
It is currently performing between 1.1 - 1.2 seconds from dead start (no ramp).
Our old one was good enough in weeks 2 and 4, but knew that it had to improve to stay with the mix of teams that are hovering above, at, or right below the 1 second mark.
__________________

2016 Hawaii Regional #1 seed, IDesign, Safety Award
2016 NY Tech Valley Regional Champions, #1 seed, Innovation in Controls Award
2016 Lake Superior Regional Champions, #1 seed, Quality Award, Dean's List
2015 FRC Worlds-Carver Division Champions
2015 Hawaii Regional Champions, #1 seed.
2015 Australia Regional Champions, #2 seed, Engineering Excellence Award
2015 Inland Empire Regional Champions, #1 seed, Industrial Design Award
2014 OZARK Mountain Brawl Champions, #1 seed.
2014 Hawaii Regional Champions, #1 seed, UL Safety Award
2014 Dallas Regional Champions, #1 seed, Engineering Excellence Award
2014 Northern Lights Regional Champions, #1 seed, Entrepreneurship Award
2013 Championship Dean's List Winner
2013 Utah Regional Champion, #1 seed, KP&B Award, Deans List
2013 Boilermaker Regional Champion, #1 seed, Motorola Quality Award
2012 Lone Star Regional Champion, #1 seed, Motorola Quality Award
2012 Hawaii Regional Champions #1 seed, Motorola Quality Award
  #257   Spotlight this post!  
Unread 21-04-2011, 04:13
jblay's Avatar
jblay jblay is offline
Here comes StuyPulse
AKA: Joe Blay
FRC #0694 (StuyPulse)
Team Role: Coach
 
Join Date: Feb 2008
Rookie Year: 2006
Location: New York, NY
Posts: 984
jblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond repute
Re: Minibot climb rate

Quote:
Originally Posted by billbo911 View Post
OK, more info and a video.

Kevin,
Shifting the battery up to the top and placing some surgical tubing at the back of the battery did the trick. Now our pivot point is the farthest point from the pole. This video is taken with a fairly depleted battery.

http://www.youtube.com/watch?v=P89k0hlHd1E

Either,

More accurate measurements:

Weight is 10052g, or, 2.32 lb.
Wheel diameter is effectively .45" when compressed against the pole.

So, based on our earlier discussions, it is really close to ideal.
It seemed to me in the initial video like the plate on the top of your tower was slanted which may have caused your minibot to fly off. Its a problem we had before connecticut and then I realized that was the reason and we never had the issue again.

I don't know if you tested with a full battery or not but the battery being full would change the speed of the minibot I imagine and cause it to go slower and could be part of the fix for the minibot flying off the pole which isn't an actual fix.
__________________
It's pronounced StighPulse like HighPulse
2016 Curie Champions
2016 New York City Champions
2016 New York City Engineering Inspiration
2015 New York City Finalists
2013 New York City Champions
2012 Connecticut Chairman's
2011 Connecticut Chairman's
2010 Connecticut Chairman's

2010 New York City Champions
2008 New York City Engineering Inspiration
2007 New York City Finalists
2006 New York City Finalists
2005 New York City Chairman's
2003 New York City Champions
2002 New York City Engineering Inspiration
2001 New York City Finalists
  #258   Spotlight this post!  
Unread 21-04-2011, 07:01
wireties's Avatar
wireties wireties is offline
Principal Engineer
AKA: Keith Buchanan
FRC #1296 (Full Metal Jackets)
Team Role: Mentor
 
Join Date: Jan 2006
Rookie Year: 2004
Location: Rockwall, TX
Posts: 1,170
wireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond reputewireties has a reputation beyond repute
Send a message via AIM to wireties
Re: Minibot climb rate

Quote:
Originally Posted by AlDee View Post
At the beginning of the build season, someone had suggested magnets and we quickly dismissed the idea, thinking with the potential weights involved, magnets would not be practical, except perhaps to hold a latching mechanism closed. As the build season progressed we experimented with many differnt concepts and prototypes. I favored a balanced approach as you describe. I found that anytime we would get close, one tweak would throw the whole thing off. When someone put together a prototype with a rare earth magnet, it became very simple. No muss no fuss, just get it to the pole and climb. That was the direction we went and it worked very well.
I surrender and am ordering magnets from K&J to try before the off-season events!
  #259   Spotlight this post!  
Unread 21-04-2011, 08:23
Brandon Holley's Avatar
Brandon Holley Brandon Holley is offline
Chase perfection. Catch excellence.
AKA: Let's bring CD back to the way it used to be
FRC #0125 (NU-TRONs, Team #11 Alumni (GO MORT))
Team Role: Engineer
 
Join Date: Jan 2004
Rookie Year: 2001
Location: Boston, MA
Posts: 2,593
Brandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond reputeBrandon Holley has a reputation beyond repute
Send a message via AIM to Brandon Holley
Re: Minibot climb rate

Quote:
Originally Posted by jblay View Post
I don't know if you tested with a full battery or not but the battery being full would change the speed of the minibot I imagine and cause it to go slower and could be part of the fix for the minibot flying off the pole which isn't an actual fix.
I'm a little confused...you are saying that a full battery will cause the minibot to go slower??

-Brando
__________________
MORT (Team 11) '01-'05 :
-2005 New Jersey Regional Chairman's Award Winners
-2013 MORT Hall of Fame Inductee

NUTRONs (Team 125) '05-???
2007 Boston Regional Winners
2008 & 2009 Boston Regional Driving Tomorrow's Technology Award
2010 Boston Regional Creativity Award
2011 Bayou Regional Finalists, Innovation in Control Award, Boston Regional Finalists, Industrial Design Award
2012 New York City Regional Winners, Boston Regional Finalists, IRI Mentor of the Year
2013 Orlando Regional Finalists, Industrial Design Award, Boston Regional Winners, Pine Tree Regional Finalists
2014 Rhode Island District Winners, Excellence in Engineering Award, Northeastern University District Winners, Industrial Design Award, Pine Tree District Chairman's Award, Pine Tree District Winners
2015 South Florida Regional Chairman's Award, NU District Winners, NEDCMP Industrial Design Award, Hopper Division Finalists, Hopper/Newton Gracious Professionalism Award
  #260   Spotlight this post!  
Unread 21-04-2011, 08:57
Ether's Avatar
Ether Ether is offline
systems engineer (retired)
no team
 
Join Date: Nov 2009
Rookie Year: 1969
Location: US
Posts: 8,097
Ether has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond repute
Re: Minibot climb rate

Quote:
Originally Posted by waialua359 View Post
Our team is pretty excited about our new and improved minibot.
It is currently performing between 1.1 - 1.2 seconds from dead start (no ramp).
Could you tell us more about it?

- weight?

- wheel (shaft) diameter?

- wheel (shaft) tread material?

- magnets or something else?

- have you measured the friction?


  #261   Spotlight this post!  
Unread 21-04-2011, 09:26
Alpha Beta's Avatar
Alpha Beta Alpha Beta is offline
Strategy, Scouting, and LabVIEW
AKA: Mr. Aaron Bailey
FRC #1986 (Team Titanium)
Team Role: Coach
 
Join Date: Mar 2008
Rookie Year: 2007
Location: Lee's Summit, Missouri
Posts: 763
Alpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond reputeAlpha Beta has a reputation beyond repute
Re: Minibot climb rate

Quote:
Originally Posted by Brandon Holley View Post
I'm a little confused...you are saying that a full battery will cause the minibot to go slower??

-Brando
Well, of course. A fully charged battery has all of those extra electrons to lug around. Oh wait...that's not right. They're still there just switching between the anode and cathode. I guess I'm confused too.
__________________
Regional Wins: 2016(KC), 2015(St. Louis, Queen City), 2014(Central Illinois, KC), 2013(Hub City, KC, Oklahoma City), 2012(KC, St. Louis), 2011(Colorado), 2010(North Star)
Regional Chairman's Award: 2014(Central Illinois), 2009(10,000 Lakes)
Engineering Inspiration: 2016(Smoky Mountain), 2012(Kansas City), 2011(Denver)
Dean's List Finalist 2016(Jacob S), 2014(Cameron L), 2013(Jay U), 2012(Laura S), 2011(Dominic A), 2010(Collin R)
Woodie Flowers Finalist 2013 (Aaron Bailey)
Championships: Sub-Division Champion (2016), Finalist (2013, 2010), Semifinalist (2014), Quaterfinalist (2015, 2012, 2011)
Other Official Awards: Gracious Professionalism (2013) Entrepreneurship (2013), Quality (2015, 2015, 2013), Engineering Excellence (Champs 2013, 2012), Website (2011), Industrial Design (Archimedes/Tesla 2016, 2016, 2015, Newton 2014, 2013, 2011), Innovation in Control (2014, Champs 2010, 2010, 2008, 2008), Imagery (2009), Regional Finalist (2016, 2015, 2008)
  #262   Spotlight this post!  
Unread 21-04-2011, 10:43
Team 288's Avatar
Team 288 Team 288 is offline
Team 288 - Spare Parts
FTC #0288 (Spare Parts)
Team Role: Coach
 
Join Date: Oct 2008
Rookie Year: 2004
Location: St. Louis
Posts: 32
Team 288 is a jewel in the roughTeam 288 is a jewel in the roughTeam 288 is a jewel in the roughTeam 288 is a jewel in the rough
Re: Minibot climb rate

Quote:
Originally Posted by Ether View Post
Could you tell us more about it?

- weight?

- wheel (shaft) diameter?

- wheel (shaft) tread material?

- magnets or something else?

- have you measured the friction?

I can probably answer for this person, by inserting 931's minibot, instead of theirs.

931 has a minibot that climbs justbelow the 1 second mark.

Weight : 2.2 lbs

Wheel shaft diameter : .45 inches

Wheel shaft material : Electrical tape(standard)

27 lb pull magnet

No. =)

We'll have 6 of these at worlds and are willing to let other teams borrow (teams in Archimedes get priority)

Here's a video with a 7 foot pole. We got .7 seconds for total climb time.

http://www.youtube.com/watch?v=cUSCBbhu4JM
__________________
Charlie Blair
Electronics Instructor at Gateway Institute of Technology High School
Head Coach for FTC teams at Gateway Institute of Technology High School since 2005
Planning Committee Member, St. Louis Regional FTC
Mentor to Team 931 Perpetual Chaos since 2004
FRC Volunteer
  #263   Spotlight this post!  
Unread 21-04-2011, 12:07
jblay's Avatar
jblay jblay is offline
Here comes StuyPulse
AKA: Joe Blay
FRC #0694 (StuyPulse)
Team Role: Coach
 
Join Date: Feb 2008
Rookie Year: 2006
Location: New York, NY
Posts: 984
jblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond reputejblay has a reputation beyond repute
Re: Minibot climb rate

Quote:
Originally Posted by Brandon Holley View Post
I'm a little confused...you are saying that a full battery will cause the minibot to go slower??

-Brando
Didnt see that I wrote that backwards the first time. I meant the battery not being full would slow the minibot down cause before the video he says that the battery was not full.
__________________
It's pronounced StighPulse like HighPulse
2016 Curie Champions
2016 New York City Champions
2016 New York City Engineering Inspiration
2015 New York City Finalists
2013 New York City Champions
2012 Connecticut Chairman's
2011 Connecticut Chairman's
2010 Connecticut Chairman's

2010 New York City Champions
2008 New York City Engineering Inspiration
2007 New York City Finalists
2006 New York City Finalists
2005 New York City Chairman's
2003 New York City Champions
2002 New York City Engineering Inspiration
2001 New York City Finalists

Last edited by jblay : 21-04-2011 at 12:10.
Closed Thread


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 20:39.

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