Go to Post You don't need to prototype everything, just the stuff you want to work. - JVN [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
 
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 19-12-2008, 14:13
Pat Fairbank's Avatar
Pat Fairbank Pat Fairbank is offline
Circuit Breaker
FRC #0254 (The Cheesy Poofs)
Team Role: Engineer
 
Join Date: Mar 2003
Rookie Year: 2001
Location: San Jose, CA
Posts: 2,132
Pat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond reputePat Fairbank has a reputation beyond repute
Send a message via MSN to Pat Fairbank
Re: pic: 1503's Off-Season Project

Quote:
Originally Posted by Brandon Holley View Post
Just a quick question about the banebots wheels, because we were very strongly considering using them (we ordered several in different durometers, etc.)... Did you do any kind of testing with them? Such as, seeing if the hex within the polypropylene hub would strip out? Or if the urethane shears off when being pushed sideways?
Now that you mention it, I remember some issues with the Banebots wheels that I should share. We ordered some keyed and hexed wheels to test with, and weren't very happy with the quality of the wheel manufacturing. Some of the hexes were visibly off-centre, and produced as much as 1/8" of runout when mounted on hex shaft. We also found that some of the molded surfaces weren't always perpendicular or flat. So we gave up on the idea of being able to drive the wheels directly by hex or keyway, and instead made a fixture consisting of a 3-7/8" circle milled into a block of aluminium. We clamped each wheel into the fixture and ran a CNC program to mill out the wheel centres to 7/8" and drill a bolt hole circle matching the sprockets, using the OD to locate. So, our centre wheels are driven by the shaft via the keyed hub they are bolted to, and our front and back wheels are driven by the sprockets they are bolted to (and are mounted on dead axles).

As far as the tread material goes, I'm not concerned about it shearing off. We cut a wheel in half, and the outside of the molded plastic wheel has a section in the middle which sticks up into the tread (i.e. the tread/wheel interface is not flat). The adhesive also seems to be ridiculously strong.
__________________
Patrick Fairbank
Team 254 | Mentor (2012-)
Team 1503 | Mentor (2007-2011)
Team 296 | Alumnus (2001-2004) | Mentor (2005-2006)

patfairbank.com
Reply With Quote
  #2   Spotlight this post!  
Unread 30-12-2008, 02:50
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,515
sanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond repute
Re: pic: 1503's Off-Season Project

Any more updates on how the Banebots wheels are holding out? How's the handling and wear?
__________________
Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
Reply With Quote
  #3   Spotlight this post!  
Unread 30-12-2008, 12:20
Boommaster713's Avatar
Boommaster713 Boommaster713 is offline
Registered User
FRC #0932 (Circuit Chargers)
Team Role: Driver
 
Join Date: Dec 2008
Rookie Year: 2008
Location: Tulsa, OK
Posts: 11
Boommaster713 is an unknown quantity at this point
Re: pic: 1503's Off-Season Project

after a close look at how your electronics are laid out I have a few questions

1. On the cRIO I noticed that the first and last boxes (cant remember the name) are connected in series, I am wondering what purpose that has?

2. Have you noticed a performance issue with how your robot is so off balance, and would a sliding battery cause any additional problems with robot control?
Reply With Quote
  #4   Spotlight this post!  
Unread 30-12-2008, 15:13
computerboi1503 computerboi1503 is offline
Programmer/Driver/Spokesperson
AKA: A former me.
FRC #1503 (Spartonics)
 
Join Date: Jan 2008
Rookie Year: 2006
Location: Niagara Falls, Ontario, Canada
Posts: 29
computerboi1503 will become famous soon enoughcomputerboi1503 will become famous soon enough
Re: pic: 1503's Off-Season Project

Quote:
sanddrag
Any more updates on how the Banebots wheels are holding out? How's the handling and wear?
We have not been in the shop, due to the Christmas Break, since teh 19th, and even then there were very few hours on the robot. We have noticed a little peeling on the center wheels though, but no loss of traction as of yet. We still at this point have no real tests, (such as being pushed sideways, or any carpet testing,) as of yet.

Quote:
Boommaster713
after a close look at how your electronics are laid out I have a few questions

1. On the cRIO I noticed that the first and last boxes (cant remember the name) are connected in series, I am wondering what purpose that has?

2. Have you noticed a performance issue with how your robot is so off balance, and would a sliding battery cause any additional problems with robot control?
1. The modules that are connected in series is just to route power to both on one spot on the PDB.

2. The end with the battery is ALWAYS on the ground, and we have had next to no use on the front wheels, so its almost like driving a four wheel drive base rather than six. I am sure that when we get into serious testing we will balance this out with some weights, as we would like it to weigh 120 pounds during our testing.

Go ahead and fire more questions if you have any!

Nick
__________________
Reply With Quote
  #5   Spotlight this post!  
Unread 31-12-2008, 02:01
Tanwad11's Avatar
Tanwad11 Tanwad11 is offline
Tan the Man
AKA: Tanvir Bhullar
FRC #0011 (MORT)
Team Role: Mechanical
 
Join Date: Dec 2008
Rookie Year: 2004
Location: Budd Lake, NJ
Posts: 3
Tanwad11 is an unknown quantity at this point
Send a message via AIM to Tanwad11
Thumbs up Re: pic: 1503's Off-Season Project

Very nice and clean set up of your electronics.

Are most teams planning on adding lexan covering to their systems this year? Don't know if it'll be as much of a priority because of the better protected Jags.
__________________
Reply With Quote
  #6   Spotlight this post!  
Unread 31-12-2008, 11:29
computerboi1503 computerboi1503 is offline
Programmer/Driver/Spokesperson
AKA: A former me.
FRC #1503 (Spartonics)
 
Join Date: Jan 2008
Rookie Year: 2006
Location: Niagara Falls, Ontario, Canada
Posts: 29
computerboi1503 will become famous soon enoughcomputerboi1503 will become famous soon enough
Re: pic: 1503's Off-Season Project

Quote:
Tanwad11
Very nice and clean set up of your electronics.

Are most teams planning on adding lexan covering to their systems this year? Don't know if it'll be as much of a priority because of the better protected Jags.
I personally would want protection of some from of the analog and solenoid breakouts, wether it be the cRIO mounted sideways in the bot and covered with lexan or put in a lexan box... either way, those guys are a great target for another 'bot to come along and slice it in two. Every year our robot's electronics have been completely covered in lexan/polycarbonate with no overheating issues of any kind. I really reccomend that many teams do this, as I saw countless robots being disabled for a match after having their electronics penetrated by another robot, usually with fatal results.

Thanks for the great comments guys! Look out for us in FLR, GTR and the Championships!

Nick
__________________
Reply With Quote
  #7   Spotlight this post!  
Unread 31-12-2008, 11:37
-e- -e- is offline
Registered User
AKA: Courtney
FRC #0836 (The RoboBees)
Team Role: Leadership
 
Join Date: Dec 2008
Rookie Year: 2006
Location: Maryland
Posts: 1
-e- is an unknown quantity at this point
Re: pic: 1503's Off-Season Project

yeah but don't forget to allow air to flow through or you will over heat your board and once ya do that you are finished...

oh and labeling wires is a huge help!
Reply With Quote
  #8   Spotlight this post!  
Unread 31-12-2008, 11:48
Racer26 Racer26 is offline
Registered User
no team
Team Role: Alumni
 
Join Date: Apr 2003
Rookie Year: 2003
Location: Beaverton, ON
Posts: 2,229
Racer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond reputeRacer26 has a reputation beyond repute
Re: pic: 1503's Off-Season Project

Quote:
Originally Posted by computerboi1503 View Post
I personally would want protection of some from of the analog and solenoid breakouts, wether it be the cRIO mounted sideways in the bot and covered with lexan or put in a lexan box... either way, those guys are a great target for another 'bot to come along and slice it in two. Every year our robot's electronics have been completely covered in lexan/polycarbonate with no overheating issues of any kind. I really reccomend that many teams do this, as I saw countless robots being disabled for a match after having their electronics penetrated by another robot, usually with fatal results.

Thanks for the great comments guys! Look out for us in FLR, GTR and the Championships!

Nick

Lexan armor is great if you can afford the weight. Historically 1075 hasn't built a bot that had room in the weight budget for it... we've only had 1 major mishap where a radio connector got ripped off the RC in 2007, and a couple minor ones where a pwm got pulled in 5 seasons of on-and-off season events.
Reply With Quote
  #9   Spotlight this post!  
Unread 31-12-2008, 14:27
computerboi1503 computerboi1503 is offline
Programmer/Driver/Spokesperson
AKA: A former me.
FRC #1503 (Spartonics)
 
Join Date: Jan 2008
Rookie Year: 2006
Location: Niagara Falls, Ontario, Canada
Posts: 29
computerboi1503 will become famous soon enoughcomputerboi1503 will become famous soon enough
Re: pic: 1503's Off-Season Project

Lexan armour is fantastic, and I can attest to that.

During Ra Cha Ruckus on '07, I operated the arm on our robot, for anyone who is familiar with our Rack n Roll robot. Anyways, we forgot to put one of the lexan shields on that covers our main power breaker.... and I managed to drive the claw straight into it, shutting our robot off for the match... but our PDB was dead at the start, so we had virtually no base control during the match, so I guess there was not much of a change in results.
__________________
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Off Season project Woody1458 General Forum 0 25-02-2008 14:23
pic: Off season project joeweber Extra Discussion 19 31-12-2007 22:50
Off-season project ideas? danshaffer General Forum 27 09-04-2007 21:54
Help design off-season project efoote868 Chit-Chat 4 09-04-2007 09:19
Off-Season Competition Project Katie Reynolds Off-Season Events 29 28-04-2005 00:01


All times are GMT -5. The time now is 08:02.

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