Go to Post Not gonna lie, I wanna marry the person over at #254 who does their wiring... I have admired it for years. :) - Lightfoot26 [more]
Home
Go Back   Chief Delphi > FIRST > Robot Showcase
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #16   Spotlight this post!  
Unread 01-03-2006, 02:19
Unsung FIRST Hero
miketwalker miketwalker is offline
Robot Lifeguard
FRC #1902 (Exploding Bacon)
 
Join Date: Dec 2001
Rookie Year: 2002
Location: Orlando, FL
Posts: 878
miketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond reputemiketwalker has a reputation beyond repute
Send a message via AIM to miketwalker
Re: pic: How 1251 shipped.

Quote:
Originally Posted by sanddrag
The brand of your transmission has absolutely nothing to do with the number of times you can shift it before your air runs out. Anyhow, what pressure are you shifting at? Last year, we shifted at about 45 PSI and got 12 shifts out of one tank. How can you get well over 100? You must have been shifting at a low pressure. We started at about 100 psi in the tank, took 12 shifts, and ended under just 45. But anyway, 12 shifts is shifting once every 10 seconds. So, if shifting is your only pneumatics, you can probably get by with one tank.
I mentioned the transmission because we used the AndyMarks which means you just need to use the 1/2" cylinders. If they did custom ones they might need larger which wouldn't work as well. If you check for air leaks and pump the PSI to the amount allowed it should last for a good number of shifts.
__________________
Chopsaw? Chopsaw.
  #17   Spotlight this post!  
Unread 01-03-2006, 12:53
Stephen P's Avatar
Stephen P Stephen P is offline
Registered User
#1093
Team Role: Mechanical
 
Join Date: Jan 2003
Rookie Year: 2003
Location: Richmond VA
Posts: 113
Stephen P has a spectacular aura aboutStephen P has a spectacular aura about
Re: pic: How 1251 shipped.

There is alot of aluminium support structure you can take out of there and still retain structural integrity. We dropped about 20 lbs just losing extra aluminium bars. Just think minimalisticaly.
__________________
You know you are an electrical engineer when you can determine voltage relative to pain with a 5% error.
  #18   Spotlight this post!  
Unread 01-03-2006, 13:29
Cory's Avatar
Cory Cory is offline
Registered User
AKA: Cory McBride
FRC #0254 (The Cheesy Poofs)
Team Role: Engineer
 
Join Date: May 2002
Rookie Year: 2001
Location: Redwood City, CA
Posts: 6,812
Cory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond reputeCory has a reputation beyond repute
Send a message via AIM to Cory
Re: pic: How 1251 shipped.

I'd second what everyone else is saying. If you're only using pneumatics to shift the trannies, ditch the compressor, and precharge one accumulator before the match. We're getting ~50 shifts off of one accumulator, regulated down to 20 PSI.

Someone suggested taking off the AndyMarks in favor of the kit gearbox. I don't know how much one of their current transmissions weighs, but I'm pretty sure an AndyMark is less than a KOP gearbox.
__________________
2001-2004: Team 100
2006-Present: Team 254
  #19   Spotlight this post!  
Unread 01-03-2006, 14:05
techtiger1's Avatar
techtiger1 techtiger1 is offline
Coach Drew?!?!
AKA: Drew Disbury
FRC #1251 (TechTigers)
Team Role: Mentor
 
Join Date: Jul 2004
Rookie Year: 2004
Location: coconut creek ,fl
Posts: 629
techtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond reputetechtiger1 has a reputation beyond repute
Send a message via AIM to techtiger1
Re: pic: How 1251 shipped.

The transmissions use a 1in stroke piston, which is larger then the Andy marks use .75in inch stroke I believe. The wheels for Sanddrag's information are uhmw and were very cheap to make thanks to our machining facilities, they were done with a CNC mill and we just bought the stock which ran under $200.

-Drew
__________________
Team 1251 The TechTigers
"Inspiring future innovators, one stripe at a time"
2004 Rookie All Star Orlando Regional
2006 Palmetto Regional Winner
2007 Orlando Regional Winner
2008 Orlando Regional Winner
2010 Orlando Regional Winner
2013 South Florida Regional Winner
  #20   Spotlight this post!  
Unread 01-03-2006, 14:57
KenWittlief KenWittlief is offline
.
no team
Team Role: Engineer
 
Join Date: Mar 2003
Location: Rochester, NY
Posts: 4,213
KenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond reputeKenWittlief has a reputation beyond repute
Re: pic: How 1251 shipped.

Quote:
Originally Posted by Cory
We're getting ~50 shifts off of one accumulator, regulated down to 20 PSI....
Might want to check the specs on the pneumatic valves - I think they are rated for a minimum pressure of 30psi? Maybe it was only the big valve but its something to look into.

If the valve only switches half way all the air in your tank will leak out.
  #21   Spotlight this post!  
Unread 01-03-2006, 14:59
Jay W.'s Avatar
Jay W. Jay W. is offline
College, firefighter, robot builder
AKA: Jayba!
FRC #0845 (Cutting Edge)
Team Role: College Student
 
Join Date: Feb 2003
Location: Pendleton, SC
Posts: 93
Jay W. has a spectacular aura aboutJay W. has a spectacular aura about
Send a message via AIM to Jay W.
Re: pic: How 1251 shipped.

What what I can see, you've got the an excellent design, you just need to get it together/skinnier!

When we get to Florida, just look for us and we'll be glad to help. Heck, we'll have plenty of people un-crating our machine, I'll come help ya'll out (maybe if theres a T-shirt involved j/k :-P).

my e-mail is jayw(AT)famview.com, if you think of anything, just shoot me a message.

cya at UCF,
~Jay

EDIT:

Just thought of something, could you ditch the compressor and just refill an air tank(s) in between matches?
__________________
Jay Wright
Cutting Edge #845
College Student/Mentor/do whatever guy



  #22   Spotlight this post!  
Unread 01-03-2006, 15:30
Andrew Rudolph's Avatar
Andrew Rudolph Andrew Rudolph is offline
Git 'em!
no team (Robot in 3 Days)
Team Role: Mentor
 
Join Date: May 2001
Rookie Year: 2000
Location: Orlando, FL
Posts: 921
Andrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond reputeAndrew Rudolph has a reputation beyond repute
Send a message via AIM to Andrew Rudolph
Re: pic: How 1251 shipped.

Maybe you guys could rebuild that structure using 1/16 wall aluminum, it looks thick in the picture.

You guys are a great team and I am sure you will be really competitive shooter or not.
__________________
iR3 Creative Engineering
Robot in 3 Days

FTC 6323 The Pink TeamMentor
FTC 8996 Pink Fluffy BunniesMentor
FRC 233 The Pink Team Mentor
FRC 1902 Exploding Bacon Mentor
  #23   Spotlight this post!  
Unread 01-03-2006, 15:59
Chriszuma's Avatar
Chriszuma Chriszuma is offline
Jack of all trades
AKA: Chris Hammond
FRC #0068 (Truck Town Thunder)
Team Role: Alumni
 
Join Date: Oct 2004
Rookie Year: 2005
Location: Clarkston, MI
Posts: 290
Chriszuma is just really niceChriszuma is just really niceChriszuma is just really niceChriszuma is just really nice
Send a message via AIM to Chriszuma
Re: pic: How 1251 shipped.

Here's some ideas for you:
- Replace the big CIMs with smalls ones - there's a few pounds right there (they have more torque too)
- Ditch the compressor and just pre-fill- thats about 6 pounds
- The big A-frame you've got going looks kind of unnecessary. You could probably make it much smaller.
- It looks like you have way more metal than you need on the hopper.
- Those are some incredibly massive transmission plates and mounts. Drill big holes in them.
- You can use much smaller chains. Ours are about half that size, and we've never had problems with breakage.
- You might have to ditch that machined nameplate on the front. It looks like it weighs about 10 pounds; at least use thinner material.
- It looks like all your square bar is 1/8" walled, and you can definitely get away with 1/16". It's probably a bit late to change that though.
- If you can, machine down the gears in the gearbox. By taking down the hub and putting a few holes in them, you can cut them down from about a pound each to about a third of a pound.
- Fill the air system with helium!!

- Edit: you can run the shooter with only one motor, with a chain to each wheel. We are running ours (same horizontal setup) with a single FP motor on a custom gearbox.
__________________
2006 T3 World Tour: Great Lakes - Waterloo - Palmetto - IRI
2006 Awards: Motorola Quality - RadioShack Innovation in Control

My website: http://zuma.phire.org/
Truck Town Thunder's website: http://trucktownthunder.com/

Last edited by Chriszuma : 01-03-2006 at 16:04.
  #24   Spotlight this post!  
Unread 01-03-2006, 18:32
jcatt's Avatar
jcatt jcatt is offline
Registered User
AKA: Jonathan Catt
FRC #1902 (Exploading Bacon and FRC #1251 TechTigers)
Team Role: Alumni
 
Join Date: Jan 2005
Rookie Year: 2004
Location: Alpharetta, GA
Posts: 44
jcatt is a glorious beacon of lightjcatt is a glorious beacon of lightjcatt is a glorious beacon of lightjcatt is a glorious beacon of lightjcatt is a glorious beacon of lightjcatt is a glorious beacon of light
Re: pic: How 1251 shipped.

Thanks to everyone who has given us advice so far.

As of right now we are a few pounds under!!(Sigh of relief)

As for the competition we plan to modify our hopper to hold A LOT more balls and we will be keeping the large bike motor in the gearbox so we can remain to be a strong defensive robot.

Thanks again for all the support.

The TechTigers
__________________
Jonathan Catt
Co-Owner and Systems Architect of ColorScene Inc.

Co-Sponsor of The RoboShow: Orlando
FRC 1251 Alumni
FRC 1902 Mentor
  #25   Spotlight this post!  
Unread 01-03-2006, 21:20
Dillon Compton Dillon Compton is offline
Jack-Of-All-Trades
FRC #1391 (Metal Moose)
Team Role: Mentor
 
Join Date: Jan 2005
Rookie Year: 2004
Location: Malvern, PA
Posts: 186
Dillon Compton has much to be proud ofDillon Compton has much to be proud ofDillon Compton has much to be proud ofDillon Compton has much to be proud ofDillon Compton has much to be proud ofDillon Compton has much to be proud ofDillon Compton has much to be proud ofDillon Compton has much to be proud of
Send a message via AIM to Dillon Compton
Re: pic: How 1251 shipped.

Hey- Dont worrry, you arent the only team in this situation (we shipped with a robot that would be expected in the middle of week 5, at best...). An excellent way we found to cut weight was to replace our heavier box and extruded aluminum with (i think it was 1/8" wall) inch box aluminum with a 3/8" speedhole ~ every 3/4"(on all 4 faces). We used our drillpress, took an hour to do all the pieces we needed; just look at where you will need to attach and dont speedhole there, because you will need to throughbolt. This brought the weight down to about .1lbs/foot for material that wont be taking a beating (hopper frame, stuff inside your 'bot profile, etc...)- heck, it's even pretty strong- I am about 240-250lbs, and I held a 3 ft length of speedholed box at an angle on the ground and stood on it, so it was supporting all my weight and being levered against my foot, and it took me about 5 mins of continuous pressure to get a relatively slight bend.

Good luck, and remember, if nothing else, defense is always useful!
__________________
www.metalmoose.com
  #26   Spotlight this post!  
Unread 02-03-2006, 17:57
David Guzman's Avatar
David Guzman David Guzman is offline
Registered User
AKA: Dave
FRC #1251 (The Techtigers)
Team Role: Engineer
 
Join Date: Nov 2004
Rookie Year: 2004
Location: Broward, FL
Posts: 522
David Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant futureDavid Guzman has a brilliant future
Re: pic: How 1251 shipped.

Thanks everyone for the support. Just to answer some questions and suggestions.

-The wheels are made out of UHMW and the came out to be about $12.00 each and about 1.5 hours of CNCing each one. Also each one weight just under half pound so taking the middle one out wouldn't make a big difference.

-The shooter can not come back on because of the way it was taken off, when we started "the diet" many welds were cutted and makes it impossible for some pieces to come back on.

-As shown in the picture (plus electronics, and storage tanks) the robot weights 109 lbs so we don't have the need to remove pneumatics. Also we will be using the air for a dump truck design.

-We are planing on putting a dump truck in the back of the robot at UCF and we think of cutting up the current hopper to suit our needs.

-Also the paint job looked great before the diet.


Thanks everyone for the support and we have tons of work for Thursday.

No matter what happens to the robot we learned our lesson and we had fun. That's what matters, we still think we can make this a very competitive robot but we were expecting to have a killer machine as you can see on the other pictures. Sometimes we have to go through rough things to become wiser and well as much as i don't like to cut our bot to pieces it was needed to learn our lesson. We are also proud of this robot because it was all student designed, student machined and student built.

Good Luck to every one.

Dave
__________________
Team 1251 The Techtigers
2010 FL Regional Winner (BIG thanks to 86 and 1612)
2009 FL Regional Finalist (BIG thanks to 79 and 744)
2008 FL Regional Winner, FL GM Industrial Design, SC GM Industrial Design
2007 FL Regional Winner, FL GM Industrial Design, Palmetto Regional Finalist, Palmetto Motorola Quality.
2006 Palmetto Regional Winner, Daimler Chrysler Team Spirit Award
2005 FL Regional Judges Award, FL Regional 3rd seeded and finalist, Palmetto Regional Xerox Creativity Award, Palmetto Regional 1st seeded and finalist
2004 UCF Regional Rookie All-star Award
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Can the pic controller send the data to pc? sunnyrx7turbo Control System 2 05-08-2005 13:14
Programming a 2nd PIC ImmortalAres Programming 8 16-06-2005 12:13
Scouting 1251 style sebas2mil Scouting 8 26-03-2005 21:06
pic: 2 Robots shipped.... CD47-Bot Robot Showcase 13 04-03-2003 02:43


All times are GMT -5. The time now is 19:17.

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