Quote:
Originally Posted by Joe Johnson
/Snip/
Here are the threads I plan on starting:
[list][*]Robot Building[list][*]Chassis - Bumpers 101<<what is the DEAL?!
- Tires Choices <<I love grippy tires. what are the best today
- Shifting vs. more motors vs. some other magic
- To Swerve and Protect: how important is going sideways? Omniwheels vs. Mechanum vs. Steerable Drive?
Joe J.
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Mr. Johnson, it will be a pleasure to have you in the Forums. I remember back went I was in 9-10th grade at the state championship one of my mentors pointed you out to me. "Do you know who that is? That's one of the greatest minds in FIRST. That's the guy who use to run team 47 back when 47 was the Beatty of first. He's the person who started using drill transmissions in FRC."
Anyways, back to now, I can assist in some of these areas.
Bumpers:
-This is a pretty new way which works well
http://www.chiefdelphi.com/forums/sh...hlight=Bumpers
-Andymark sells bumper supplies
http://www.andymark.com/category-s/253.htm
However, I do not suggest buying the bumper skirts as they are rather saggy and generally don't look very nice.
-Many teams make two seperate sets of interchangable bumpers (red and blue)
As to tires:
-No metal on floor contact because the floors were getting ripped up
-Now a days Andymark wheels are quite popular:
http://www.andymark.com/category-s/229.htm
6" wheels using roughtop tread have a CoF of about 1.2 after wear. Many teams use these to great effect.
-Pneumatic tires: mcmaster 2717T51 are probably the best but do require pressure maintaince. :
http://www.chiefdelphi.com/forums/sh...neumatic+Tires
Shifting:
-Shifting tyranies are no longer popular because the amount of power teams have axcess to negligates their effectiveness.
-However, many teams use two speeds: the most popular is the Andymark Supershifter:
http://www.andymark.com/product-p/am-0114.htm
Drivetrains:
-6wd with a dropped center wheel is extreamly popular.
-After 2010 many teams have begun using 8wds (inner wheels dropped)
-Many teams weld aluminum box tubing, or use custom sheet metal drivetrains. This is a decent thread about frames:
http://www.chiefdelphi.com/forums/sh...hlight=Bumpers
-"west coast" drives are becoming popular:
http://www.chiefdelphi.com/forums/sh...st+coast+drive
-Lots of people use mecanum wheels for sideways motion: However,
http://www.chiefdelphi.com/forums/sh...ving+c ircles
-Swerves are still swervy.
-A new trend is having articulating wheels to change your wheel type/stance inspired by team 217/148 in 2010:
http://www.chiefdelphi.com/forums/sh...ight=nonadrive
You can also buy drivetrains now:
http://team221.com/order.php
Finally, despite all this fancy-shmancy stuff the kitbot can still be used to great effect:
http://www.simbotics.org/media/video...itbot-steroids
One more good thread-Things never to do:
http://www.chiefdelphi.com/forums/sh...hlight=Bumpers
Welcome back and good luck with your new team!
,Bryan