View Single Post
  #5   Spotlight this post!  
Unread 10-01-2012, 22:30
Jeffy's Avatar
Jeffy Jeffy is offline
Retired, for now
AKA: Jeff Gier
FRC #2410 (Metal Mustang Robotics) #159 (Alpine Robotics)
Team Role: College Student
 
Join Date: Mar 2008
Rookie Year: 2008
Location: Fort Collins
Posts: 523
Jeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant futureJeffy has a brilliant future
Re: "Pitching Machine" motors

Quote:
Originally Posted by Mk.32 View Post
Some examples of that would be nice ^^
Well, it was a bit of trick question. Using a sort of flywheel setup, a system could have any amount of energy as long as the flywheel fit in weight and size requirements.

This gets difficult for me to explain without a whiteboard for drawings in front of me, but here is my best shot:

What you really want to find out is if you can get a ball moving fast enough to go the distance.

The speed at which you need can be solved with basic high school physics using motion formulas. Enlist a student or physics teacher at your school if this isn't making sense. This is often taught as "projectile motion" in the classroom.

After you have found the speed you need, gear the shooter to spin at this speed, and off you go.

Other things to consider on a shooter:
-How much you compress the ball
-Weight of flywheel (heavier will keep it from slowing down on shots as much because it will have a higher moment of inertia)
-Gripping material (KoP wheels from this year have not wielded good results for me either)
-Time and distance of contact (remember force times distance)
-Spin

Best of luck!
__________________
Metal Mustang Robotics 2410 (2008-2011)
2008 STL Rookie All-Star
2010 GKC Finalists
2010 OKC Champions
Alpine Robotics 159 (2012-)
2012 CO Finalists

700 miles from home, 2 miles from FRC. Life is good.