View Single Post
  #3   Spotlight this post!  
Unread 05-02-2012, 15:40
artdutra04's Avatar
artdutra04 artdutra04 is offline
VEX Robotics Engineer
AKA: Arthur Dutra IV; NERD #18
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: Mar 2005
Rookie Year: 2002
Location: Greenville, TX
Posts: 3,078
artdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond repute
Re: Gear ratios for launcher

Quote:
Originally Posted by swwrobotics View Post
Our mentor said the we should have as little amount of contact with the ball as possible to pervent too much deformation and loss of accuracy. So you're right, that definitely could be the problem. But just out of curiosity, would it be worth more to have a high gear ratio or a larger wheel diameter?
From what it sounds like, your shooter barely compresses the ball. If so, the best thing to try out first would be to increase the compression between the shooter wheel and the ball; otherwise every motor and wheel combination you can try will likely have the same disappointing results.

The trick is to find a balance between not enough compression (not enough energy from the wheel gets transferred to the ball, leading to wimpy shooting range) and too much compression (too much energy is taken from the shooter wheel without any shooter range improvements). If you do some experimenting, you'll find an a good balance between the two.

Once you find the ideal level of compression, then you can look into substituting other motors, gear ratios, and wheel sizes.
__________________
Art Dutra IV
Robotics Engineer, VEX Robotics, Inc., a subsidiary of Innovation First International (IFI)
Robowranglers Team 148 | GUS Robotics Team 228 (Alumni) | Rho Beta Epsilon (Alumni) | @arthurdutra

世上无难事,只怕有心人.