View Single Post
  #39   Spotlight this post!  
Unread 15-12-2012, 22:36
DampRobot's Avatar
DampRobot DampRobot is offline
Physics Major
AKA: Roger Romani
FRC #0100 (The Wildhats) and FRC#971 (Spartan Robotics)
Team Role: College Student
 
Join Date: Jan 2012
Rookie Year: 2010
Location: Stanford University
Posts: 1,277
DampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond repute
Re: Why not to shift?

For a team with 6 drive motors (for example, let's say a 775 and two CIMs), how fast would the robot be traction limited at? I would assume if a 2 CIM drive is traction limited at 6fps, then with a 775, the traction limited single speed gearing allow for a top speed around 8fps. Could you, theoretically, just throw power onto the drive until you were traction limited at, say 13fps?

On a related thread, how many motors can you give a drivetrain while still drawing less current than the main breaker will pop at? An unsophisticated analysis says that even 4 CIMs drawing 40 amps (ie, accelerating from a stop) will pop the 120 amp main breaker. Is the limit on the number of motors which can reasonably be put in the drive dictated by the main breaker?
__________________
The mind is not a vessel to be filled, but a fire to be lighted.

-Plutarch