View Single Post
  #11   Spotlight this post!  
Unread 23-01-2007, 08:37
Joe Johnson's Avatar Unsung FIRST Hero
Joe Johnson Joe Johnson is offline
Engineer at Medrobotics
AKA: Dr. Joe
FRC #0088 (TJ2)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 1996
Location: Raynham, MA
Posts: 2,648
Joe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond repute
Re: 2 CIMs -- practical?

I used to be in the 1 CIM per side is enough camp. BUT... ...with the growth of motors in the FIRST KOP, the balance of powers has changed and so too my opinion.

2 CIMs per side is not a must have but it is a very big advantage. And not just in order to "win a pushing match" Yes it can help with that but I have come to believe that the #1 reason is it is a benefit is that it gives you 2 40Amp breakers to push to their limits vs. only 1 40Amp breaker. The power out of the motor (especially the CIMs) is more often limited by the current it can draw than the physics of the motor.

This double path for current is a huge help in accelerating and in turning.

I have been out of FIRST too long to know how I would really choose if push came to shove, but I may actually end up in the 3 motors w/o shifting camp.

Again, I have come to this mostly as a result of the plethera of good powerful motors in the kit. With fewer motors to pick from in the KOP, I would likely choose differently.

Joe J.
__________________
Joseph M. Johnson, Ph.D., P.E.
Mentor
Team #88, TJ2