Thread: 2 cim vs 1 cim
View Single Post
  #1   Spotlight this post!  
Unread 20-01-2017, 13:55
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 cim vs 1 cim

Quote:
Originally Posted by efoote868 View Post
In a drivetrain, a 775pro WILL overheat.
Stall them for more than 3 seconds, and they're no longer motors. Run them for more than 90 seconds at peak power, and they're no longer motors.

See actual test results here: http://motors.vex.com/775pro
I am not so sure about the statement above that I have put in bold.

The facts you refenced are sound but it doesn't follow that 775Pros are the wrong answer.

I believe a lot of top level teams will have great success this year using the 775Pros in their drivetrain. This year weight is probably not the huge driver that it is in many years so I don't suppose it will be as common as it would have been if teams were fighting for every gram.

Even so, I would not make blanket statements predicting failure when I don't think the data necessarily support this conclusion.

FWIW, you will have much less margin for error when it comes to overheating your drive motors but that does not mean that good teams with sound engineering can't find a way to make it work.

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