Thread: FP ok to stall?
View Single Post
  #6   Spotlight this post!  
Unread 08-03-2010, 15:45
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: FP ok to stall?
The FP have a thermally activated switch that protects them from getting too hot but it also prevents you from pushing them to the limits of their capability.

I thought it was fine to have intermittent use at 1/2 stall torque, but I have heard war stories that make me believe otherwise. I am planning on having a modification that will allow me to drop my motor current to 1/4 to 1/3 of the stall value during lift.

As I said, I think I should be okay for 4 seconds at 1/2 stall but I don't dare bet the farm on it...

So... ...we make contingency plans and hope we don't need them...


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