View Single Post
  #11   Spotlight this post!  
Unread 03-01-2011, 20:28
kamocat's Avatar
kamocat kamocat is offline
Test Engineer
AKA: Marshal Horn
FRC #3213 (Thunder Tech)
Team Role: Mentor
 
Join Date: May 2008
Rookie Year: 2008
Location: Tacoma
Posts: 894
kamocat is just really nicekamocat is just really nicekamocat is just really nicekamocat is just really nicekamocat is just really nice
Send a message via AIM to kamocat Send a message via MSN to kamocat
Re: Modeling motor control

Quote:
Originally Posted by Hawiian Cadder View Post
i think that the current has that weird curve is because there is not enough load for it to run at near no load, but there is not enough load for it to run consistently at multiple speeds, try adding some load to the motor and see if that does anything.
How should I create additional load in a repeatable way?

What would this tell me?

EDIT:
Are you saying the motor speed isn't repeatable?
Based on the first graph, we saw that the speed is directly proportional to current, with fairly tight control. It's only the current that is doing funny things.
I can tell you that at full voltage, it's operating pretty close to no load, under peak efficiency. Below that speed, I have no data. That's why I'm doing this test.
__________________
-- Marshal Horn

Last edited by kamocat : 03-01-2011 at 20:41.