View Single Post
  #40   Spotlight this post!  
Unread 09-04-2010, 15:49
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,798
Al Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond repute
Re: Does motor temp affect performance?

Hey Craig,
All six wheels on the ground? You have trouble turning quickly?

High friction wheels on carpet in turns causes high (and I mean very high) currents in CIM motors. Assume that the CIMs are going into stall every time you turn. I bet it would not be unusual for the CIMs to be running at 100 amps in turns, each. 100 amps means about 1200 watts per motor, all things being equal. Yes that is like four 1000 watt light bulbs in your robot making heat. The fix is changing the height of the center wheel, change some of the wheels to omnis or a combination of the two.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.