View Single Post
  #7   Spotlight this post!  
Unread 26-03-2012, 14:34
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: 10,770
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: Voltage Drop problems

John,
Are we reading you right, the shooter is a direct drive CIM? I would expect that to spike motor current significantly when starting the shooter or when ejecting a ball. Remember that the CIM motor is speced at 133 amps at stall. While these two motor together shouldn't draw the battery down that much, there is a possibility that you have loose connections as described above by phil. A drop in voltage is normal, but on a fully charged battery running only these two motors I would expect it to only draw down to 10 or a little under during the first part of the match.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.