View Single Post
  #96   Spotlight this post!  
Unread 15-12-2015, 13:58
Andrew Schreiber Andrew Schreiber is offline
Data Nerd
FRC #0079
 
Join Date: Jan 2005
Rookie Year: 2000
Location: Misplaced Michigander
Posts: 4,057
Andrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond repute
Re: SD540 Motor Controller

Quote:
Originally Posted by Chris is me View Post
Will a firmware upgrade be released to remove the "safety feature" that cuts motor output if the input voltage drops below 9.5 volts? The "feature" is a deal breaker for me, as that is a surprisingly easy condition to reach on an FRC robot.

Also, the spec sheet claims the speed controller operates at voltages as low as 6 volts, but this "safety feature" kicks in long before that, so the spec sheet is wrong.
And claiming it's a safety feature makes little sense to me. I can run Victors off a 2S Lipo (7.2-8.4V) and be fine. No safety issue, just the robot only operates at those voltages (say for smaller than FRC robots) but this "feature" makes SD540's worthless in these applications. Despite them appearing to be a better fit because of lower cost. (Performance isn't as critical in this application, cost is more a factor)
__________________




.
Reply With Quote