View Single Post
  #4   Spotlight this post!  
Unread 10-11-2016, 12:09
Ginger Power's Avatar
Ginger Power Ginger Power is offline
The GreenHorns Team Lead
AKA: Ryan Swanson
FRC #4607 (C.I.S.)
Team Role: Mentor
 
Join Date: Jan 2014
Rookie Year: 2012
Location: Becker, Minnesota
Posts: 834
Ginger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond reputeGinger Power has a reputation beyond repute
Re: 4607 Butterslide Drivetrain V2

Quote:
Originally Posted by Ari423 View Post
A quick calculation with the JVN calc says that even with a conservative estimate of the CoF (I can't imagine it's below .6) I get 70A per motor in omni mode. According to the snap action breaker spec sheet, it should hold for somewhere between 2.2 and 9.2 seconds before cutting off. Unless I'm missing something, you might want to take another look at that.
I believe this calculation is for when the motors are stalled. With a butterfly drive, there's no reason to get into a pushing match in omni mode. Any pushing would be handled with traction wheels which will take much longer to pop a breaker. With that said, I know 16.5 fps with a single reduction and 4 cim drive is pretty fast, but is it really too fast?
__________________
Bison Robotics President
35 new FRC volunteers from Bison Robotics
The GreenHorns 2015/2016 Project Lead: Reveal Paper
Reply With Quote