View Single Post
  #9   Spotlight this post!  
Unread 28-10-2014, 15:25
Oblarg Oblarg is offline
Registered User
AKA: Eli Barnett
FRC #0449 (The Blair Robot Project)
Team Role: Mentor
 
Join Date: Mar 2009
Rookie Year: 2008
Location: Philadelphia, PA
Posts: 1,111
Oblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond reputeOblarg has a reputation beyond repute
Re: 2 Speed Gearboxes FPS?

Quote:
Originally Posted by Ronnie314 View Post
I'm still confused on why you need to be that low to push? I guess if you want to push 3 robots in a row but at that point I would see it as more of a waste of time from an offensive point of view...and I would never encourage a team to go straight defense anyways so I would want to cater my drive more towards my offensive production rather than its primary defensive capabilities. Of course I would want it to be able to play D but that is a thought after I fulfill my offense requests.
If you want to push continuously with a 150lb robot with a high wheel COF (say somewhere around 1.3-1.5) without any danger of tripping the breaker, 5.5 is very reasonable. I saw a lot of ~5/15 splits for 6CIM drives at worlds. It is always nice to give yourself a bit of headroom. It's not so much of a sacrifice to lose a bit of speed on your pushing gear when you have a shifter and won't be moving any serious distances in that gear, anyway.

Of course, with a lighter robot or one with less grippy wheels or one that doesn't draw much power other than the drive, one can (and should) gear more aggressively.

For reference, our preseason drive (which, we hope, will also be our competition drive this year) is going to be geared for around 6/16 with roughtop wheels.
__________________
"Mmmmm, chain grease and aluminum shavings..."
"The breakfast of champions!"

Member, FRC Team 449: 2007-2010
Drive Mechanics Lead, FRC Team 449: 2009-2010
Alumnus/Technical Mentor, FRC Team 449: 2010-Present
Lead Technical Mentor, FRC Team 4464: 2012-2015
Technical Mentor, FRC Team 5830: 2015-2016

Last edited by Oblarg : 28-10-2014 at 15:29.
Reply With Quote