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Unread 30-01-2013, 23:20
Joe G.'s Avatar
Joe G. Joe G. is offline
Taking a few years (mostly) off
AKA: Josepher
no team (Formerly 1687, 5400)
Team Role: Mentor
 
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Re: pic: Team 1687 Doherty Technical Forces - Chassis

To answer some questions:

-We have complete confidence in the turning and stability of this drivetrain. In addition to past success by team 179 and others with this style of drive, we've done the math -- it will turn with comparable scrub to a 38*28 6WD. The system is just structured somewhat differently than 179's, taking liberal inspiration from the West Coast Drive, the sheet metal work of teams 148, 228, 488 and others, and 2791's "belt in tube" system.

-Why bother? Some reasons we considered:
  • Tucks us further back in the 54" cylinder, giving us much needed room in the front for our multi function drop down system
  • (slightly) reduces perimeter for a given rectangular footprint, giving us a bit more space within the robot. The impact is slight, but it's enough to make all our desired functionality fit comfortably.
  • During strategy analysis, we foresaw frequent head-on collisions due to cross-field traffic, and situations where a defender may attempt to blockade access of some part of the field. The beveled edges allow our robot to glance off and pass by other robots more effectively (I believe this was also the intent behind 179's design)

-Here's a sketch showing our robot's bumper perimeter. The two front segments are each the minimum length. Framing which supports the bumpers on this odd-shaped perimeter not shown, much of the real load-bearing hardware does come off with the bumpers, but there is enough support on the robot to legally support the bumpers, and create a well-defined frame perimeter for inspection.

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FIRST is not about doing what you can with what you know. It is about doing what you thought impossible, with what you were inspired to become.

2007-2010: Student, FRC 1687, Highlander Robotics
2012-2014: Technical Mentor, FRC 1687, Highlander Robotics
2015-2016: Lead Mentor, FRC 5400, Team WARP
2016-???: Volunteer and freelance mentor-for-hire

Last edited by Joe G. : 30-01-2013 at 23:43.
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