15-12-2015, 11:06
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no bag, vex only, final destination
AKA: Pinecone
 FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks) Team Role: Mentor
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Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,604
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Re: FRC pre made 2-speed gearboxes
It's never what's best, it's what's best for your team / design.
That said, it's hard to beat the weight and quality of Vex's gears, so the choice basically comes down to ball shifter or WCP dog shifter. The dog shifter accomplishes a good reduction for a west coast drive in just two stages of gearing, and is best suited for direct drive output with chains to outer wheels. The ball shifters can both work with WCDs but all require 3 stages of gearing to direct drive a wheel. If you are doing a final chain / belt reduction between the gearbox and wheel, the ball shifter is the best choice. Finally, the ball shifter shifts more smoothly / easily than a dog shifter, but this is just a minor benefit in a drivetrain as both work well enough to be competitive.
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Mentor / Drive Coach: 228 (2016-?)
...2016 Waterbury SFs (with 3314, 3719), RIDE #2 Seed / Winners (with 1058, 6153), Carver QFs (with 503, 359, 4607)
Mentor / Consultant Person: 2170 (2017-?)
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College Mentor: 2791 (2010-2015)
...2015 TVR Motorola Quality, FLR GM Industrial Design
...2014 FLR Motorola Quality / SFs (with 341, 4930)
...2013 BAE Motorola Quality, WPI Regional #1 Seed / Delphi Excellence in Engineering / Finalists (with 20, 3182)
...2012 BAE Imagery / Finalists (with 1519, 885), CT Xerox Creativity / SFs (with 2168, 118)
Student: 1714 (2009) - 2009 Minnesota 10,000 Lakes Regional Winners (with 2826, 2470)
2791 Build Season Photo Gallery - Look here for mechanism photos My Robotics Blog (Updated April 11 2014)
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