06-02-2013, 16:51
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Passionate FIRST-er, CD donor
AKA: Gerry
 FRC #0578 (Red Raider Robotics) Team Role: Mentor
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Join Date: Jan 2012
Rookie Year: 2008
Location: Rochester, NY
Posts: 256
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Re: Battery life
What is your total reduction, and what size wheels are you using? If the ratio is low (and the bigger the wheels, the more reduction you need), that means the motors will be running close to stall all the time, which means they draw a high current. The robot will also have low acceleration and low pushing power.
Also, have you checked how much friction is in the system? If you disconnect the wheels (I haven't seen your design, so I don't know if you can do this), they should spin freely. The gearbox should be able to turn without much noise (scraping or binding).
If you post a picture, and details on your gearbox (and pulleys or sprockets, if any), we may be able to help more.
Good luck!
__________________
Cal
R3: Red Raider Robotics (FRC Team 578)
Fairport, NY, USA
www.FairportRobotics.org
2016 Finger Lakes Regional: Semifinalist on Alliance 7 (1128, 2010, 578)
2016 NYC Regional: Finalist on Alliance 3 (3419, 578, 3017), 4th seed team, Team Spirit Award
2015 Finger Lakes Regional: 8-3-0 in qualification, 7th seed, Quarterfinalist
2014 NY Tech Valley Regional: 8-4-0 in qualification, 13th seed, Semifinalist
2013 Finger Lakes Regional: 4-5-0 in qualification, 26th seed, Alliance 6, 1-2 in tournament
2012 Buckeye Regional: Gracious Professionalism Award, 7-3-0, 14th seed
2011 Finger Lakes Regional: Engineering Inspiration Award
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