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Unread 27-12-2006, 18:46
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Greg Needel Greg Needel is offline
REVving up for a new season
FRC #2848 (All-sparks)
Team Role: Engineer
 
Join Date: Jan 2002
Rookie Year: 2002
Location: Dallas, TX
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Re: pic: 2 Speed Transmission

Quote:
Originally Posted by Lil' Lavery View Post
15 fps is probably too fast for FIRST purposes. Most teams and drivers agree you lose the ability to easily control your robot after about 11-12 fps. Additionally, you can easily outrun most other teams at around the same speed.
If you wanted to keep the 3:1 ratio, I'd aim 12 fps and 4 fps (with inefficiencies slowing it slightly from those values).
I agree that most drivers think that 12 fps is a top speed, but in my opinion that top speed in the gearbox is almost irrelevant. As long as you have enough torque to move your robot at that speed, then you can always drive slower. Just because most drivers push the sticks all the way forward when they drive doesn't mean it is required. It is also possible to reduce the speed in software if you really wanted to.

As for outrunning most other teams...if most teams shoot for 12 fps you won't

The general rule of drive trains is you can always go slower, and you can always have use less torque; it is when you try to do things the other way that you run into problems.
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Greg Needel│www.robogreg.com
Co-founder REV Robotics LLC www.REVrobotics.com
2014 FRC World Champions with 254, 469, & 74
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