Quote:
Originally Posted by bs7280
Ok, say a team decides to go with a drive base (nothing specific for the sake of helping other teams who view this) for each base, how does one select the "best" gear ratio to be chosen on a bot? Looking at different gearboxes for different drive base types, there are alot of choices and it is quite intimidating to choose considering how expensive they are.
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We use a two speed and mostly because:
We can set a gear used for acceleration and pushing matches to be traction limited (Torque created at ~40 amps times wheel radius > force of static friction of wheels on carpet)
We can set a gear to get us where we want to go as fast as possible. (balance of acceleration from top speed of gear 1 with top speed)
If you choose a single speed, a balance of top speed and pushing force is ideal. Usually teams set there bot to be right on the edge of traction limited. This is not inherently ideal, but is simple and can give a successful result.
JVN design calc as suggested above is the way to go.