pic: DeWalt drive base: side module

[newton418]

Originally Posted by AdamHeard

Use JVN's design calculator to choose your ratios, and model the results;


http://www.chiefdelphi.com/media/papers/1469


Don't forget that under robot weight, don't just put 120. Add in the weight of the battery and bumpers as well if you plan on using them.


This calculator removes all guesswork, speculation and "well, it worked for us....". It will give you the precise performance data along with helpful graphs.

Gear inefficiencies, weight distribution, and coefficient of friction all must be estimated. For this reason, though the calculator is very nice and convenient, testing is still necessary to ensure you get the results you want.
Also, while the calculator is convenient, I would highly recommend that everyone create their own spreadsheet and run the calculations themselves. That way, if you don't get the results you want, you will have a better understanding of what you can change.