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Optimal Gear Ratio Calculator v2
Calculator to help choose motors and gear ratios for mechanisms based on their desired characteristics.
This is a simple calculator I started developing for my team last season. It helps choose motors and gear ratios for almost any kind of mechanism. I posted the first version to CD during the season here, but since then I’ve added a lot of new functionality. I am sharing this v2 with the hope that teams will be able to put it to good use.
The basic idea for this calculator is an add-on to JVN’s Mechanical Design Calculator. In addition to inputting a gear ratio and receiving the mechanism characteristics, you can input any of the characteristics and receive both the required gear ratio and the other characteristics. It also calculates the characteristics for a number of “special” points on the motor curve (max power, max efficiency, 20A, 30A, 40A). All of the equations are derived from JVN’s Mechanical Design Calculator and Ether’s Simple Motor Calculator, and I checked that all of the values match. The calculator also includes basic input validation (to tell you if your motor isn’t strong enough for your input) and metric conversion (for international teams).