I am coaching a Science Olympiad Team in Michigan and my students are building a robot for the Robo Cross event. They have built a mini tank that is using the Tamiya double gearbox (58:1 gear ratio) running on two batteries (3 volts). The tank moves okay but kind of slow. The question my kids are wondering is the description on the gearbox on the website says the gearbox can run on 3 to 6 volts . . . however the individual motor specs say each motor only takes up to 3 volts.
My kids and I are wondering if they add more voltage . . . to increase speed, say up to 6 volts will that burn up the motors? If each motor (there are two in the gearbox) runs up to 3 volts is the dual motors drawing 3 volts each . . .
Any help would be greatly appreciated!