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  • R1885 commented on JaredsProjects's instructable Combat Robotics Tutorial3 years ago
    Combat Robotics Tutorial

    Yes. The higher the gear ratio, the slower the motor will spin, but it will improve acceleration and reduce stress on the motor. Don't go gear to high, though. Too high and the speed of the robot will be a crawl.Wheel size effects the gearbox, not the other way around. A larger wheel requires more toque to spin(ie; will cause the motor to eat more amps), but will also improve top speed. Beware, if the wheel is too big, the motor WILL fry itself just trying to spin it. Smaller wheels require a lot less effort to turn, but will result in lower overall speed.What kind of speed and acceleration you'll need will depend on what the bot is doing, the weight of the bot, and the size of the arena. My rule of thumb is to be at max speed by the time you've reached the middle of the arena, any spee...

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    Yes. The higher the gear ratio, the slower the motor will spin, but it will improve acceleration and reduce stress on the motor. Don't go gear to high, though. Too high and the speed of the robot will be a crawl.Wheel size effects the gearbox, not the other way around. A larger wheel requires more toque to spin(ie; will cause the motor to eat more amps), but will also improve top speed. Beware, if the wheel is too big, the motor WILL fry itself just trying to spin it. Smaller wheels require a lot less effort to turn, but will result in lower overall speed.What kind of speed and acceleration you'll need will depend on what the bot is doing, the weight of the bot, and the size of the arena. My rule of thumb is to be at max speed by the time you've reached the middle of the arena, any speed you'll have will be more than enough to work with. My current antweight(1lb) runs a pair of 11:1 Fingertech spark motors at 7.4 volts(Unloaded speed of 1049rpm) with 1.5" wheels, and the speed and acceleration are spot on for my needs. You may need to bump up the gear ratio or change the wheel size to get a speed you will like.

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