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Stall current is how much the motor will draw when it is stuck, i.e. stalled. Free current is how much current it draws when the motor has no load, i.e. free to spin. … As you'd expect, the more strain on the motor, the more current it will draw in order to move; the stall current and free current are the maximum and minimum, respectively. …

So both will work separately, but the actual characteristics of the 2 motor within the very small timeframes of a "minimum" move at relatively high speed will not be in synch .. and thus the 2 motors …

On page 9 of that PDF it starts talking about how to waterproof a hobby motor with a film canister and toilet bowl wax. …

You'll have to determine yourself whether a motor controller shield is compatible and can be stacked on your existing shield. In some cases, you can use Arduino's SPI. … In other cases, you'll need to check whether the pins that your shield uses would conflict with the pins needed by a motor controller. …

I think the term you're looking for is outrunner (vs inrunner): This type of motor spins its outer shell around its windings [...] … Inrunners (which are what most people think of when they think of a DC motor) are high-RPM motors with low torque, which usually require some kind of mechanical transmission to be practical. …

after you pick your motor. … There are also a lot of guides for this (like this one, providing the image below) that explain how to choose the propeller based on the power of the motor that you've already selected. …

One way to do this is complicated, involving computer vision and a robot arm or other manipulator that can directly affect the orientation of each rock. The low-tech way to do it would be to use a se …

"Precision motors" and "planetary gear motors" aren't really describing the same attribute of the motor. … Because each rotation of the motor shaft results in a very small movement of the gear system's output shaft, you could also say that planetary gears offer you very fine precision in the output. …

your question, you are asking whether a vehicle balancing on two wheels (or two wheels and one caster) will be able to move straight, or at least predictably, if both wheels were driven from the same motor …

For that calculation, check out this question on calculating left and right motor speeds based on desired throttle and direction. …

Why your charger won't run the motor Your charger should be fairly underpowered for running the motor. … Has debris been introduced into the motor assembly, or is it poorly lubricated? …

Technically, you'd be able to adapt a 4WD differential to a 3WD case, but you'd have to use a single motor for that. … It might be as simple as switching your motor controllers to just set identical torque, based on a desired average speed between the 3 of them. …

The wattage rating is usually (read the manufacturer's specs very carefully) the measure of how much power the motor can draw. It doesn't tell you anything more than that. … Wattage does not tell you whether the motor is efficient at converting the input electrical energy into output mechanical energy. …

Dead reckoning is not a measurement, it's a form of estimation. It is by definition inaccurate, and accumulates error over time. We use it when more precise forms of position measurement aren't avai …

Depending on the amount of current you are trying to send, the slight variations in impedance that your slip ring will produce as it spins can damage some motor controllers. …