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Depending on the characteristics of the motor, some manufacturers use a thicker wire when building motors with fewer windings -- allowing more current to flow. … So, it's possible that the same amount of copper wire is being used for both motors, or that it's near enough not to bother with pricing the different motor types differently. …

Since you are trying to affect the acceleration as well as the endpoints, you should consider using a PID controller. That will provide the effect of braking, but it will do so as part of the larger …

A solenoid would be similar to the spring mechanism that's used in pinball machines. You may have some trouble actuating it to produce exactly the same amount of force every time, however. You might …

It sounds like the main problem is that you are powering your control electronics and power electronics off the same battery. The battery voltage will drop when it's under load, and that drop seems t …

If you know how much force should be on the rope, you could simply mount the winch against a spring that takes that same amount of force to compress. Then, just use a limit switch to detect when the …

Think of it this way: when the motor can't turn (being stalled), it's at its maximum load -- you can't make it turn slower than zero$^*$. … Whichever battery you use should be able to supply just over 10A peak current, if you want to get the maximum performance from this motor. $*$ In practice, you can make a motor run backwards (such …

From that page, This speed adjuster plugs into the radio control inputs of the motor controllers. So my guess would be that CTL is short for "Control". …

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. …

There are heavy-duty winches that accomplish this by having a clutch in addition to the winch motor, so that when the clutch is disengaged the cable can unspool freely. … There are several ways you might do this, from electrical measurement of the motor load to physical measurements on the string/spider position. …

An orrery just represents the different speeds at which planets orbit the sun by careful selection of gear ratios. Here is a set of plans that define the gears themselves, but you could calculate t …

Yes, Crouzet's 82860502 documentation doesn't seem to be very helpful. According to this post on their forum, the wiring is as follows: Brown wire: + VDC encoder supply Yellow wire: encoder output …

To enable reverse, a popular design is to use an H-bridge (essentially a circuitry version of manually flipping the polarity of the wires) placed between your ESC and the motor. …

In general, if you know about how large of a propeller you want (relative to the size of your vehicle), you should be able to work backwards from there to find the ideal motor torque/RPM to support that …

Could you start the rolling with some sort of scraping action, and use rollers to control it from there? For example: http://www.youtube.com/watch?v=5xhbctEcAAA#t=90 The challenge would be making …