Keeping drive motors cool

[DampRobot]

Originally Posted by MichaelBick

We chose 550s over the 775s because we didn't want to deal with the case shorting problem.

IIRC, the 775 (when run at the same voltage as the 550) has more or less the same characteristics in terms of power, free speed, stall torque, etc. as a 550. However, since it is a larger motor, it performs much better thermally when stalled and when run over a long period of time. If you're worried about overheating, consider trying out 775s. I really like them as motors.

I can't really speak to the case short issue, as I've never seen a 775 case short, only a AM PG-71. However, I've heard through the grapevine (was this you, Adam?) that since 775s are a less common can size, China has more trouble manufacturing them correctly. Perhaps now they have a bit more experience, they're manufacturing them with fewer case shorts.