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Originally Posted by jhautz
Id be a little concerned about putting magnets that powerful that close to the magnets in the motor. Who knows... Maybe they would cancel each other out and you would loose power in the motor.:005:
Seriously though. I think that magnets would weigh an awful lot. Remember, adding weight to the pinion has a MUCH larger effect on the total rotational mass than adding weight on say the wheels.
A crazy Idea I had was wanting to design a slipper clutch that worked like the keyless chuck on a power drill (but smaller obviously). Having numbers around the outside and you just hold the spur and rotated the slipper to dial in your desired tention. That way when you found the tention that worked, you could always go right back to it without guessing.
BTW: So when are you going to start working on the prototype of this slipper idea???:p
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The magnets would have neglible effect on the motor magnets. Having magnets coupled together like I'm thinking of provides a path for the vast majority of the magetic flux to flow. Very little flux should be present within an inch away, at least not enough to affect the motor in any way. As far as the magnet weight is concerned; I see your point. That weight would act like a flywheel of sorts and might reduce motor spin-up. Hey, it was just an idea.
The drill chuck idea may be an alternative. I have no idea how that works though since it seems to rely on some type of ratcheting resistance. Making as small as it would need to be to fit in the sapce allocated may compromise its strength.
Keep the ideas coming. :)