 | | RE: micro motor jam —Ralph Hempel
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| | | (...) Yep. It's a common problem. I have 3 of them and they all tend to fail this way. Be careful that you don't actually JAM the motor. Ther is a little thermal cutoff that you can actually hear clicking when the motor is overloaded. It might take (...) (25 years ago, 13-Apr-00, to lugnet.technic)
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| | | | | Re: micro motor jam —Henry Chea
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| | | | (...) When I took a jammed micromotor apart, I could not find any thermal cutoff circuitry at all. What I did find was that the internal gears use very small teeth, but there was enough freeplay in the gears' rotational axis that it was easy to get (...) (25 years ago, 13-Apr-00, to lugnet.technic)
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| | | | | | Re: micro motor jam —Philip Ogston
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| | | | (...) gears (...) I haven't taken my micromotor all the way apart, just popped the face off. But from my cursory investigation it appears that the micromotors use an unusual arrangement of gears, which I think is called a planetary gear. As far as (...) (25 years ago, 16-Apr-00, to lugnet.technic)
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| | | | | | Re: micro motor jam —Henry Chea
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| | | | (...) Yeah, I think they should be called planetary gears too, but I am just about as sure as you are... The gears are supposed to move in a certain fashion, but their fit is so loose that it is easy for the teeth of the gears to step on top of each (...) (25 years ago, 16-Apr-00, to lugnet.technic)
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| | | | | | Re: micro motor jam —Philip Ogston
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| | | | (...) Nope, I'm wrong. Turns out a planetary gear arrangement is a sort of coaxial non-reversing gear reduction thingy good for high torque applications and resistant to skipping... um, well there's a diagram of one at (URL) near the bottom of the (...) (25 years ago, 18-Apr-00, to lugnet.technic)
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