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Posted by Edward C. Kern on November 9, 2005, 9:58 pm
Please log in for more thread options fulliautomatix wrote:
> redbrickhat wrote:
>
>> Could someone explain how a 6 wire servo works? I found one when I
>> opened up an RC toy car from Radioshack.
>>
>> It has 2 wires that go to the motor and 4 wires that go to some kind of
>> pot I think: on a small board are 2 etched concentric circles which are
>> in contact with a 4-pronged device mated to the spinning gear. Two of
>> the 4 prongs touch the outer circle, the other two the inner circle.
>>
>> I know how to program 3 wire servos but don't understand the purpose of
>> the extra "pot" of the 6 wire servo.
>>
>
> might it be some sort of quadrature encoder?
in a rat shack product? not bloody likely. probably just some strange
kind of pot. the point here is, though, that you're not describing any
electronics, which would be required for servo operation. it's not all
that hard to build your own but it's probably cheaper and easier to just
rip out the whole mechanism and put a proper rc servo in.
chris
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> opened up an RC toy car from Radioshack.
>
> It has 2 wires that go to the motor and 4 wires that go to some kind of
> pot I think: on a small board are 2 etched concentric circles which are
> in contact with a 4-pronged device mated to the spinning gear. Two of
> the 4 prongs touch the outer circle, the other two the inner circle.
>
> I know how to program 3 wire servos but don't understand the purpose of
> the extra "pot" of the 6 wire servo.
>