changing servo travel
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Here is a link you might find helpful. Page 51 of this document discusses
modifying the travel of a HiTec servo. A few
pages along is a mod for an S148.
http://www.amya.org/us1mpt4.pdf
Insufficient servo travel is a fairly common problem for r/c sailboat modelers.
We need winches, that is, servos that
travel 3 or four revolutions. We also use servos to swing arms through very
wide arcs.
The two fixes suggested at this link are 1) adding resistors to the "legs" of
the pot element and 2) adding a multi-turn
pot. Solution 1 might work for you. You could start with a couple of trimpots
to determine experimentally the
resistance you need to get the 270 degree deflection. If you prefer, you can
then replace the trimmer with a pair of
more compact fixed resistors.
Best, Michael
modifying the travel of a HiTec servo. A few
pages along is a mod for an S148.
http://www.amya.org/us1mpt4.pdf
Insufficient servo travel is a fairly common problem for r/c sailboat modelers.
We need winches, that is, servos that
travel 3 or four revolutions. We also use servos to swing arms through very
wide arcs.
The two fixes suggested at this link are 1) adding resistors to the "legs" of
the pot element and 2) adding a multi-turn
pot. Solution 1 might work for you. You could start with a couple of trimpots
to determine experimentally the
resistance you need to get the 270 degree deflection. If you prefer, you can
then replace the trimmer with a pair of
more compact fixed resistors.
Best, Michael