| Connecting Servo Motors
Servo Motors
All modern servos have three wires;
signal, power, and ground; with the power being the center wire.
With the power pin in the middle, if you make a mistake and connect
the servo backward, nothing will "burn up". Years ago Airtronics/Sanwa
has the power pin on the outside, which means numerous burned
servos and receivers. Since then Airtronics/Sanwa have gotten smarter and
choose the same convention of wiring as everyone else. The "new" Airtronics
is called Airtronics-Z and has a blue connector. So if you have Futaba, Hitec,
JR, GWS, Aitronics-Z, etc... servos; they are all wired the same
way; and most have the same connector. The small exception being the
Futaba (J), which has an extra tab at the signal end (shave off the
tab and you'll have the same connector as others).
Often you will see the term "universal connector" for servos.
This just means it has the same connector type as Hitec, JR, and
Air-Z. A universal connector will connect to any modern receiver
(and servo controller like the SC-8000); including Futaba receiver
(the polarity tab is simply not used).
A "white dot" on the SC-8000 housing specify the "signal" wire.
You should also be able to see the circuit board through the
opening; the pin closest to the circuit board is "ground". Depending
on the servo brand, the signal wire color may be different.
Airtronics-Z: BLUE; Hitec: YELLOW; Futaba J: WHITE; JR: BROWN.
Note for servo extensions. At times, especially in animatronics
applications, servo extensions are used. If you are using a "universal
connector" servo extension, a Futaba connector will not go in the
female end of the extension. Just shave off the small polarity tab on
the Futaba J connector in this case.
Power for Servo Motors
| The power port on the SC-8000 requires a 4.8V to 6.0V power source
with a standard 2.1mm power connector (center positive).
This can be an AC adapter or a battery pack. |
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Depending on the types and number of servo motors used, the power
must be sufficient to drive all servo motors or you may have
sluggish results: servo motors moving slower than anticipated, or do
not move at all. If you are using digital servos, the power
requirement can be much higher than standard servos. Please see our
online shop for various AC adapters available.
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