The S6090’s heavy duty steel gears, digital precision and class leading .09 transit time is ideal for the popular 1/8th and 1/10th surface racing and bashing markets. What makes this speedy servo great is its ability to handle the higher voltage directly from 2-cell Lithium power packs.
Because the S6090 accepts a higher voltage it simplifies setup by eliminating the need for a protective regulator. Spektrum takes advantage of the higher voltage input and turns it into greater performance in the same space as a traditional standard servo. Even though it’s classed as a high-speed servo, the S6090 still has a very impressive 292 oz/in of torque.
Also packed inside the attractive package are high-value features you normally find on a servo costing much more. Fitted with steel gears, a coredless motor, dual ball bearings and heavy gauge lead wires, you can expect durability and long lasting performance.
Digital and analog servos have very similar construction and components. They both use the same type of motors, gears, cases, and have a potentiometer. A digital servo is different in the way it processes the incoming signal and converts that signal into servo movement.
An analog servo when it receives a command to move, takes that signal and sends pulses to the servo motor at about 50 cycles per second, which in turn moves the motor to its required position determined by the potentiometer.
A digital servo has a micro-processor that receives the signal and then adjusts the pulse length and amount of power to the servo motor to achieve optimum servo performance and precision. A digital servo sends these pulses to the motor at a much higher frequency which is around 300 cycles per second. This helps eliminate deadband, provides a faster response to the servo motor, smoother motor movement, and has higher resolution and holding power than an analog servo.
There are some disadvantages to digital servos, but the disadvantages are not in any way close to out weighing the advantages. A digital servo will have a higher power consumption (Around 10 to 15 mAh per servo at idle) than an analog servo due to its higher pulse frequency, so larger capacity battery packs are recommended. Digital servos also are more expensive than analog servos which can get very costly in applications that require many servos.