Operating in the rough and tumble environment of 1/5 scale, a servo’s performance is pushed to the maximum. The S9110BL and S9120BL servos have been designed to give 1/5 enthusiasts huge torque and brushless motor precision, taking their driving experiences to a new level.
Starting with a new case design with improved support for pins holding the gears, and a new aluminum top plate with re-designed bearing house, the S9110 and S9120 have been design for improved durability. A new brushless motor design will give more power than any previous Spektrum servos – the high torque S9120 is rated at 1454 oz-in of torque at 8.4v, while the high speed S9110 is rated at 1224 oz-in of torque. The S9110 keeps a similar speed of 0.14 sec/60⁰ at 8.4, while having almost 60% more torque than the previous version! Additional improvements include a sleek new stealth black design and new thicker 18awg wire detachable connector. What’s more, both are already race proven, the S9110BL and S9120 having won the 2020 1/5 Worlds Buggy Class at So Cal Nitro.
No matter if you choose the higher speed S9110BL or the higher torque S9120BL, these servos will give higher performance and additional control whether racing your 1/5 vehicle on the track or bashing through dunes.
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.