舵机指南

术语

舵机

A small DC motor attached to servo gears that is very finely controllable and interfaces via a 3 wire PWM connector. Servos are generally used in FTC® for high-precision applications - for example, actuating a claw or lightweight arm. Typically servos have limited range of rotation (180° is common). The output has splines, which are the rigid teeth that are on top of the servo.

舵机通常用于遥控汽车（转向）和遥控飞机（移动副翼）。在 FTC 中，舵机通常用于爪子、抓手和机械臂。

goBILDA Dual Mode Servo

A common servo, the goBILDA Dual Mode Servo

备注

Historically, servos were designed for fine-tuned and accurate movement in low-load applications, not high-load or fast rotation applications. However, modern high-performance servos (often designed and marketed specifically towards FTC teams) have pushed the limits of how powerful a servo can be, resulting in many teams using one or more high-power servo(s) to power mechanisms that do not need the power of a full motor, such as horizontal extensions and active intakes.

不同制造商生产的舵机种类繁多，价格、性能和价值也大相径庭。幸运的是，几乎所有的舵机都使用标准的三线连接器，并接受同一种控制信号（50 赫兹的 PWM 信号）。每个 REV 扩展集线器提供 6 个舵机端口，因此你可以插入任何制造商生产的舵机。此外，FTC 使用的舵机有一个标准尺寸，因此不同制造商生产的支架可以互换。

Commonly used servos used in FTC are the goBILDA Dual Mode Servos and REV Smart Robot Servo, but you should check out other servos as well. Picking the right servo for your application is a question that’s almost impossible to give a blanket answer for. To learn more, please read the 挑选舵机 section.

The most prevalent problem with servos is durability. Internal servo gears in cheaper servos strip easily when subjected to shock loads. Servos are also often poor at handling lateral loads or bending of the shaft. To avoid having to frequently replace servos, choose ones with steel gears and use ServoBlocks or your kit’s equivalent to prolong longevity.