The rotation speed of the gimbal is an important indicator for measuring the level of the gimbal. The horizontal and vertical directions of the gimbal are driven by two different motors, so the rotation speed of the gimbal is also divided into horizontal speed and vertical speed. Due to the load capacity, the torque of the vertical motor during start-up and operation is greater than that in the horizontal direction. In addition, the actual monitoring requires a higher horizontal speed than the vertical speed. Therefore, generally speaking, the vertical speed of the gimbal is lower than the horizontal speed.
The communication gimbal uses an AC motor with a fixed rotational speed, generally ranging from 4 °/s to 6 °/s for horizontal rotation and 3 °/s to 6 °/s for vertical rotation. Some manufacturers also produce AC type high-speed gimbals, which can reach a horizontal speed of 15 °/s and a vertical speed of 9 °/s, but the load capacity of high-speed gimbals in the same series will be correspondingly reduced.
Most DC gimbals use DC stepper motors, which have the advantages of high speed and variable speed, making them very suitable for situations where rapid target capture is required. Its maximum horizontal speed can reach 40-50 °/s, and its vertical speed can reach 10-24 °/s. In addition, DC gimbals have variable speed functions and provide a voltage that varies between 0 and 36V DC. The effect of variable speed is determined by the performance of the control system and decoder, so that the pan tilt motor rotates at a corresponding speed according to the input voltage. There are two common ways of variable speed control. One is full speed control, which determines the input voltage to the pan tilt by detecting the displacement of the keyboard control lever by the operator. Full speed control achieves a smooth transition of speed within the pan tilt range. Another type is the staged progressive control, which sets several gears within the variable speed range of the gimbal, each corresponding to a different voltage (rotational speed). Before operation, the desired rotational speed gear must be selected, and the gimbal must be rotated in all directions.
