With an adjustable crank pin to control the length of stroke. As the bullgear rotates, the rocker arm is.
惠氏机构的电机转动重载齿轮，驱动一个带有可调整销钉的曲柄以便控制进、回程的长度。
2
For increased accuracy and repeatability, the unit can be supplied with an external anti-backlash POM (polymer) pinion gear which optimizes coupling to the wind turbine's large yaw bullgear.