The laser power can be adjusted by entering either 0 to 5v analog signals or PWM signals.
激光功率调节既可以输入0到5 V的模拟信号，也可以输入PWM信号用以控制激光功率的大小。
Pulse Width Modulation, or PWM, is a technique for getting analog results with digital means.
脉冲宽度调制或PWM，是通过数字均值获得模拟结果的技术。
As the existing great power consumption of empty-load or light-load, the bipolar PWM control can be applied only in small or middle power servo control systems.
在轻载或空载时由于存在大的功率损耗，双极性PWM控制只能被应用于中、小功率伺服控制系统。
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