Medicine plastic bottle weighing check weighers are equipped with a vibrating weighing unit to prevent external vibration. The weighing vibration unit uses a high-precision, high-speed, and high-sensitivity weighing sensor. The brushless motor drive module of the online bottle checkweigher provides the motor with high torque, high precision, and a wide speed range, achieving uniform movement of the items, allowing the weighing unit to detect the weight of the items more accurately.