Weighing filling machines on the market generally use the constant flow rate of the pump for filling. This type of filling machine has the following disadvantages: if the filling efficiency is to be ensured, a large flow rate filling is required, and the error is large when the filling flow rate is large; if the filling accuracy is high and the error is small, it is required to be very low. The flow rate is filled, and the filling flow rate is small, but the error is small but the work efficiency is low. This problem has not been solved. YTK-M90 automatic frequency conversion micro-filling machine effectively solves the above problems. It uses a high-precision peristaltic pump to work with the inverter. After the start of filling, the pump first fills at the maximum flow rate, ensuring fast and efficient filling. When the filling volume is about to reach the set weight, the inverter automatically slows down the pump flow rate. When the filling volume reaches the set weight, the pump is turned off to ensure the accuracy of filling. After repeated tests, the accuracy of the actual filling effect is shocking!