There may be the following situations: 1, the taper of copper tube is too large, and the drawing resistance is large. Outside the cooling section, the billet and the roller can be seen flying and descending 5 times. 2. The signal of the liquid level detection system is unstable and interfered, and the wire drawing speed changes too much. 3. The drawing speed actuator is stuck and the rotation is not flexible. 4. There is a big gap between the roller of the straightener and the shaft hole of the turbine box. Step 5: Arc ... 565555555556