The outer diameter measuring and controlling instrument can be installed either before or after the cooling tank. When installed
in front of the sink, because the measuring head is close to the extruder, the feedback control is timely, and the best control
effect can be obtained, but the plastic has not been cured, and the nominal value set should be corrected appropriately. When
installed in the sink, the measured value is the actual value of the outer diameter of the cable, which is more accurate and
reliable, but the control lag is large, and the control effect is slightly worse. In addition, it should be noted that the cable
to be measured should be blown dry, otherwise the water film outside the cable will affect the measurement accuracy, and the
nominal value should be appropriately increased according to the degree of water with the measured object in actual use.