In the original stable operation of the liquid electrostatic rotating cup, the spray amplitude deviation, the edge gap, the white space in the center are enlarged or the large paint droplets are thrown out. It is not possible to "top back" by increasing the speed, shaping gas, paint pressure or electrostatic voltage.The correct order is: Immediately control the risk and freeze the on-site evidence to → determine whether the atomization body is abnormal or electrostatic deposition abnormal Check the → actual rotation speed, whether the paint supply flow and pressure are stable → Check the rotating cup/cup head, the central paint supply nozzle and the shaping → gas channel Check the paint status and filtration → Finally verify the high pressure, grounding, spray distance and workpiece site shape. where three boundaries should first be identified: Leaving the center blank does not necessarily equate to a malfunction. Droplet clouds formed by high-speed rotational atomization may naturally have a circular or relatively thin central cross-section.Fault determination is more supported only if it is suddenly enlarged compared to the normal benchmarks of the equipment, cup heads, coatings and process formulations, or if it is accompanied by excessive weight of the outer ring, eccentricity, pulsation, abnormal rotational speed and large paint droplets. Dumping large paint droplets is a priority stop spray check signal. Large droplets may come from paint shedding, liquid film rupture, paint supply pulsation, reduced speed, cup edge damage, contaminated particles or cleaning residue. Continued spraying will expand workpiece defects and may aggravate mechanical imbalance and contamination. The stability of the set value is not equal to the stability of the actual state. It is necessary to look at the actual speed, the actual flow, the supply pressure, the actual pressure of the shaping gas, the material temperature and the alarm trend, not just the formula setpoint.
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