From the perspective of ultrasonic waves themselves:
1. Transducer aging, such as the original 20K transducer, will cause frequency deviation after long-term use (such as a 20k transducer, which may deviate to 19.5K after aging)
2. Capacitor/circuit aging: Aging of capacitors in the control box, oxidation of circuit solder joints, etc., will cause mismatch between the output frequency and the transducer
From the perspective of raw materials:
1. Paper thickness and gram weight. The higher the paper thickness and gram weight, the greater the vibration required, but high frequency will cause the transducer to overload.
2. Material and thickness of the coating layer:
Different coating materials have different melting points and require different vibration frequencies.
Different coating thicknesses require different vibration frequencies. For example, if the coating thickness is >50μm, ultrasonic waves will take longer to penetrate, which will directly reduce the speed of the machine.