As a result of continuous use and a few hundred thousand weldings, the welding surface of the sonotrode wears out and may be damaged.
Along with the wear, the resonance frequency of the sonotrode also increases.
These two factors deteriorate the quality of the welding, or causes an operational error (generator overload/frequency error).
Limited, but there is a possibility to renovate the surface of the sonotrode and restore the resonance. For this, you need to know the material of the sonotrode, its photo (from several sides), possibly its drawing (can also be a manual drawing), its working frequency, a 3D model of the workpiece, all available information about the workpiece, the manufacturer of the welding machine, its type, booster strength, etc. .