You are absolutely right. It took me three tires to get the frequency and
power right. First time around I had a 150W transducer and I noticed pitting
under a 5X magnifier on the pins I was cleaning. The other prototype had a
transducer with a resonant frequency of 40KHz nominal and I was not getting
a good cleaning action. I am sure there are rigorous theoretical analysis of
ultrasonic cavitations out there you could use to get the frequency and
power right; I would appreciate a mail about any you find.
Regards
Madhu

>----- Original Message -----
>
>Don't you have to be carefull about the frequency and power? Isn't there a
>problem with pitting at the surface of the object to be cleaned?
>
>Regards
>Sergio Masci

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