Ultrasonic cleaners, Anyone use them, have one Options

[r_towle]

Most importantly.

Does anyone know how to make an ultrasonic cleaner?
Is it just vibration, or does the vibrating motor need to be tuned to a specific frequency.

If I use an old hand drill with a concentric hub on it, and a variable speed power supply, can I get it to the correct frequency?

If I can, how will I know I am at the correct frequency?

Rich

[Katmanken]

Ultrasonic means "beyond sound" and for a cleaner, frequency is rarely discussed.

Make an ultrasonic device? Yes I have. If Ya wanna cut and cauterize tissue, 55 khz is the magic frequency number. It involved a whole lotta math, transducers, precise mechanical components, vibrational analysis of resonant systems, fricking exacting tuning, and a whole lot more.

I've seen a lotta small cleaners for rings and ink pen tips but not a lot for bigger stuff. It can take a ton of power for larger systems to shake that much mass and the surgical ultrasonics use a load sensitive generator that dumps in more power as the load goes up.

As per the little flashes of light that sometimes occur in liquids, some think they may be fusion power......

Ken

[r_towle]

Ultrasonic means "beyond sound" and for a cleaner, frequency is rarely discussed.

Make an ultrasonic device? Yes I have. If Ya wanna cut and cauterize tissue, 55 khz is the magic frequency number. It involved a whole lotta math, transducers, precise mechanical components, vibrational analysis of resonant systems, fricking exacting tuning, and a whole lot more.

I've seen a lotta small cleaners for rings and ink pen tips but not a lot for bigger stuff. It can take a ton of power for larger systems to shake that much mass and the surgical ultrasonics use a load sensitive generator that dumps in more power as the load goes up.

As per the little flashes of light that sometimes occur in liquids, some think they may be fusion power......

Ken

From what I have been reading, the lower the Mhz, the larger the cavitation bubbles...so it removes larger deposits ofr crud. Higher frequency does a better job of cleaning small delicate parts with smaller bubbles that are closer together..
I got the basic principles.

Now, I want to build a cleaner like Mark Henry did, but large enough for a motor, or larger parts...I want to use a motor that I can find...not a $1500 sealed special motor....blah blah.. So, help me out here. How would I determine the frequency of a motor...

Here is what I have and what I want.
I have a few large stainless steel sinks, free standing (previously used to wash large dogs...) I have loads of motors.

From my simple mind, here is the idea.
Take a motor and mount it to the outside, like Mark Henry did with his little cleaner. On the shaft of the motor I will attach a metal pulley made from solid aluminum. This pulley will be drilled on the edge to allow me to add bolts on the outer edge to tune the vibration. I have a variable speed system that I use on my router table that allows me to run the motor as slow as I want, and as fast at the motor will go, its a dial/POT in a box.

How would I measure the frequency, or even better, is there some math formula (that I can understand) that will tell me at speed X you produce Y frequency.

If you look at the limited information online and at the manufactering web sites of these cleaners you will notice that none of the ultrasonic cleaning companies tell you what frequency they are running at.
This LACK of information makes me believe deep down that this is really simple and the capitalist market is just hiding the information so they can sell $3500 sinks with elec motors attached to make them bubble.

So, take the sink, pick a motor, no heat, and lets figure this out.
I have an electronic eraser that I will try first, similar to an engraver, it vibrates at high speed. I have motors that range all the way up to 20,000 rpm's.

Rich