Ultrasonic Cleaners for the Manufacturing Industry
Zenith Mfg & Chem Corp. 85 Oak St., Norwood, NJ 07648-0412 800-432-SONIC (7664) Fax: 201-768-6999
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Ultrasonic Cleaners for the Manufacturing Industry Zenith Mfg & Chem Corp. 85 Oak St., Norwood, NJ 07648-0412 800-432-SONIC (7664) Fax: 201-768-6999
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Sweep Frequency Ultrasonic Systems Attempt to Reduce Standing Waves Before the development of CROSSFIRE Multiple Frequency Ultrasonic Cleaners, and Zenith's Ultraprobe Ultrasonic Test Instrument, it was thought that the Sweep Frequency Circuit, an electronic addition to most ultrasonic cleaners sold today, would eliminate the un-even energy distribution, and standing waves produced in an ultrasonic cleaner. All ultrasonic cleaners distribute their scrubbing patterns as a series of equidistant bands emanating from the transducers. These bands are created as a result of the ultrasonic cleaner producing ultrasonic energy at an un-varying frequency. By varying the frequency slightly to the transducers, the idea was to move the standing wave bands to eliminate any dead spaces in the ultrasonic cleaning tank. Does it work? Yes it works, but only marginally. Sweep frequency ultrasonic cleaners only sweep the output frequency a total of 5-7kHz. Although this will move the standing wave, it may only do so 5/1000ths of an inch. Every little bit helps, and this is why most ultrasonic cleaners today include this technology, including Zenith ultrasonic cleaners. You may be thinking, "Why not sweep the frequency across the entire spectrum to ensure that there are no standing waves at all?" This is a very good question. Ultrasonic transducers act somewhat like a tuning fork used to tune musical instruments. They vibrate at a predetermined frequency based on their mass and physical size. If they are operated only 5-8kHz beyond their Natural Operating Frequencies, efficiency and power is reduced 80% and more. The transducers will vibrate, but with almost NO power, and NO electrical efficiency. This is the primary reason why we feel that our CROSSFIRE system is superior to all other systems. While other pulsed multi-frequency systems require huge power consumptions to make up for the efficiency losses powering transducers outside of their natural frequencies, the CROSSFIRE system powers 40kHz transducers with 40kHz generators, 25kHz transducers with 25kHz generators, and so on, to guarantee maximized ultrasonic power and performance at all frequencies.
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