Post by thread:[OT]: Ultrasonic cleaner

Hi list, Has anyone of you dismantled a cleaner (desktop type) ? Which frequency is used ? I have never seen one from the inside (yet) , but I guess it works more or less just like a loudspeaker, with a stainless steel tray instead of the cone ? Is the frequency critical, or would any ultrasonic frequency do ? How much power is needed ? More for a big tray, less for a small, I guess... Regards Attila - SM4RAN -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Funny you should ask that. We were given an ultrasonic cleaner last week that does not work. I have it planed for one of my students to open it up tonight and start troubleshooting it to figure out what's wrong with it. I had to double check you're email address to see if the question was a prep-question from the student who will be doing the work :-) We'll take some pictures for you so you can see inside one. Scott At 01:53 AM 4/7/04, you wrote: {Quote hidden}>Hi list, > >Has anyone of you dismantled a cleaner (desktop type) ? Which frequency is >used ? > >I have never seen one from the inside (yet) , but I guess it works more or >less just like a loudspeaker, with a stainless steel tray instead of the cone ? > >Is the frequency critical, or would any ultrasonic frequency do ? How much >power is needed ? More for a big tray, less for a small, I guess... > >Regards > >Attila - SM4RAN > >-- >http://www.piclist.com hint: The list server can filter out subtopics >(like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

I just finished designing one at work (none of the COTS met specs..) and the frequency was 60KHz, at 50W. I had a PLL and FETs doing the switching. It will be used to clean up DNA from specially coated stainless tips on a machine. I have seen cleaners go as low as 40KHz. From what I understand, the finer the particles you need to break up the higher the frequency. The wattage of course depends on the amount of cleaning fluid in the tank. This web site (among others) has some good technical links: http://www.bluewaveinc.com/ Madhu >{Original Message removed}

----- Original Message ----- From: Madhu Annapragada <spam_OUTmaprTakeThisOuTCOMCAST.NET> To: <.....PICLISTKILLspam@spam@MITVMA.MIT.EDU> Sent: Wednesday, April 07, 2004 4:01 PM Subject: Re: [OT]: Ultrasonic cleaner > I just finished designing one at work (none of the COTS met specs..) and the > frequency was 60KHz, at 50W. I had a PLL and FETs doing the switching. It > will be used to clean up DNA from specially coated stainless tips on a > machine. I have seen cleaners go as low as 40KHz. From what I understand, > the finer the particles you need to break up the higher the frequency. The > wattage of course depends on the amount of cleaning fluid in the tank. This > web site (among others) has some good technical links: > http://www.bluewaveinc.com/ > Madhu 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 http://www.xcprod.com/titan/XCSB - optimising structured PIC BASIC compiler -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

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 -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

While we are on the topic of US cleaners. We have a commercial unit and have been using Ultralube 2000 Safewash cleaner. It seems to leave a residue, is anyone else out there using this ? Do you have this problem ? It seems the Isopropyl Alcohol leaves a better finish. Kind Regards David Huisman (CEO) ----------------------------------------------------------------------- ORBIT COMMUNICATIONS Pty Ltd - Wireless Solutions that Work (Telemetry, Control, Monitoring, Security, HVAC ...) A.C.N. 107 441 869 Website : http://www.orbitcoms.com PO Box 4474 Lakehaven NSW 2259, AUSTRALIA Phone: 61-2-4393-3627 Fax : 61-2-4393-3685 Mobile: 61-413-715-986 {Original Message removed}

> We have a commercial unit and have been using Ultralube 2000 Safewash > cleaner. > It seems to leave a residue, is anyone else out there using this ? Do > you have this problem ? > It seems the Isopropyl Alcohol leaves a better finish. Yes. That tan coloured stuff. Are you using a no clean flux ? Safewash works great for ye olde rosin core stuff but no clean is intended not to be cleaned and is really stubborn. If I use IPA or fluxclene, it cleans the (no clean) flux off but leaves a thin sticky residue over everything unless I use large amounts of IPA. My current method is a quick fluxclene scrub and then the safewash / water / saferinse sequence. Steve. ========================================== Steve Baldwin Electronic Product Design TLA Microsystems Ltd Microcontroller Specialists PO Box 15-680, New Lynn http://www.tla.co.nz Auckland, New Zealand ph +64 9 820-2221 email: steveKILLspamtla.co.nz fax +64 9 820-1929 ========================================= -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

part 1 1746 bytes content-type:text/plain; charset="ISO-8859-1"Steve, The stuff we use is a sky blue colour. Kind Regards David Huisman (CEO) Orbit Communications Pty Ltd Wireless Solutions that Work Ph: +61-2-4393-3627 Fax: +61-2-4393-3685 Web: http://www.orbitcoms.com {Original Message removed}

> The stuff we use is a sky blue colour. I was referring to the residue. Steve ========================================== Steve Baldwin Electronic Product Design TLA Microsystems Ltd Microcontroller Specialists PO Box 15-680, New Lynn http://www.tla.co.nz Auckland, New Zealand ph +64 9 820-2221 email: .....steveKILLspam.....tla.co.nz fax +64 9 820-1929 ========================================= -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

The simple ones use a power oscillator that deliberately shifts in frequency, operated with rectified unfiltered (!) ac. This prevents standing waves in the tank and gets at the dirt better. Better ones have a special circuit that modulates the osc. to achieve the effect above. The ultrasound level present in these when working is dangerous. It can cause burns, pain, and fire if inappropriate materials are used in it. What are you trying to do ? Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

You can try with "carburettor alcohol" - what's it called in english btw ? About 80% isoprpyl alcohol, and some detergent is what's inside... And it's far cheaper than 100% isopropyl alcohol. Be aware of fire, and vapors from alcohol might not be good for your health... and, as well as 100% alcohol, it might be aggressive with some plastics.... regards Attila SM4RAN -----Ursprungligt meddelande----- Från: Orbit Communications <EraseMEinfospam_OUTTakeThisOuTORBITCOMS.COM> Till: PICLISTspam_OUTMITVMA.MIT.EDU <@spam@PICLISTKILLspamMITVMA.MIT.EDU> Datum: den 7 april 2004 23:16 Ämne: Re: [OT]: Ultrasonic cleaner {Quote hidden}>While we are on the topic of US cleaners. > >We have a commercial unit and have been using Ultralube 2000 Safewash >cleaner. > >It seems to leave a residue, is anyone else out there using this ? Do you >have this >problem ? > >It seems the Isopropyl Alcohol leaves a better finish. > >Kind Regards > >David Huisman (CEO) >----------------------------------------------------------------------- >ORBIT COMMUNICATIONS Pty Ltd - Wireless Solutions that Work >(Telemetry, Control, Monitoring, Security, HVAC ...) >A.C.N. 107 441 869 > > >Website : http://www.orbitcoms.com >PO Box 4474 Lakehaven >NSW 2259, AUSTRALIA >Phone: 61-2-4393-3627 >Fax : 61-2-4393-3685 >Mobile: 61-413-715-986 > >{Original Message removed}