| Electronics > Repair |
| Ultrasonic cleaner size: 10L vs 6L |
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| coppercone2:
I think bigger is better with more isotropic behavior without fringe focusing effect from edge reflection (rounded edges parabola like) that can lead to spot damage |
| tooki:
--- Quote from: SteveThackery on July 11, 2024, 12:05:32 am --- --- Quote from: tooki on July 10, 2024, 09:10:55 pm ---I’ve seen Rolex watches in shop windows though! --- End quote --- I think Rolex are seriously over-rated. People in the know buy Zenith. ;) --- End quote --- Like the old TVs? Just kidding. But I honestly know nothing about watches beyond a few brands I’ve heard of. (Omega, Tissot, Jaeger, and Rolex come to mind.) As impressive as I consider the micro-machining required to make them, I have no use for the product! |
| jpanhalt:
--- Quote from: SteveThackery on July 10, 2024, 05:34:54 pm ---I use non-aqueous fluid for small steel components like watch parts, in order to avoid any risk of rusting. --- End quote --- Jewelers in America used a cyanide containing aqueous cleaner for watches and other jewelry. An uncle was a jeweler from the early twenties for over 30 years. In the 1950's, he was till using the same type of solution. After agitation in the sodium/potassium cyanide solution (probably some other stuff was there too), the basket of parts was rinsed and dried in fine sawdust. He told me a story that when the stock market crashed, some heavily leveraged jewelers drank the solution to commit suicide. That was his way to warn me it was dangerous if not used properly. Apparently, that solution was still available and used in the 21st century: https://www.researchgate.net/publication/281743306_Acute_Cyanide_Poisoning_from_Jewelry_Cleaning_Solutions There are some steel parts in watches, such as stems and mainsprings, but using that wash did not cause rusting. The advantage of aqueous solutions is they are far better than any non-aqueous solution at removing inorganic salts, dirt, dust, etc., and rinse solutions are as cheap as water. EDIT: I am not recommending that solution of ultrasonic cleaning. The degassing effect could increase the danger a lot. |
| mendip_discovery:
I had the transducers on mine fall apart. I fitted new ones using arledite to glue them on. Works great now. I use it for cleaning motorcycle parts, mostly carburettor and stuff. Go big or go home. You will find it easier to use than a small one. I never worried about the bubbles as I thought that was part of the idea of these cleaners as the cavitation is what is doing the cleaning. Then again I don't put boards in mine. |
| coppercone2:
I really think people need to look into electro cleaning. It takes some research but brush and dip electrocleaning are powerful techniques that don't require anything too dangerous (just wear goggles). I electro cleaned my HP RF impedance analyzer test fixture gold parts and they came out looking better, the solution got a little dirty and it took me only a minute with house hold chemicals and the lowest power and cheapest DC power supply I am telling you these methods are powerful, it just requires some things that most people find way too hard (alligator clips and getting the polarity right). I think its because people think that its way more sensitive to the options that you have like partial AC, Pulse, frequency, etc. Really, the parts are not going to get easily messed up Same for the weld cleaning industry, they made up a paper tiger out of all the god damn options that you have. What current, if its AC or DC or what brush... jesus.. it might have a bit of use if you wanna get the settings right for the first time for grumpy ass welders that refuse to put down the grinder... but its like the most insensitive god damn thing there is. You tune it with a current knob while your working to get the correct results like finding a radio station... but if you read the literature they make you feel like your part is gonna fucking disintegrate if you get it wrong LOL. I think alot of people shy away from the process because they have some ridiculous idea about how it actually ends up working in practice. The reality is kind of like deciding how hard you need to rub a brillo pad. The impression from literature is that its working with a overloaded Romulan Disruptor. |
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