It would make sense that variations in the aluminum foil used for testing in the foil test for ultrasonic performance could have a bearing on the outcome of the test. Most people use standard “grocery store” aluminum foil for testing because it is inexpensive and widely available. So let’s talk about that first. The most …
Task At Hand – In a previous blog I declared that I am not a fan of the aluminum foil test for evaluating ultrasonic performance. I question its validity and relevance on a number of fronts. If my purpose here is to question my own skepticism, then I guess I should probably define the factors …
If you’ve heard of ultrasonic cleaning you’ve probably heard of the aluminum foil test. The practice of putting a piece of aluminum foil into an ultrasonically activated tank of water probably began as a novelty demonstration. The holes produced in the aluminum foil by the collapse of cavitation bubbles at least showed that something interesting …
I usually try to make sure I’ve done my research prior to posting a blog. As I was thinking about the post about the ceramic ring test, however, it occurred to me that there are a couple of variables that I had not previously considered – – the pencil and the means of applying the markings to the …
Other than to say that there is no perfect, infallible way, the blog has not addressed assessing ultrasonic performance. In an earlier blog, I did suggest that any of many methods are appropriate to compare ultrasonic performance of an ultrasonic system from day to day but that no further inference should be made. One test that’s …
We have all heard of servos (short for servomechanism) but exactly what characterizes a “servo” is often a cloudy topic. Most sources are in agreement that the centrifugal ball governor invented by James Watt and used to control the speed of steam engines was the first application of a powered servo mechanism. This eloquently simple …
Adding water to cleaning and rinsing tanks is inevitable in a cleaning process. Most modern machines include a means to sense liquid level and add more water or other appropriate liquid as necessary. It would seem simple enough, but there are a lot of factors to consider in managing liquid makeup. The first thing to determine is …
Overflow weirs have specific purposes as they are utilized in industrial cleaning equipment. Also, as one might expect, there are several manifestations of the overflow weir which perform various functions. A simple “standpipe” is a form of weir as is a fitting on the side of a tank located just below the desired liquid level. …
A few more things to monitor – Dirty rinse – An effective rinse is critical to most cleaning processes. Only in very limited cases can residues from the cleaning step be left on parts after they are cleaned. It does not, of course, do any good to clean the parts if they become re-contaminated by a …
Here are a few more variables that can be monitored in cleaning systems in pursuit of a Six Sigma process – Oil laden detergent – A good oil removal system is paramount in controlling the quality of the detergent in a cleaning system. An oily bath can quickly become ineffective in removing additional oil and even …
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