No matter what is being measured, it is critical that the measuring instrument chosen be capable of providing an accurate and repeatable measurement of whatever needs measuring. It sounds simple – – but isn’t. In general, the larger the scale the less accurate an instrument becomes. Let’s use weight as an example. Weighing devices come …
Metrology, simply, is the science of measuring things. Metrology is used extensively in the world of industrial cleaning to both control and quantify cleaning processes. Finding the right equipment and procedures to produce accurate and meaningful results is often a challenge for those without extensive knowledge of the science. The upcoming blogs on metrology are …
Over the years I have had many hundred people approach me with potential applications for ultrasonic deburring. There are many references to ultrasonic deburring in the literature going back decades in time so it’s not unlikely for the question to be asked. In fact, ultrasonic deburring may have limited application but requires certain very special circumstances in order …
It occurred to me several years ago that when we look at an ultrasonic cleaning tank, we are usually looking in from the top. I wondered how ultrasonics looked from a “fish eye” view which spawned (get it?) what is now called the ultrasonic fish tank in our Jamestown, NY laboratory. In upcoming blogs, I …
Before we get to today’s topic, we have an announcement! Many of you may have recently subscribed for email updates of the blog either on your own or as a result of emails sent out by the Cleaning Technologies Group. The names of those of you who did were entered into a drawing for an ipad (wish I could …
There are a number of metal finishing process which should be avoided in the manufacture of items subject to demanding specifications with regard to the presence of particles. These common processes, although employed with the best intent, result in the generation or unavoidable entrapment of particles which may be released under use conditions with potentially …
Some substrate materials are inherent particle generators and may never be cleaned to the point of there being no particles present. With these materials, particles are a way of life and can not be avoided. This, of course, makes cleanliness testing using particle analysis a difficult if not impossible task. The difficulty is exacerbated by …
Before we leave the subject of particles and particle counting, there are some things we need to touch on regarding “exceptional” particles. In an earlier blog, Particles That Don’t Count?, we discussed briefly some particles that may or may not count when it comes to analyzing the cleanliness of a part. These and several other kinds of …
In recent blogs we have been talking, for the most part, about particles that are relatively large – ones you can see, touch and feel. There is a world out there, however, that worries about particles that are very tiny. I’m talking about particles that are smaller than tens of microns in dimension. An earlier …
Now it’s time to see the results! Particles have been harvested, collected and are ready to either be weighed or counted. The first step in evaluating cleanliness using either method is to examine the specification. There are two basic types, part-specific and generic. Part-Specific Specifications – Part-specific specifications will state the sample size in number …
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