Ultrasonic Performance – Ceramic Ring Test – Post Script

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 …

Ultrasonic Performance – Ceramic Ring Test

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 …

Servos

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 …

Six Sigma – Monitoring Variables in Cleaning – Part 3 (final)

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 …

Six Sigma – Monitoring Variables in Cleaning – Part 2

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 …

Six Sigma – Monitoring Variables in Cleaning – Part 1

As discussed earlier, monitoring variables in a process is a critical part of Six Sigma.  The following are some examples of parameters that can be monitored in a cleaning process and some suggestions regarding how the monitoring can be done. Chemical Concentration – Chemistry (detergent, acid, rinse aid, etc.) is one of the most important components of the …

Six Sigma – Process Selection and Monitoring

In order to achieve six sigma results, one must evaluate, measure and statistically control ALL phases of the cleaning process.  A typical cleaning process is comprised of three main stages – – washing, rinsing and drying.  Each of these must be addressed and controlled separately as any one of the three being out of control …

Chemistry – Tips on Temperature and Concentration

When parts aren’t coming clean two of the first things most process engineers target as potential problems are the temperature and concentration of the chemistry.  These are, in most cases, good bets but one should resist knee-jerk reactions. Chemical Concentration – One of the common knee-jerk reactions to a cleaning problem is to increase chemical …