FAQ: I measured my acoustic stack and the results were satisfactory being the Qm above 1600 and the frequencies within tolerance. But this set does not operate correctly on the machine. Is there any reason for this? What can I do?
The Sonotrode's large size masks the drecreasement in Qm caused by problems. Stacks that have large sonotrodes have high Qm. Thus, problems such as cracks, frequency mismatch and poor coupling will reduce the Qm, but this reduction may not be enough for it to be below 1000.
For example, a big stack in good condition may have a Qm of 6500 and when affected by some problem have the Qm reduced to 1600. This stack has a problem that reduced the Qm value to less than half, however, as the Qm is still greater than 1000, it would erroneously pass the basic criteria of the TRZ® Software.
Comparison between reference stack and apparently approved test stack.
We recommend that, when starting to use the TRZ® Analyzer, the user tests acoustic stacks in good condition in order to refine the TRZ® Software criteria for their particular cases.
Additionally, it is important to test the converter alone, then the converter with the booster and finally the complete stack. It is possible that good parts will end up compensating for defective parts and, on average, the final measurement will report acceptable parameters.
Learn more about testing converters and acoustic stacks.