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Shock Pulse Method
#1 Spm’s Trend Monitoring Analysis
software can discern slight changes in
information and predict its acceleration
rate, thus providing time lines in which to
make adjustments or corrective actions,
months in advance of becoming a critical
issue.
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Vibration Analysis
#1
Vibration analysis can only detect damage after it has
occurred to a significant degree. Claiming Vibration
Analysis is a “Predictive Technology” is misleading. |
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2 SPM technology continuously takes readings for up to 90 seconds. Depending on the subject being tested, SPM will obtain a maximum of 1500 readings per second. |
2 Only two readings are taken for each
test point during a single testing session. In many cases
tests are conducted on motor bearings, gearboxes and
smaller roll bearings only. |
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3 Due to the short amount of time it takes to obtain readings of individual test subjects, up to 3 (three) times as many tests can be conducted in a single testing session. The average number of tests conducted during a single testing session is 150 (one hundred-fifty). |
3 The time required to obtain readings
prevents large numbers of tests from being conducted
during a single testing session. The average number of
tests conducted during a single testing session is 50
(fifty). |
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4 Reports are issued at the end of the testing day while the technician is still present to explain results, brief maintenance personnel or provide warnings for critical issues uncovered while testing. |
4 Reports must be prepared and mailed
to clients after testing. This can take days, during which
time issues can become critical. |
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5 Sonic confirmation is provided in cases where AC harmonic drives are in close proximity to the test subject, to aid in clarity of testing results at
no additional fee. |
5 There are no provisions for Sonic
Confirmation where AC Harmonic drives are in close
proximity to the test subject. AC harmonic drive testing
would have to be scheduled (for an additional fee). |
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6 All lubrication is accomplished by the technician while testing. The amount of required lubrication is determined by the computed results (not by the technician). Verifying tests are retaken after lubrication to determine its effectiveness in restoring bearing condition. |
6 Vibration Technicians do not add
lubrication to any test point. Instead the technician will
schedule a service call (for an additional fee) to have
lubrication added to any test point. |
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7 PCT Technicians are certified in DC motor maintenance. DC motor maintenance is performed at
no additional fee. |
7 Vibration Technicians do not perform
any DC motor maintenance when defects such as brush
arching are detected. If correctly detected, a service
call will be scheduled (for an additional fee) to perform
DC motor maintenance. |
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8 Motor alignment is checked at no additional fee. Motor alignment checks are accomplished while the motor is running, to prevent production interruptions. |
8 Vibration Analysis cannot be used to
check motor alignment. There are no provisions in the
software. Instead, a service call can be scheduled to
check motor alignment for an additional fee. |
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9 Samples of lubricants are taken and lab tested for type and level of contamination and a report is issued. This may be conducted during every testing session at
no additional fee. |
9 Vibration Analysis cannot detect
contamination levels or types in the lubrication of a test
point. Samples can be taken and Lab Testing can be
performed (for an additional fee). |
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10 Side frame alignment and Roll Parallel are automatically checked at
no additional fee. |
10 Vibration Analysis cannot be used to
check machine alignment or Roll Parallel. |
