Vibration comparator
VC-2200
For customers who want to start monitoring and diagnosing equipment abnormalities and pass/fail judgment of products.
Do you have any of these problems?
■ Equipment Diagnosis
Judgments vary depending on the five senses used for inspection.
Failure to notice equipment malfunctions leads to breakdowns and production stoppages.
■ pass/fail judgment
Auditory test results vary.
Anomalies cannot be captured numerically.
The VC-2200/VC-3200 vibration comparators are high-performance signal processors that take output signals from Accelerometer as input and can check vibration levels, detect machine anomalies, and determine vibration levels. Their simultaneous 2-band (VC-2200) / 3-band (VC-3200) digital signal processing capabilities enable detection, measurement, and judgment for each type of anomaly.
* The photo shows the main unit (VC-2200/VC-3200), Accelerometer (NP-3331N20), cable (NP-0143), and magnetic base (NP-0100).
* Accelerometer (NP-3331N20), cable (NP-0143), and magnetic base (NP-0100) are sold separately.
We will use vibration to pass/fail judgment of the bearings.
The bearing is rotated, and the vibration value at that time is used for assessment. By focusing on the frequency band, the nature of the bearing defect (scratches, foreign matter contamination, unbalance, etc.) can also be identified. In addition to Accelerometer, velocity sensors are also used. When using a velocity sensor, the VC-2200/VC-3200 is switched to external signal input.
Detection of abnormal runout in the spindle of a machine tool
Spindle runout in machine tools significantly affects the finishing accuracy of workpieces. Ideally, spindle runout should be measured with a displacement gauge, but environmental conditions, handling requirements, and cost considerations make its use difficult. The VC-2200/VC-3200 detects spindle abnormalities through vibration, making it robust against environmental conditions and allowing for continuous monitoring. As spindle runout increases, so does the vibration value; therefore, spindle runout abnormalities can be detected by monitoring the vibration value.
It automatically detects and identifies abnormalities in bearings, gears, and other components.
Traditional equipment diagnostics required significant labor, as workers periodically measured vibrations in bearing boxes and other components, and determined maintenance timing for bearings and other parts based on changes in vibration values. Furthermore, sudden malfunctions could lead to accidents such as equipment damage. A vibration comparator, however, continuously monitors equipment vibrations on behalf of workers, reducing labor costs and preventing equipment damage in the event of an anomaly. Additionally, the ability to select frequency bands allows for monitoring that more closely resembles a diagnostic assessment.
Detects breakage of drills, cutting tools, etc., in machine tools operating unmanned.
In large-scale parts processing using NC machines and other automated systems, most operations are automated. If a drill bit breaks during operation, the processed part becomes defective, requiring reprocessing, or in the worst case, being discarded. The VC-2200/VC-3200 vibration comparator detects vibrations caused by bit breakage and stops the machine, minimizing the production of defective parts. Furthermore, since bit wear affects processing accuracy, monitoring changes in vibration values due to wear helps improve processing accuracy.
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VC-2200
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VC-3200
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Measurement Mode
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Switch selection
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RMS value:
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RMS value
Time constant:
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RMS value Time constant:
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Peak value: PEAK
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Peak value of the absolute value of the time waveform
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Peak/Maximum RMS
Factor: PRF
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none
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Peak value ÷ Maximum effective value
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Equal Hold
MAX Hold
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Hold the maximum effective value.
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Peak Hold
: PEAK Hold
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Hold the maximum value of the peak value
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Peak maximum effective value
Factor Hold
: PRF HOLD
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none
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Peak/Maximum RMS Factor
Hold the maximum value
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Power Average: PAVG
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none
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 Average time: OFF
100 ms 200 ms 300 ms 500 ms 1 s 2 s 3 s 5 s 10 s 20 s Selectable *When power average is selected, other measurement modes cannot be selected. |
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| Other average functions Tact Max Value: TAVG |
none | Displaying the maximum value over a 500 ms period. Average number of times: OFF/4/8/16/32/64 times Selectable |
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