As an inspection of pump or the like before delivery, visual checking by vibration meter, hearing test by stethoscopic probe and sensory test depending on human senses are popular. The VC-2100 helps to perform steady and efficient automatic inspection according to the numerical values. The VC-2100 also enables to make OK/NG determination by overall vibration values of pump as well as inspection of the wrong assembly of internal bearing.

The VC-2100 vibration comparator can make OK/NG determination by overall vibration value of motor as well as detecting the problem of internal bearing by specifying and taking measures of the frequency band which leads to the abnormality. The VC-2100 enables automatic inspection of products to ensure consistent quality by replacing the sensory test (especially for the hearing test) by operator.

As an inspection of abnormal sound from compressor, hearing test by operator is popular. You could choose another method using sound level meter etc. because it is an inspection by sound, but it requires enough space and much cost for anechoic box in order to reduce the influence of the back ground noise. As an alternative to these methods, the inspection which is focused on the vibration is performed. Processing the band-limited frequency allows the detection of abnormal sound and automatic determination.

The above example shows how to detect the damages (deformation, flaws) to resin gear teeth and foreign objects trapped inside the audio and visual product. This system using the VC-2100 vibration comparator allows quantification of the abnormalities and more reliable and effective automatic inspection. Also it ensures that all products are inspected for consistent quality on production line.

As an inspection whether there is nick or not on the gear box, sensory test by operator (touching with hand, hearing the difference with stethoscopic probe) is popular. This way of inspection cannot avoid human-error and variation in quality. The determination by quantitative value is necessary in order to improve the quality and stable supply of product. The VC-3100 can detect whether there is nick or not on the product and make determination by quantitative value.

This example shows how to detect the nick on a gear using the VC-3100 vibration comparator. OK/NG determination is made by the difference of vibration values. You can take numeral control while checking the vibration sound through headphones.

An abnormal sound inspection is one of the inspections performed before an engine is delivered. As the abnormal sound, there are versatile causes; unbalance of component parts, electrical noise or knocking phenomenon and so on. In this example, the VC-3100 enables not only detection of vibration by band pass filter and quantitative determination by level determination but also hearing check with headphones.

As an abnormal sound when you turn a steering wheel, the noise from steering pump or the vibration of parts friction is one of the possible causes. For an inspection before delivery, the operator makes determination to hear the generated sound. This example shows how to detect the abnormal sound from vibration with the VC-3100 vibration comparator by mounting the sensor on the measurement object. The VC-3100 enables the detection of vibration which you want by band pass filter and quantitative determination by level determination.

An abnormal sound from an actuator for the door mirror might be caused a deformation or missing of the resin gear teeth, grease with foreign material or motor itself. In this example, the VC-3100 vibration comparator detects the abnormality from vibration by mounting the sensor on the measurement object. The VC-3100 achieves quantitative determination than sensory test and greatly helps to improve the product in quality.

The vibration from a laundry machine greatly affects the product value. For an inspection of vibration, they use equipments such as sensor or vibration meter but the determination is made by operator with visual check. In this example, the abnormal sound is detected from vibration with the VC-2100 by mounting sensor on the measurement object (attachable/removable by using magnetic base). Moreover, the VC-0251 integrating function (option) enables direct reading of the amplitude value and automatic determination.

In this example, the VC-2100 vibration comparator detects the vibration by mounting a sensor on a measurement object (attachable/removable magnetic) for an operation check of pressure adjustment valve in a rice cooker. In a conventional inspection method, the operator has to listen carefully the abnormality from operated sound of pressure adjustment value. The determination by vibration value reduces the strain on ears of operator and the time for inspection process. The OK/NG determination is made by the deference of vibration value. The control by value and checking of vibration sound by headphones can be performed at the same time.

Cracks on pressed products are usually inspected with visual checking by operators after press working. As it is an inspection after press working, once finding a defect means that there may be a dozen of NG products. Moreover, since huge volumes of visual checking waste a lot of labors and time, that might cause overlook of NG product. Therefore the VC-3100 detects abnormal vibration when cracks occur and make OK/NG determination, it improves working efficiency and prevents cracked products from being brought out to next process.

Abnormal sound from camcorder or digital camera might be caused from a damage of a built-in motor or foreign material, or an operation section etc. In an inspection of products before delivery, operators actually inspect abnormal sound by hearing check.
In this example, a sensor is mounted on a measurement object and the VC-3100 vibration comparator detects abnormal sound by vibration.
The VC-3100 can capture and make determination up to four kinds (standard three bands + optional one band) of abnormal phenomena (The four kinds of determinations can be made simultaneously.).

Sound generated from internal electronic printed wiring board or speaker is one of the abnormal sounds from a plasma display. This example shows how to capture and make determination by the vibration which is transmitted from a frame. It is very important to choose suitable accelerometer depending on the loudness of signal (abnormal sound) and to detect signal (abnormal sound) assuredly through band pass filter.

At an inspection of bearing before delivery, scratch, foreign material and rattling from inside of bearing by bad installation are inspected.
Two VC-3100 vibration comparators catch the vibration conducted through bearing frame and make determination by using two accelerometers.
The accelerometers are mounted with being shifted at 90 degrees on a bearing. The VC-3100 can detect smaller scratch assuredly by measuring crest factor value in addition to peak and rms values. Also crest factor count function enables determination of scratch or foreign material.

In most of inspections of small fan before delivery, operators perform sensory tests. Inspections of rattling or abnormal sound etc. at rated speed depend on senses of operators. Recent years, shifting production to overseas requires quantitative determination for stable products in quality.
In this example, the VC-3100 and accelerometers detect rattling or abnormal sound and make level determination by mounting sensors on a fan at radial and thrust directions (magnetic attachable/removal).

When abnormal vibration is generated during knocking test or endurance test of engine, the operation must be stopped. In particular, abnormal vibration in unattended operation or unexpected abnormality might cause serious damage of system etc. so that monitoring vibration is necessary to avoid that kind of accident. This application enables control of machinery by constantly monitoring vibration in unattended operation. For example, it brings an emergency stop of operation and outputs NG signal when abnormal vibration is generated.

An endurance test of bearing is performed by rotating it over long time under being loaded. Since most of tests are performed in unattended operation, abnormality of bearing might not be realized and it can damage the tester. In this example, the VC-3100 vibration comparator detects abnormal vibration. The VC-3100 can make determination (simultaneous determination of four bands) by capturing up to maximum of four abnormal phenomena. This application enables control of machinery such as an emergency stop by constantly monitoring vibration from bearing and outputs NG signal when abnormal vibration is generated.

For a transmission, endurance test is necessary because of its hard usage. The endurance test is performed under high load over long operation. As damage of internal gear or bearing can lead to destruction of tester, abnormality must be detected to stop system urgently. In this example, the VC-3100 vibration comparator detects abnormal vibration by mounting sensor on measurement object. The VC-3100 can make determination (simultaneous determination of four bands) by capturing up to maximum of four abnormal phenomena. This application enables control of machinery such as an emergency stop by constantly monitoring vibration from bearing and outputs NG signal when abnormal vibration is generated.

Abnormal vibration which is generated at the time of gear processing is a main cause of NG product. Causes for generating abnormal vibration include abrasion or missing of gear teeth and abnormality in machinery itself. In this example, the VC-3100 detects and determines abnormal vibration by mounting a sensor on a measurement object. The VC-3100 can monitor abnormality in rotation of first order (rattling of processing machine) or abnormality by damage of gear teeth (high frequency band) with appropriate setup and usage of band pass filter. The VC-3100 greatly helps to reduce labor and improve product quality by prevention of NG product or its outflow as well as facilitating total inspection.

Liquid crystal cell is produced with delicate work from forming polarity to injection of liquid crystal. Vibration during a production process affects on product quality. Though yield ratio greatly affects on production cost, you cannot know performance of product until you actually power it on at the time of final inspection in many cases. In this example, the VC-3100 detects and determines by monitoring vibration during production process. This application helps to prevent NG product or its outflow as well as stable production in quality.

When powder is shifted through a sieve, the sieve vibrates at smaller amplitude if it is clogged. However, a sieve vibrates at larger amplitude if there is any abnormality in a way of installing equipment or motor. In this example, the VC-2100 detects and determines abnormal vibration by mounting sensor (screw fixing) on a measurement object sieve.

At semiconductor plant, abnormal vibration during carrying conveyance between processes or in-process leads to damage of wafer in the conveyance. This application including the VC-2100 monitors vibration which is generated during carrying a conveyance by mounting a sensor (magnetic attachable/removal) on a measurement object conveyance and enables control such as stopping the carrying. It also can be used for monitoring of vibration other than carrying such as detecting crack of wafer in each process.

Diffuser is operated for 24 hours and used very hard. In particular, fin-breaking will lead to a serious accident. In this example, the VC-3100 monitors constantly by mounting a sensor on a measurement object (magnetic attachable/removal). It is helpful for predictive maintenance such as prevention from an accident caused for wear by detecting an abnormal vibration earlier. This application is promising on an emergency situation including unexpected fin-breaking.

To evaluate tolerance of material against torsion, torsional tester is used. This example shows how to detect cracks on material by vibration. The vibration sensor is mounted (magnetic attachable/removal) on around a bearing of chuck (stationary side). The VC-3100 can make determination (simultaneous determination of four bands) by capturing up to four abnormal phenomena (standard three bands + optional one band). The difference of frequency band between vibration in rotor rotation and vibration from cracked material can be used for monitoring of vibration by using the band changeable processing function of the VC-3100.

This example shows a constant monitoring of motor in equipment. The VC-3100 vibration comparator detects abnormality from vibration by mounting sensor (magnetic attachable/removal) on a measurement object. The VC-3100 can make determination (simultaneous determination of four bands) by capturing up to maximum of four abnormal phenomena (standard three bands + optional one band). Constant monitoring with the VC-3100 makes accurate determination of a time for parts replacement and contributes to save operation time. It also has a significant role as an accident measures by unexpected accident.

This example shows how to perform constant monitoring of rolling mill. Periodical control by operator cannot avoid unexpected abnormality. This application helps to prevent that kind of accident by detecting abnormality immediately. They can be set up externally and used in small/medium monitoring system. When there are nine measurement objects, nine VC-2100 units detect abnormality from vibration by mounting sensor (magntic attachable/removal) on each measurement object.

When a water-wheel, which is a heart of hydropower generation, is broken, it causes decrease in power generation efficiency as well as breakage in other parts. Early detection of abnormality and maintenance are important. As abrasion or breakage appears in abnormal vibration, monitoring vibration is an effective way to detect abnormality. The VC-3100 vibration comparator can monitor vibration periodically, detect abnormal vibration and output alarm signal. This application is helpful for predictive maintenance such as prevention of an accident.

Deterioration of bearing which supports a main shaft in working machine greatly affects on processing accuracy of parts. In this example, the VC-3100 vibration comparator constantly monitors vibration from a main shaft and detects abnormality in bearing as soon as it occurs. Abnormality is monitored at scheduled time of idle running in case it may not be detected successfully due to an influence of cutting vibration in processing.

This example shows how to monitor a drill of machine tool constantly to detect defect (breakage or wear etc.). This application can reduce defective products and improve product quality. The VC-2100 monitors constantly and detects abnormality by a sensor (magnetic attachable/removal) mounted on a measurement object as soon as it occurs.

Wear of a grinding wheel in a polishing machine is one of the reasons to reduce accuracy of product finish. In this example, The VC-2100 monitors constantly and detects abnormal vibration to find imbalance caused from wear by a sensor (magnetic attachable/removal) mounted on a measurement object. This application achieves a reduction of maintenance cost and improves product quality.

If a cutter blade is broken, all textile of the lot should be thrown away because the broken cutter blade may be remained in a textile. Detecting a breakage of cutter blade is indispensable to prevent such a large loss. Today, metal detector or the like monitors whether a broken edge is mixed in textile or not. In this example, the VC-3100 monitors constantly and detects abnormal vibration to find breakage of a cutter blade by a sensor mounted on a measurement object (magnet attachable/removal). This application gives an alert with signal tower when it detects the breakage and greatly helps to reduce maintenance cost.

In semiconductor plant, introduction of an advanced equipment is necessary for improving productivity and manufacturing new products. The equipment is so precise that the installation environment must be considered. The VR-6100 helps to find a way of installation or countermeasures to reduce vibration level by measuring floor vibration before a machine installation.

Vibration from a large press machine often causes adverse affect on other production machines. For that reason, it is necessary to take countermeasures to reduce vibration of foundation. This example shows how to measure floor vibration using the VR-6100 to figure out how much of vibration is generated.

Traffic noise and vibration at arterial highway is greatly affected on lives of neighborhood. Persistent vibration and track noise often made at midnight would disturb their sleep. In this example, the VR-6100 measures vibration at the time of track going by. This method is useful for vibration insulation countermeasures and so on.

The worth and performance of a vibration insulating bench-top, used with a precision machinery, depend on how much vibration can be removed with it. In this example, the VR-6100 is used to compare vibration on a floor and a vibration insulating bench-top, and evaluate its performance including insulation effect.

Driving tests play a significant roll for evaluating the performance about every vehicle such as a track or a specialized vehicle. Recent years, private houses are often built near a test course and manufacturer should take the most careful attention for vibration insulation countermeasures. The VR-6100 grasps how much vibration is transmitted at the time of driving test to help for vibration insulation countermeasures. The vibration of the frequency band which is not prescribed in the vibration pollution measurement is unwatched and may cause the fluttering vibration of glass window.

Traffic noise and vibration at the highway greatly affect on lives of neighborhood. Persistent vibration and track noise often made at midnight may disturb their sleeps. In this example, the VR-6100 measures vibration when a track passing a road. This method is useful for vibration insulation countermeasures etc. In this example, recording and replaying a vibration object as a video in synchronization with the vibration data allow visual checking of what causes a rapid change in vibration at unattended and automatic vibration measurement.