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| Predictive maintenance is maintenance directed by the condition of the machine... |
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| It is the most promising approach to maintenance and overcomes the disadvantages of the predictive maintenance (PdM) approach based on the operating hours or operating cycles. Detection and diagnosis of equipment problems while a machine is on-line is the most desirable way to maintain a machine. |
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| In industrial applications, preventive maintenance (PM) can be quite effective in reducing the number of maintenance outages for such things as routine bearing changes every 4 months. The cost of the part is insignificant when compared to the value of the production that is lost due to a work stoppage. If the value of that machine’s production is $500.00 / hour, each time a bearing is changed it costs $1,500 - $2,000. The elimination of one or two of these bearing changes is a significant savings, even when factoring in the cost of monitoring at about $500.00 / year. |
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| If a problem with a machine can be detected early, they are generally minor and the machine operations are not affected. If the problems can be diagnosed while the machine is in operation, repairs can be scheduled for a convenient time along with determining the parts, manpower and tools needed.
As a result, the extent of damage to a machine is reduced, and repairs are minor. Since maintenance is done at the inception of a problem, the downtime of the machine is also minimal.
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| Equipment monitoring continues until readings are such that a failure is predicted, and arrangements are made to replace the part that is wearing out before the predicted failure time, thereby getting the maximum useful life from the component and reducing the number of machine outages for maintenance. |
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