10 Signs Your Servo drive needs Repair service

When is the right time to call the service engineer for my servo drive service?  Is there something unusual about the servo drive?  Is that a problem?  These are some of the questions that haunt any user of servo drives.  Instead of running to the service provider every now and then on false alarms, it would a good idea to look for the following signs or symptoms that indicate when it is time to call the service personnel.  Ideally, the following are the 10 probably most important signs that tells your servo drive requires repair or at least some sort of overhauling.

1. Unusual Noise

One of the most easily identified and first sign of faulty equipment is the emanation of unusual noise from the drive.  The noise can be in the form of usual sound at a higher decibel level or some new kind of sound that was not heard previously.  Any unusual sound means that the bearings or the keyway have worn out or there is some problem with the fans and/or shaft.

2. Requires more power

When the servo drives draws more power or high amps, it means there is an issue with the internal assembly/component.  It may be a winding failure or may even be that the servo drive is close to complete failure.  In such an event, it is necessary to call the servo drive service, immediately

3. General symptoms with underlying issues

You should always be wary of any heat issues, thermal defects, excess current/voltage drawal and alarms.  These are some of the indicators to an impending fault.

4. Improper Heatsink functioning leading to increase in temperature

Heat sinks absorb heat away from the servo drive.  When it becomes dirty or cannot perform to the optimum level for any reason, the equipment is bound to overheat.  Overheating is an issue that will potentially breakdown the equipment and blows up the Insulated Gate Bi-polar Transistor (IGBT)

5. Physical Damage

Physical damage to equipment can occur anywhere.  From reckless handling by a casual employee to handling while in transit, there may be several internal and external factors can cause physical damage.  No one would like to have a damaged servo drive in their machinery line-up.  It is therefore essential to thoroughly inspect and test the servo drive before running the machinery, else a small issue will lead to large scale equipment damage.

6. Accumulation of oil and dust

Accumulation dust such as oil, coolant and other contaminants can severely impact the servo drive performance.  If the equipment is dirty on the outer, it is likely that the inner is also dirty.  Such contamination can cause overheating and severely damage the servo drive.

7.  Be wary of short circuit

Coolant is meant to cool down the machinery.  The excess coolant when runs down the cables and gets accumulated can cause deterioration in the insulation.  Exposed wires results in short circuit, which can damage the equipment.  It is always necessary to check the cables frequently for any signs of short circuit or improper and worn-out insulation.

8. Overusing and using above the rated capacity

The servo drives are meant to run at a certain rated capacity.  If your equipment is made to run over and above the rated capacity for long duration, then the equipment is bound to fail.

9. Cooling Fan issues and high temperature

We have already seen about overheating issues and the need to maintain optimal temperature.  Cooling fans , like heat sinks are meant to keep the temperature down.  If they lose their efficiency over time due to reasons such as dust, irregular voltage etc, the equipment may get heated up.  Some servo drives have sensors to detect the functioning of cooling fans and stop when the fan stops.  In other equipment, the fan operations should be constantly monitored to guard the servo drive against overheating.

10. Lack of maintenance schedule

Preventive maintenance is an important component in the servo drive service to keep the servo drives in full fettle.  In preventive maintenance, the service engineer checks the servo drive for proper working condition and looks for any impending faults.  The technician looks for any unusual noise, heating issues and any other signs of wear and tear.  Such preventive maintenance at fixed intervals ensures that your equipment is always in good condition.  In cases where there is no preventive maintenance, the services of maintenance people should be utilized atleast once a year.

With preventative maintenance, all the contaminated and damaged components in your servo equipment will be replaced. Your servo equipment will undergo thorough cleaning and testing, so that the equipment works and functions like new one.

For more details and information and break-down assistance email: albert@accuratejw.com   or call +91 9629953116

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