Precision Electric motor repair technician balancing a rotor

Precision Electric Industrial Electronics & VFD Repair Experts

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Why Reliable Precision Electric Industrial Electronics Matter

However, when a production line stalls, downtime costs rise by the minute. Therefore, industrial leaders look for partners who can respond immediately, diagnose accurately, and restore power fast. Precision Electric Industrial Electronics, a family‑owned U.S. company, has delivered that peace of mind for more than forty years. Moreover, the engineer‑led team provides nationwide distribution of drives, motors, and controls alongside factory‑level repairs, so customers avoid juggling multiple vendors.

Because decision makers still need clear data, this guide distills the latest research on variable frequency drive faults, motor failures, and power quality issues. In addition, it outlines proven counter‑measures, recommended products, and success metrics drawn from real customer stories. Consequently, you will learn how to prevent the most common electrical breakdowns, how to choose the right retrofit path, and how to justify spending with hard numbers.

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Eaton power board failure: the main reason Eaton drives quit working

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Eaton power board failure is a common problem among Eaton drive users. Power board damage is the cause of failure in most non-functional Eaton drives. Power board failure is usually caused from either Eaton drives reaching the end of their life cycle, the incorrect drive enclosure was being used, or, neglecting preventative maintenance of Eaton equipment. If the power board damage is excessive, an entire board will need to be replaced. Eaton takes a long time to diagnose and repair equipment. Most of the time Eaton will hold onto a manufacturer’s drive for months and then tell them that the drive must be replaced because “it isn’t worth repair”. Precision Electric has repaired many Eaton power boards and Eaton drives that Eaton deemed “not worth repair”.

Although they offer drive repair, most Eaton distributors don’t even repair drives themselves. These Eaton distributors outsource Eaton drive repair to third parties because they don’t have the equipment, documentation, knowledge, or technical staff to perform Eaton drive repair. Going through an Eaton distributor who is outsourcing the repair to a third party is cost prohibited and time-consuming. It’s best to go directly to an Eaton repair center, such as Precision Electric. Precision Electric is an Eaton repair center and Precision Electric performs all Eaton power board and Eaton drive repair in house. Precision Electric also offers immediate 24/7 emergency repair for breakdowns.

The Eaton power board failure repair process should always be taken with extreme caution. Eaton power board repair should only be performed by technicians who have required training and experience to work with electrical equipment. Troubleshooting and repairing an Eaton power board is time consuming and tedious because every Eaton power board can be unique depending upon the Eaton drive functions and capabilities; But, the overall structure of troubleshooting and repairing always remains the same. The ultimate goal when repairing an Eaton power board is to diagnose the cause of failure, repair of the power board, reassembly of drive module; Then, the appropriate steps to avoid repeat problems is communicated to the customer. Lastly, re-commission the drive with its corresponding equipment.

Precision Electric performs all Eaton power board failure repairs in house. In house repair ensures efficient turnaround time, better repair cost, and less handling of Eaton equipment. Precision Electric also offers Eaton emergency repair services for customers who are broke down and require immediate repair services.

To learn more about Eaton drives, visit the Eaton Website. Contact Precision Electric for Eaton drive repair and replacement. Precision Electric can be reached by phone at 574-256-1000 or by email at [email protected]

 

 

 

 

Allen Bradley Servo Motor Repair: an Asset For Manufacturers

Allen Bradley Servo Motor Repair: an Asset for Manufacturers

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Allen Bradley servo motor repair is less expensive than Allen Bradley servo motor replacement. Only Trained technicians should perform Allen Bradley servo motor repair. Technicians undergo unique testing procedures on Allen Bradley servo motors that are dependent upon their model, features, operations, software, and prints. Allen Bradley servo motor repair should initially be inspected for cosmetic damage. Taking photos of the servo motor prior to further processing is suggested. Allen Bradley servo motor repair requires unique software that allows a technician the ability to communicate with the Allen Bradley hardware.

Servo Motor nameplate data and preventative maintenance info should be collected by the repair technician and safely stored for future reference. Once these initial steps are complete, the servo motor should be meter tested before test running on a control panel; Meter testing prevents further damage to parts, winding, and insulation. The servo motor should then be connected to a test stand to check EMF (electromagnetic frequency), encoder or resolver feedback, and commutation alignment; These standard tests are to ensure functionality once the motor is installed for production. Servo motors also need to be tested with an oscilloscope to create an operation print. Once an operation printout is generated, a technician will check for connection issues, magnet failure, winding failure, and perform a 100% component test.

Once the trained technician finishes making all repairs, he or she will reassemble the servo motor for final testing. During the final test, the servo motor is connected to a compatible servo drive that is powered from a test panel. This should be done for approximately thirty minutes with and thirty minutes without, a full load. The technician will measure start up current draw and full load current draw, with and without a load, throughout the final test run.  The technician will also perform speed and vibration tests to ensure the servo motor is operating at the manufacturer specifications.  Running the servo motor on a compatible servo drive also ensures complete functionality. Testing the servo motor with a compatible servo drive also allows verification that the servo motor can operate at full voltage and withstand full load amps of motor specifications. If the servo motor tests good and still does not run at peak performance when installed in production, other underlying problems are communicated to the customer and further investigation is necessary.

Repair shops should work closely with all servo motor manufacturers. Working closely with servo motor manufacturers allows for access to servo motor data sheets. Repair technicians use data sheets to ensure that the servo motor performs equal to, or better than, the original manufacturer standards. Most repair shops offering Allen Bradley servo motor repair do not even perform the repair in their facility. Instead, these repair shops outsource the repair to a third party such as Precision Electric. Using a third party repair shop is risky, more expensive, and has a longer lead time than going directly to the repair source. Allen Bradley servo motor repair from Precision Electric includes a 12 month in-service warranty; The in-service warranty encourages customers to repair all failed equipment so the equipment is ready for install whenever spare equipment fails while in service.

To learn more about Allen Bradley servo motors, visit the Allen Bradley Website. For Allen Bradley servo motor repair and replacement quotes, contact Precision Electric.

Indramat Drive Repair

Indramat Drive Repair: Reducing Cost and Downtime for Manufacturers

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Indramat drive repair is less expensive and can take less time than ordering a new Indramat drive. Indramat will sometimes recommend replacing failed drives instead of repairing them but Indramat drive replacement is expensive; And in most cases, the recommendation made by Indramat is the most convenient  and profitable option for Indramat. Indramat obsolete and out-of-stock drives that fail can cost a manufacturer thousands of dollars in production loss while the failed equipment is being replaced or repaired. In some cases, the production loss could turn into an inability to fill customer orders and ultimately, can end with the loss of a customer.

The Indramat Drive Repair Process

Begins with checking the motor and drive terminal connections. This is a crucial and simple step that many people miss or do incorrectly during an Indramat drive repair. Heat cycles and mechanical vibration can lead to sub-standard connections, as can standard preventative maintenance practices. Reusing torque screws is not a good Idea, and further tightening an already tight connection, can ruin the connection. Bad connections eventually lead to arcing. Arcing at the drive input terminal can result in nuisance over voltage faults, clearing of input fuses, or damage to protective components. Arcing at the drive output terminal could result in over-current faults or even damage to the power components. Loose connections can cause erratic operation. For example, a loose START/STOP signal wire can cause uncontrollable drive starting and stopping. A loose speed reference wire can cause the drive speed to fluctuate, resulting in scrap, machine damage, or personnel injury.

Conduct Diode and IGBT Tests
There are a number of methods to test the input and output power sections during an Indramat drive repair, and this step is done prior to applying power to the drive unit. If for any reason there is a short on the input side or output side of the drive, further damage can be caused to the unit if power is applied to it. For this reason, Precision Electric uses meters to safely test the input and output power sections of the drive, prior to applying power to the actual unit. If a short is found, the unit can be disassembled and the cause of the short can be diagnosed and quoted for repair. If the Indramat drive repair is too costly, then an Indramat or equivalent product replacement is offered to the customer.

Power Up Unit
If the input and output power sections test healthy during the Indramat drive repair process, Precision Electric will power the unit and perform amp reading and output frequency tests. Precision Electric slowly increases the power voltage to the Indramat drive until the rated input voltage of the drive is reached. Depending on whether or not the Indramat drive provides a display will determine what further action will be taken. If display is unavailable, disassembly and diagnosis of the internal power supply of the control section of the drive is necessary to further evaluate cause of failure and establish cost and lead time for the Indramat drive repair.

Run A Motor
If the previous three tests have passed during an Indramat drive repair process, Precision Electric will run a basic jog function of the drive with a simple template program. Often when a drive comes into our facility, we make sure to backup all existing programs stored in the drive prior to inputting a template program and running a test procedure. This ensures that we have a backup copy of the program. The best method for backing up depends on the brand of drive, but after it has been backed up, we either reset the Indramat drive to factory defaults through the keypad and recommission a basic start, stop and jog application, or, closed loop if an encoder is present. If the motor will not run, it will be necessary to check the output voltages and current ratings going to the motor to see if the drive is functioning properly to rotate the motor.

Routine Maintenance & Safety
Most Indramat drive failure can be avoided with routine preventative maintenance. Indramat drive repair cost and lead times can also be reduced with preventative maintenance. Indramat drive repair can be expensive and cost manufacturers production throughput loss during the repair process. Most manufacturers keep spare drives in stock to prevent production loss while failed equipment is in process of being repaired.

Indramat drive repair should be taken with extreme caution and only be performed by technicians who have required training and experience to work with electrical equipment. Precision Electric strongly recommends to consult an expert in the field when repairing all industrial electrical equipment. Many drive controllers have an internal DC bus that retains a charge after power has been cut to the drive; As a result, cut power does not mean a failed drive is safe to work with. Technicians working with Indramat drives and other electrical equipment must always take extra precautions to ensure proper safety measures are taken to prevent injury or death.

Where Should I Send My Repair?
A lot of companies who offer Indramat drive repair, don’t even have the knowledge, staff, or proper testing equipment to perform the repair themselves. These “repair companies” who offer drive repair just outsource the repair to a third party, such as Precision Electric. Precision Electric receives Indramat drive repairs every day from “repair companies” who offer Indramat drive repair. These “repair companies” mark up the cost to their customer and add extra time to the repair by handling the transaction. Going to these third party “repair companies” for repair services is costly, timely, and unnecessary. The most economical solution for Indramat drive repair is using a repair company who actually performs the repair. Avoid third parties and go straight to Precision Electric or someone else that is trustworthy and performs repair in-house. Precision Electric performs all Indramat drive repair in house.

For Indramat drive specifications and documentation, visit the Indramat Website. For Indramat drive repair and replacement quotes, contact Precision Electric.

Yaskawa Servo Motor Repair

Yaskawa Servo Motor Repair

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Yaskawa servo motor repair is less expensive than Yaskawa servo motor replacement. Only trained technicians should perform Yaskawa servo motor repair. Trained technicians undergo unique testing procedures on Yaskawa servo motors that are dependent to each servo motors’ model, features, operations, and prints. Trained technicians will have the ability to perform these procedures successfully and safely. The first step of Yaskawa servo motor repair is the inspection of equipment for cosmetic damage or missing parts. Trained technicians take this step to ensure a successful repair is possible before proceeding further. Taking digital photos of the servo motor prior to further processing is also suggested.

Servo Motor nameplate data and preventative maintenance info should be collected by the technician and safely stored for future reference. Once these initial steps are complete, the servo motor should be meter tested before test running on a control panel; Meter testing prevents further damage to parts, motor winding, and insulation. The servo motor should then be connected to a test panel to check EMF (electromagnetic frequency), encoder or resolver feedback, and commutation alignment; These standard tests are to ensure functionality, once the motor is installed for production. Servo motors also need to be tested with an oscilloscope to create an operation print. Once an operation printout is generated, a technician will check for connection issues, magnet failure, and winding failure. Once this is complete, the trained technician will perform a 100% component test to the servo motor. Once these tests are finished, the cost to repair and replace parts is estimated and labor is also determined. If the cost to repair the servo motor exceeds 50-60% of the cost to replace, the customer is offered a replacement quote. Otherwise, the technician can create a repair quote with lead time and communicate all pertinent information to the customer. Once the customer approves the repair quote, the technician will proceed with the repair.

Now, the technician will have an in-house machinist perform shaft and bearing housing repairs that are damaged. Old bearings are removed and saved for future reference. The technician will clean up and make repairs to all other damaged parts; replacement parts that cannot be repaired are ordered at this time. Finally, the technician will install new bearings and reassemble the servo motor for final testing. During the final test procedure, technicians should connect the motor to an inverter, with and without a load. Running the servo motor on an inverter ensures complete functionality; Running the servo motor with a load will ensure full functionality once it is running in production. Testing with an inverter also allows verification that the servo can operate at full voltage and withstand full load amps of motor specifications. Yaskawa servo motor repair shops should work closely with all servo motor manufacturers. Working closely with servo motor manufacturers allows repair shops accessibility to servo motor data sheets, parts, and other valuable information. Repair technicians use data sheets to ensure that the servo motor performs equal to or better than, the original manufacturer standards.

Most Yaskawa servo motor repair shops offering servo motor repair don’t perform the repair themselves. These repair shops actually outsource the repair to a third party and then mark up the repair price to their customer. Outsourcing the servo motor repair is not a good idea. Outsourcing the repair is done when the repair shop does not have the ability or training to perform the servo motor repair. Repair shops use third party repair shops such as Precision Electric, because Precision Electric has been in the manufacturing industry since 1984 and their competent staff have the skills and training needed to perform these services. Most customers don’t find out that their repair shop is outsourcing the repair to Precision Electric until they contact the repair center asking technical questions. When this happens, the repair center is unable to communicate or provide technical information to the customer; and the repair center has their customer call Precision Electric for the answers they need.

This process ends up costing the manufacturer more money, time, and additional problems with their equipment. Manufacturers and other servo motor users should send their Yaskawa servo motor to the company that is actually performing the repair. This will save money, time and this will ensure a professional and high quality repair. Yaskawa servo motor repair from Precision Electric is performed in house and includes a 12 month in-service warranty. For Yaskawa servo motor repair and replacement quotes, contact Precision Electric at 574-256-1000. Or, initiate your servo motor repair here and send it to Precision Electric today.

fanuc-servo-motor-repair-3

Fanuc Servo Motor Repair, Short Summary Of Our Procedure

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Fanuc servo motor repair is less expensive than Fanuc servo motor replacement. Only trained technicians should perform Fanuc servo motor repair. Trained technicians undergo unique testing procedures on Fanuc servo motors that are dependent to each servo motors’ model, features, operations, and prints. Trained technicians will have the ability to perform these procedures successfully. The first step of Fanuc servo motor repair is the inspection of equipment for cosmetic damage or missing parts. Trained technicians take this step to ensure a successful repair is possible before proceeding further. Taking digital photos of the servo motor prior to further processing is also suggested.

Servo Motor nameplate data and preventative maintenance info should be collected by the technician and safely stored for future reference. Once these initial steps are complete, the servo motor should be meter tested before test running on a control panel; Meter testing prevents further damage to parts, motor winding, and insulation. The servo motor should then be connected to a test stand to check EMF (electromagnetic frequency), encoder or resolver feedback, and commutation alignment; These standard tests are to ensure functionality once the motor is installed for production. Servo motors also need to be tested with an oscilloscope to create an operation print. Once an operation printout is generated, a technician will check for connection issues, magnet failure, and winding failure. Once this is complete, the trained technician will perform a 100% component test to the servo motor.

Once these steps are complete, the technician will make repairs to applicable parts and order replacement parts that cannot be repaired. Finally, the technician will reassemble the servo motor for final testing. During the final test procedure, technicians should connect the motor to an inverter, with and without a load. Running the servo motor on an inverter ensures complete functionality. Testing with an inverter also allows verification that the servo can operate at full voltage and withstand full load amps of motor specifications. Repair shops should work closely with all servo motor manufacturers. Working closely with servo motor manufacturers allows repair shops accessibility to servo motor data sheets, parts, and other valuable information. Repair technicians use data sheets to ensure that the servo motor performs equal to, or better than, the original manufacturer standards.

Most repair shops offering Fanuc servo motor repair do not even perform the repair in their facility. Instead, these repair shops outsource the repair to a third party such as Precision Electric. Most manufacturers don’t know that their repair center isn’t even performing the repair. This process ends up costing the manufacturer more money, time, and additional problems with their equipment. The best option for manufacturers is to send their Fanuc servo motor to the company that’s actually performing the repair. This will save the manufacturer money, time and ensure the best possible repair. Fanuc servo motor repair from Precision Electric is performed in house and includes a 12 month in-service warranty. For Fanuc servo motor repair and replacement quotes, contact Precision Electric at 574-256-1000

Machining a NEW Fan Hub

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Machining a NEW Industrial Fan Hub

Machining & Repairing A New Industrial Fan Hub by Precision Electric. Subscribe to our youtube channel today!

 

ABB Variable Frequency

ABB Variable Frequency Drive Repair, Procedure Summary

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ABB variable frequency drive repair should begin with checking the electric motor connections and drive terminal connections. Motor and drive connections can be missed, installed loosely or wired to the incorrect terminals, so checking all connections is recommended before pulling the drive for a repair evaluation. Heat cycles and mechanical vibration can lead to sub-standard connections. Reusing torque screws is not a good idea, and further tightening an already tight connection can ruin the connection. Bad connections eventually lead to arcing. Arcing at the drive input terminal can result in over voltage faults, clearing of input fuses, or damage to protective components. Arcing at the drive input or output terminals may result in over-current faults or damage to the power components. Loose connections can cause erratic operation. For example, a loose START/STOP signal wire can cause uncontrollable starting and stopping of the motor. A loose speed reference wire can cause the drive speed to fluctuate, resulting in scrap, machine damage, and personnel injury.

 

Diode and IGBT Testing

Prior to applying power during the ABB variable frequency drive repair, the input and output power sections are tested. If there is a short on the input side or output side of the drive, further damage can be caused to the unit if power is applied to it. For this reason, special meters should be used to properly test the input and output power sections of the drive prior to applying power to the drive unit. If a short is found, the drive can be disassembled and the cause of the short can be diagnosed and quoted for repair. If the drive repairs are too costly, drive replacement should be considered.

 

Power Up

If the input and output power sections test healthy during the ABB variable frequency drive repair process, power can be applied to the drive to perform amp reading and output frequency testing. Slowly increasing the power voltage during this step of the drive repairs process is suggested to gather accurate meter readings and to protect the motor. The power voltage is slowly increased on the drive until the rated input voltage of the drive is reached. Depending on whether or not the drive provides a display will determine what further action will be taken. If display is unavailable, disassemble and diagnosis of the internal power supply of the control section of the drive is necessary to further evaluate cause of failure and establish cost and lead time of the drive repairs.

 

Motor Testing

If the previous three tests have passed during the ABB variable frequency drive repair process, a basic JOG / RUN function of the drive can be performed with a simple template program. When a drive comes into our facility, repair techs will backup all existing programs stored in the drive prior to installing a test template program for testing. Backing up the drive program ensures that we have a backup copy of the program to install after the repair is complete. The best method for backing up drive programs will depend on the series and model of drive that’s being repaired. After the drive programs have been backed up, the drive is reset to factory default through the keypad and then recommissioned to a basic START / STOP function of the drive connected to its motor. Closed loop testing will be necessary when an encoder or tachometer is involved. If the motor will not run, the output voltages and motor current ratings are tested to verify that the drive is functioning properly to rotate the motor.

 

Safety Precautions

Manufacturers are encouraged to ensure that their ABB variable frequency drive repair are being performed at the actual site of whoever is offering the service. Drive repairs should be taken with extreme caution and only be performed by technicians who have required training and experience to work with electrical equipment. Precision Electric strongly recommends to consult an expert in the field when repairing all industrial electrical equipment. Many drive controllers have an internal DC bus that retains a charge after power has been cut to the drive, and as a result, electrical current is still present after power is shut down. Technicians performing VFD repairs must always take extra precautions to ensure proper safety measures are taken, or injury or even death may occur.

 

Precision Electric receives ABB variable frequency drive repair everyday from companies who offer drive repair services; those third party repair companies will have Precision Electric perform the repair, and then they will mark up the repair cost to their customers. Going straight to Precision Electric for drive repairs will prevent these added costs and prevent extensive lead times. For ABB variable frequency drive repairs and replacements, contact Precision Electric.

Cutler Hamme

Cutler Hammer VFD Repair

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Cutler Hammer VFD repair should be taken with extreme caution and only be performed by trained technicians. Only experts in the electrical field should repair or troubleshoot industrial electrical equipment. Most drive controllers have an internal DC bus that retains a charge after power has been cut to the drive, and as a result, the power being cut doesn’t mean that the drive is safe to work with. Technicians working with variable frequency drives and other electrical equipment must always take extra precautions to ensure proper safety measures are taken to prevent injury or death.

Variable frequency drives have become a cost efficient way to reduce power costs and increase system efficiency over the past decade. Manufacturers within a wide range of industries are finding more ways to apply Cutler Hammer VFDs to their rotating equipment for improvements in: production, quality control, safety measures, environmental concerns, energy efficiency, and much more. Cutler Hammer VFDs below 10 horsepower typically fail in eight years from initial installation date, and, are more often replaced than repaired. Product replacement is necessary when product repair is cost-prohibited to the customer. Cutler Hammer VFDs above 10 horsepower outlast smaller VFDs by virtue of quality routine repairs. Routine VFD repairs often require consistent replacement of circuit boards and other electrical components.

Cutler Hammer VFD repair is preferred by end users and VFD maintenance departments because Cutler Hammer replacement is more expensive than repair. Most companies who offer Cutler Hammer VFD repair outsource the VFD to third party repair centers, or they send it to Cutler Hammer. Cutler Hammer usually holds onto VFD repair jobs for several weeks before responding to customers. Most of the time Cutler Hammer will tell customers that their VFD is “not worth repair” and they will recommend replacing the VFD with a newer Cutler Hammer product.

Precision Electric offers Cutler Hammer VFD repair and all Cutler Hammer repair jobs are performed in house at Precision Electric. Precision Electric is the “third party” repair center that most companies offering Cutler Hammer VFD repair, send the job to. It is not uncommon for Precision Electric to restore a Cutler Hammer VFD back to its original or better than original condition after Cutler Hammer says the VFD “can’t be repaired / isn’t worth repair”

Contact Precision Electric today for Cutler Hammer VFD repair quotes or Cutler Hammer VFD replacement quotes.

ABB Field Service

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ABB field service should only be performed by ABB-certified engineers. ABB-certified engineers must complete ABB startup training courses to qualify for ABB extended warranties. ABB field service offered by Precision Electric provides professional troubleshooting, diagnosis and repair skills, installation and commissioning services all at the jobs site for manufacturers to optimize drive safety, availability and performance.

ABB field service helps to minimize installation and commissioning time and cost. Manufacturer service needs depend on their operation, life cycle of equipment and business priorities. ABB has identified their customers’ four most common needs and defined service options to satisfy them. It’s imperative to keep ABB drives at peak performance. Operation depends upon the most optimal configuration, set up and maintenance programs. When it comes to important operations, everything needs to be done correctly from the start. From commissioning to spare parts and preventive maintenance, Precision Electric is with the customer through the entire process. Manufacturers need to have all the support to correctly install and run drives efficiently. ABB field service performed by ABB-certified engineers can undertake the entire drive installation and commissioning for the customer. Correctly installed drives are more reliable, and well-commissioned drives lead to energy savings and lower operational costs.

ABB Field Service And Preventive Maintenance

ABB field service and preventative drive maintenance schedule manages the parts replacement at the right time. This regular maintenance keeps costs down, prevents drive repair, and keeps lifetime performance optimal. There are preventive maintenance kits designed to match specific drive types. Highly skilled and trained engineers carry out all annual inspections and component replacements accordingly. Life cycle management is one of the most important aspects in defining ABB field service. ABB field service performed by Precision Electric combines experience and top solutions to extend, analyze and optimize the life cycle of ABB drives. When customers need information on the condition of their equipment and the life cycle of components, Precision Electric provides help in diagnosis and assessment of ABB drives in a modern and easy service.

ABB Field Service And Life Cycle Assessment

ABB field service and life cycle assessment gives manufacturers powerful knowledge to determine exactly where process stands, now and in the future. Reconditioning an ABB drive improves the ABB drive reliability and extends its lifetime. ABB recommends these services at least once in every drive’s lifetime. Reconditioning ABB drives at Precision Electric provides restoration of ABB drives to their original condition and includes a full inspection, thorough cleaning, individual component analysis and replacement, and final testing with and without a load. Every drive reconditioned by Precision Electric is thoroughly tested and comes with a one-year warranty. Control Upgrade services ensures full life cycle services for ABB legacy drives by removing all concerned components and replacing them with upgraded components. Investment costs and process downtime are minimized with an engineered solution in the life cycle assessment process.

For more information or for ABB field service quotes or ABB drive repair and replacement quotes, Contact Precision Electric.

Servo Motor Repairs

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Servo motor repairs are less expensive and quicker than servo motor replacements. Servo motor repairs should be taken with extreme caution and only be performed by technicians who have training and experience to work with electrical equipment. Most companies who offer servo motor repairs do not even perform the repair in their facility; instead, these companies outsource the repair to a third party such as Precision Electric. Precision Electric always receives servo motor repairs from companies who offer servo motor repair services. Third party repair companies take longer to return equipment to their customers and third party repair companies mark up the repair cost to their customers. Precision Electric recommends verifying that the company offering repair services is the company actually repairing the equipment.

Servo motor repairs should always go through an extensive evaluation process to ensure nothing is overlooked. The servo motor should be connected to a test stand to check back emf, encoder or resolver feedback, and commutation alignment to ensure functionality once the motor is installed into productions. Servo motor repairs need to be tested with an oscilloscope and once an operation printout is generated, the technician will check for connection issues, magnet failure, winding failure, and 100% component testing. Servo motor repairs at Precision Electric are initially inspected for cosmetic damage and then they are meter tested before test running on a control panel. Most servo motor repairs have unique testing procedures dependent upon the manufacturer operations and prints, but the general process follows standard test procedures.

It’s also necessary for Precision Electric to work closely with all servo motor manufacturers. Working closely with servo motor manufacturers allows Precision Electric access to technical data sheets that are needed to ensure that the the servo motor performs optimally prior to shipping the repaired unit back to customer.

Precision Electric standard servo motor repairs are subject to:

  • An inspection of all electrical and mechanical servo motor parts.
  • Re-magnetize magnets when necessary,
  • re-manufacture servo motor flange using the original flange and factory dimensions
  • repair or rewind servo motor winding, insulation, connections, steam clean and bake
  • replace brush holder and brushes (or repair brush holder if obsolete)
  • test to confirm there are no grounded electrical parts in the servo motor.
  • all AC stators are surge tested to at least 1500 volts This ensures that the insulation and windings will withstand the loads put on the servo motor when running on a machine.
  • after the bakin g process, DC Servo motor armatures go through a bar to bar test. This test will show if there are any shorts or opens in the winding.
  • servo motor alignment
  • High-grade sealed bearings
  • Double lip seals in the front flange
  • Replace all new seals, O-rings, gaskets and connectors
  • Two part epoxy coating for an added protection

After servo motor repairs and preliminary testing are complete, the servo motor is reassembled for final testing. Servo motor repairs are not complete until after final testing procedure is performed. During the final test procedure, servo motors should be connected to an inverter drive with and without a load, to ensure functionality before returning to customer. Final testing also allows verification that the servo motor can operate at full voltage and withstand full load amps of the motor specifications.

Servo motor repairs should only be performed by facilities that work closely with all servo motor manufacturers so that the newest servo drives are being used in conjunction with their corresponding servo motors. Precision Electric recommends all manufacturers keep spare servo motors on crucial production lines. Keeping a spare can minimize downtime and prevent production losses while repair services are being processed. Servo motor repairs performed by Precision Electric includes a 12 month in-service warranty. The Precision Electric in-service warranty begins the day the servo motor is put into production and ends 12 months later.

For pricing on servo motor repairs and servo motor replacements, contact Precision Electric.