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Repair or Replace a Failed Servo Motor?

A failed servo motor is never a good thing. Aside from the expenses of halting production and the costly downtime of finding the right solution, there's another important question to ask: Should I repair a failed servo or simply buy another motor? The correct answer to this question can mean the difference between a lengthy and expensive situation and a prompt return to production. When deciding between repairing or replacing a servo motor, consider these factors:
  • Why did the motor fail? What were the symptoms?
  • Is there a spare unit on hand that can be put into service?
  • Is the machine down? What is the cost of continued downtime?
  • What is the cost of a new motor? Is it immediately available or is there a lengthy lead-time until it can be delivered and put into service?
  • What is the warranty (in-service) for a repair?
  • Can you find a servo repair vendor willing to provide a free quote?
    Can they do so in a timely manner?
  • Is the repair vendor reputable? How long have they been repairing servo motors?
  • Even if the repair is more than 50% the cost of buying a new motor,
    can the machinery be running more quickly than buying new?
By taking a few minutes to gather some information on your options, you can determine very clearly which path will best minimize your costs. The servo motor repair specialists at TigerTek Industrial Services can help you weigh these options and make the best decision for getting back up and running at the least expense.

TigerTek is dedicated to providing expert servo repair services at the highest level of quality possible, with a focus on turnaround time, customer service, extremely competitive prices, and one of the most comprehensive warranties available. We've partnered with hundreds of clients across the US, from Fortune 500 companies to smaller organizations. We look forward to the opportunity to work with you - call us 24 hours a day at 1.(877) 623-1717 or contact us for a free quote.
Wishing A Happy Retirement!
Farewell To Peter Mitchell  
After over 30 years of service to industrial repair services, Peter Mitchell announced his retirement as of August 31, 2016.

Mr. Mitchell spent 14 years in the industry with Electrical South in Greensboro, NC.  He left there to pursue his own opportunities as the owner of TigerTek Industrial Services, Inc. in March of 1998 (formerly Oakley Electric).

For the next 17 years, Peter served as President of TigerTek Industrial Services, Inc., which moved to 2741 NC HWY 135, Stoneville, NC in 2007, where it is located to this day.

In  October of 2015, Peter sold the company to Omninvest, LLC but he, along with the other employees, remained with the new company. He served as President until his retirement.
All of us here at TigerTek wish Peter the very best in his well-deserved retirement. Congratulations, Peter!
Reduce Costs & Avoid Downtime
With Proper Servo Motor Sizing
Servo motor sizing is an energy balancing act. Done properly, it reduces energy costs, purchasing costs, and operating costs. Plus, it enables the design of better motion control systems. Servo motor sizing also provides considerable cost savings while assuring the best system performance, and can dramatically reduce downtime and the need for   servo motor repair.

The U.S. Department of Energy estimates that approximately eighty percent of servo motors in the U.S. are oversized. This is usually due to uncertain load requirements; allowance for load increase (due to aging mechanical components); and availability. It is not easy to select the optimum servo motor size for a given application when standard praxis demands the addition of safety factor to torque requirements. This safety factor is to cover for additional friction forces that may occur during the aging of mechanical components. Add to that the time consuming determination of system load and the selection of the correct servo motor size. Since Torque = Inertia x Acceleration, each motor has its own rotor inertia that contributes to system load torque. Therefore, system torque must be calculated for each servo motor size under consideration for an application.

There are advantages to over-sizing a servo motor, namely to prevent under-sizing. But an undersized servo motor won't be able to move the load sufficiently, if it can move it at all, and in some cases it may overheat or burn out. 20% over-sizing a servo motor is considered acceptable in the following scenarios:
  1. Mechanical components such as ball bearings or couplings encounter wear, depending on the environment and service quality, that may produce higher friction forces. These friction forces contribute to constant torque. In such a case, a servo motor sized 20% larger than necessary is acceptable.

  2. In the event of future expansion, a servo motor oversized by 20% would provide the additional capacity necessary and may even eliminate the need to replace the existing servo motor.

  3. Higher loads can likely be sustained in circumstances wherein the higher load was not anticipated.

  4. Oversized servo motors are likely to start as well as operate in undervoltage conditions.
Bottom Line: For optimum performance at the lowest possible cost it is essential to choose the smallest servo motor that matches the required torque as closely as possible. Smaller torque will result in lower costs and lower power consumption.

For help with servo motor sizing or other repair services for servo motors, TigerTek helps clients around the US with our industry-leading quality, experience, turnaround time & customer service, all at highly competitive prices. Contact us to ensure you get the proper servo motor size for your system and unparalleled workmanship.
Standards and Control Processes
Our Quality Guidelines 
To ensure the highest quality repair, we adhere to the following standards and control processes:
  • EASA AR 100: 
    The recommended practice for the repair of a rotating electrical apparatus from Electrical Apparatus Service Association, Inc. This is critical for the consistent quality standard for repairs. Ensures complete assessment and proper process for motor repairs.
     
  • IEEE Standards:  
    Institute of Electrical and Electronics Engineers ensures consistency in the manufacturing of motors.
     
  • NEMA: 
    Standards from National Electrical Manufacturer's Association provide guidelines for how a motor should fit in standard applications. Manufacturers keep consistent dimensions to ensure the fit of your motor. NEMA promotes safety in the design, manufacture and use of electrical products.
     
  • ANSI:
    The American National Standards Institute sets standards for a wide range of technical areas, from electrical specifications to communications protocols.
     
  • NIST:
    The National Institute of Standards and Technology, a unit of the U.S. Commerce Department. Formerly known as the National Bureau of Standards, NIST promotes and maintains measurement standards. It also has active programs for encouraging and assisting industry and science to develop and use these standards.
     
  • UL:
    UL Listing means that Underwriters Laboratories, Inc. has tested representative samples of the product and determined that it meets UL's requirements. These requirements are based primarily on UL's published and nationally recognized Standards for Safety.
     
  • TigerTek Motor Tracking Process:
    Once a motor enters the TigerTek facility, there is a system designed to track the motor itself and any test or service it has completed. A customer will know where their motor is at any given point in time. Using a job number, the process provides a paper trail and online access for complete documentation of the testing and services performed by TigerTek.
     
  •   TIS Advanced Standards:
    We exceed all of the above recognized standards and control processes with our own Tigertek Industrial Services Advanced Standards. We go above and beyond the minimum requirement to ensure safety and maximum effectiveness of your equipment.      
Kind Words
I really want to thank you and your company for all your help. I do appreciate it very much, all of your quick responses were a very welcome sight. So thank you so much again. The press is repaired, your quick responses and time taken to search for an answer for me have renewed my faith that there are still good people left in the work world, people who still care about customers.        - Ford Motor Company
TigerTek Industrial Services, LLC  |  P:  336.623.1717  |  info@tigertek.com  |  www.tigertek.com

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