Repair of Fanuc AC Servo and Spindle Motors

Fanuc
Spindle Motors Fanuc
Servo Motors

Fanuc AC Servo and Spindle Motors

We test and repair Fanuc AC servo and spindle motors.
Additionally, we also offer services for Fanuc servo and spindle drives as well as power supplies.
Video: Fanuc AC Servo and Spindle Motors. Testing and Repair at industrypart GmbH
Video: Fanuc AC Servo and Spindle Motors. Testing and Repair at industrypart GmbH

Spindle Motors:

  • Alpha I, Alpha a2, a3, a6, a8, a12, a18 such as A06B-0855-B100, A06B-0853-B390

Servo Motors:

  • Fanuc S Series, Fanuc Alpha I Series, Fanuc Alpha Series, Fanuc DC Axis Motors such as: A06B-0115-B103, A06B-0213-B100, etc.

Our repair process is preventive and includes a series of steps to ensure high repair quality.

Failure Analysis and Localization

What can you do?

Servo Motor Errors

Possible Solutions and Tips

  • Disconnect the motor from the shaft or belt and test at various speeds.
  • Disconnect the motor cables and completely relieve the motor of load. Then try turning it by hand.
    If the motor is still difficult to move or makes unusual noises, the ball bearings may be defective.
  • Check the motor for insulation issues and winding short circuits.
  • Check the encoder.

Further error messages can be found in the alarm list, available for download at the end of the form.

Possible Solutions and Tips

  • Visually check the encoder space for contamination, if necessary, have it cleaned by a specialized service.
  • Check encoder signals: For older motors with analog encoders, read the sine wave diagrams with an oscilloscope.
    For serial encoders, also check the operating voltages.
  • Replace the encoder.

Further error messages can be found in the alarm list, available for download at the end of the form.

Possible Solutions and Tips

  • Replace the motor as a test.
  • Check cable connections.
  • Disconnect the motor from the shaft or belt and test at various speeds.
  • Check or replace the drive.
  • Perform an insulation test on the motor.
  • Visually inspect the motor.
  • Visually check the encoder space for contamination, optionally have it cleaned by a specialized service.
  • Check encoder signals: For older motors with analog encoders, read the sine wave diagrams with an oscilloscope.
    For serial encoders, also check the operating voltages.

If these measures do not help, the error is usually caused by a defective encoder or worn ball bearings.

Further error messages can be found in the alarm list, available for download at the end of the form.

Possible Solutions and Tips

  • Disconnect the motor from the shaft or belt and test at various speeds.
  • Disconnect the motor cables and completely relieve the motor of load. Then try turning it by hand.
    If the motor is still difficult to move or makes unusual noises, the ball bearings may be defective.
  • Check the motor for insulation issues and winding short circuits.
  • Check the encoder.

Further error messages can be found in the alarm list, available for download at the end of the form.

Possible Solutions and Tips

  • Visually check the encoder space for contamination, if necessary, have it cleaned by a specialized service.
  • Check encoder signals: For older motors with analog encoders, read the sine wave diagrams with an oscilloscope.
    For serial encoders, also check the operating voltages.
  • Replace the encoder.

Further error messages can be found in the alarm list, available for download at the end of the form.

Handling Parameters

When parameterizing, it is crucial to secure settings early and also document jumper and key settings.
Parameter being set on the device

What should you consider when parameterizing?

  • In most cases, motor parameters are stored in the drive or control unit.
  • Obtain the necessary documentation or software for parameter setting.
    Further documentation on this topic can be found at the end of this page or feel free to contact us directly.

The Typical Repair Process of Fanuc Drive Motors

The Repair Process for Fanuc Servo Motors Includes the Following Steps:

  • Preventive Overhaul - Replacement of all necessary defective and worn-out parts. Renewal of bearings and seals.
  • Intensive cleaning, stripping, and degreasing.
  • Repainting.
  • Comprehensive final and long-term testing on our test benches, followed by final adjustment.
  • Completion of documentation and checklists.

High-quality spare parts for high-quality repairs

For Fanuc drive motors, we replace

  • Encoders
  • Encoder cables
  • Encoder connectors
  • Resolvers
  • Brakes
  • Bearings
  • Shaft seals
  • O-rings
  • Power cables
  • Power connectors

Additionally, we proactively replace certain components that have proven to be prone to recurring failures.

To prevent shortages and product discontinuations, we monitor our inventory using process-oriented software solutions. We order some parts in advance and even secure a sufficient stock of spare parts for a year for series repairs.

Quality and level of repair

A professional repair requires the use of a test bench. For each new series, specially adapted and complex test equipment is developed. The devices are thoroughly tested for functionality by subjecting them to a long-term stress test.

The test is carried out on a test bench that simulates the processes as in a real machining system.

The following aspects are tested:

  • Encoder connection
  • Alarm states
  • Speed
  • Current and voltage consumption
  • Temperature
  • Vibration
  • Noise level

We continuously expand our repair portfolio with new series

Since drive and power electronics are often discontinued prematurely, you may find yourself under pressure to supply replacements to your customers in time. We support you in analyzing bottlenecks and work together to find optimal solutions.

The typical process includes:

  • Development of test benches and procedures
  • Organization of spare parts
  • Preventive repair at the component level
  • If necessary, redevelopment or re-engineering of modules or entire devices

Frequently Asked Questions

Motor repair

In which quality/level are load tests performed at your company?
Complex and specially adapted test equipment is developed for each new series. Devices are tested with long-term load test thoroughly checked for functionality. Get an idea of our test facilities.
Do you have special spare parts, which are necessary for qualitative repair?
In times of shortages and discontinuations, we have process-oriented software solutions that monitor our inventories. We order some parts in advance, for series repairs even for 1 year, so that we can fall back on a large stock of spare parts. Certain modules are re-engineered by us.
Can you parameterize the devices?
If possible, a copy of the parameters is always read out and stored upon receipt. After successful repair, the data is compared and in case of exchange or sale, original parameters are transferred or restored to the new device. We have all the necessary hardware as well as software applications to parameterize Yaskawa devices according to the specifications.
What processes are involved in the repair of motors?
The repair process for motors includes, but is not limited to, the following:
  • New and fine adjustment of encoder/encoder systems
  • As needed winding repair and balancing
  • As needed connector repair or replacement
  • For irreparable equipment, an alternative solution will be offered (e.g. replacement or sale)
You can find more information on the process flow for motor repair here.

Further information

What are the example type designations for this device series?
  • Spindle motors: Alpha I, Alpha a2, a3, a6, a8, a12, a18, etc. Types such as A06B-0855-B100, A06B-0853-B390, A06B-0852-B300, A06B-0845-B100, A06B-0127-B075, A06B-1008-B902, A06B-0866-B380, A06B-1501-B105, etc.
  • Servo motors: Fanuc S Series, Fanuc Alpha I Series, Fanuc Alpha Series, Fanuc DC Axis Motors, types such as: A06B-0115-B103, A06B-0213-B100, A06B-0348-B357, A06B-0183-B275, etc.
  • Encoders: A20B-2002-0310, A20B-9000-0300, A290-1401-X036, A860-0326-T002, A290-0854-V320, A860-0321-T021, A860-0320-T113, A20B-9000-0010, A860-0309-T302, A860-2010-T341, etc.
Will I get a detailed repair report after a successful repair?
We document the repair process for every order. You can download a detailed description of the process here.
Do you commission new or unknown equipment?
We are continuously looking for new areas of activity. After consultation with the customer, we determine the necessary steps for a safe and qualitative repair
Can it happen that after repair my device continues to show errors?
It may happen that error messages continue to be displayed with the connected device. Already during the analysis of the errors, we give the customers suggestions for solutions for different malfunctions and errors. error cases, if we suspect further error causes. Errors and faults are documented, among other things, in the log file of the respective device, which may indicate, for example, encoder communication problems, cable defects or overloads.
What does serial repair or overhaul mean
Many of our customers have defective devices of the same model in larger quantities. We have optimized our processes for series repair and have the capacity to repair many devices in parallel quickly and to a high repair many devices in parallel.

Cost & Warranty

How much does a repair or overhaul of a device cost? What does "flat repair rate/standard repair price" mean?
The repair process itself represents a high degree of technical complexity, which we always want to master with a qualitative and long-term solution for you. solution for you. However, the maintenance of these quality characteristics requires, to agree on a repair flat rate or standard repair price. We communicate honestly and transparently all the information you need. For example, prices, previous and completed work steps, delivery times, etc.
Is there a warranty for the respective repair?
Basically we give 12 months warranty.

You can contact us in the following way:

Chat with our customer support, write us a message: [email protected] or call us: +49 6251 9888430

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Service company for drives and motors.

Service company for drives and motors.


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