Repair of Yaskawa Sigma V Servomotors

SGMJV SGMAV SGMGV
SGMSV SGMEV

Yaskawa Sigma V Servomotors

We test and repair Yaskawa Sigma V servomotors.
Additionally, we also offer services for servo drives.
Video: Yaskawa Sigma V Servomotors. Testing and Repair at industrypart GmbH
Video: Yaskawa Sigma V Servomotors. Testing and Repair at industrypart GmbH

We specialize in the following series:

  • SGMJV-A5 to 08 Example: SGMJV-01ADA21
  • SGMAV-A5 to 10 Example: SGMAV-08ADA61
  • SGMGV-03 to 1E Example: SGMGV-20DDA6H
  • SGMSV-09 to 70 Example: SGMSV-70ADA6S
  • SGMEV-01 to 15 Example: SGMEV-04D3A61

Special Motors from Yaskawa Motoman Robots

  • SGMGV-**--YG** Example: SGMGV-13D3W-YG16

Yaskawa Sigma V Mini

  • SGMMV-B3 to A3 Example: SGMMV-A3E2A21 (SGMMV ultra-small capacity brushless servomotor)

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

Fault Analysis and Localization

What Can You Do?

Servomotor Errors

Possible Solutions and Tips

  • Detach the motor from the shaft or belt and test at various speeds.
  • Disconnect the motor connection cable and completely relieve the motor of any load. Then turn it by hand.
    If the motor is still stiff or makes unusual noises, the bearings may be defective.
  • Check the motor for insulation and winding faults.
  • Check the encoder.

You can find more error messages in the alarm list available for download at the end of the form.

Possible Solutions and Tips

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

You can find more error messages in the alarm list available for download at the end of the form.

Possible Solutions and Tips

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

If these measures do not help, the fault is usually due to a defective encoder or worn-out bearings.

You can find more error messages in the alarm list available for download at the end of the form.

Possible Solutions and Tips

  • Detach the motor from the shaft or belt and test at various speeds.
  • Disconnect the motor connection cable and completely relieve the motor of any load. Then turn it by hand.
    If the motor is still stiff or makes unusual noises, the bearings may be defective.
  • Check the motor for insulation and winding faults.
  • Check the encoder.

You can find more error messages in the alarm list available for download at the end of the form.

Possible Solutions and Tips

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

You can find more error messages in the alarm list available for download at the end of the form.

Handling Parameters

When configuring parameters, it is crucial to secure the settings early on and to document jumper and key settings as well.
Parameter being set on the device

What should you pay attention to when setting parameters?

  • In most cases, motor parameters are stored in the drive or control system.
  • 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 Yaskawa Drive Motors

The repair process for servomotors includes the following steps:

  • Preventive overhaul - Replacement of all necessary defective and worn 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 adjustments.
  • Completion of documentation and checklists.

High-Quality Spare Parts for High-Quality Repairs

For Yaskawa drive motors, we replace:

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

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

To prevent shortages and product discontinuations, we monitor our inventory using process-oriented software solutions. We pre-order some parts and secure sufficient spare parts for series repairs for up to one year in advance.

Quality and Level of Repair

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

The test is conducted on a bench that simulates the processes as they occur in a real processing plant.

The following aspects are tested:

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

We are continuously expanding our repair portfolio with new series

As drive and power electronics are often discontinued prematurely, you may feel pressured to provide replacements to your customers in a timely manner. We support you in analyzing shortages and work together on 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 complete devices

Information on the Series

Sigma-V Servomotors:

  • SGMJV-A5A3A21
  • SGMAV-A5A3A21
  • ...

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:
  • Preventive overhaul - replacement of all necessary defective and used parts. e.g. ball bearings, plugs, seals, encoders and brakes.
  • Intensive cleaning
  • Extensive final and load tests on our test stands
  • Parameter adjustment or parameter recovery
You can find more information on the process flow for motor repair here.

Further information

What is the meaning of letters and numbers in the type designation
For a better understanding of all the options, which can be found in the type designation, we offer you a separate configurator.
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.
SGMGV_Sigma-5_rotary_servo_motors_datasheet_en.pdf (1.86 MB)
SGMJV_Datasheet.pdf (0.06 MB)
SGMMV_Datasheet.pdf (1.51 MB)

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

To the Yaskawa Sigma V Catalog Contact us
Service company for drives and motors.

Service company for drives and motors.


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