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Repair of Mitsubishi Spindle Motors

SJ-V
SJ-2
SJ-4

SJ-P
SJ-N

Mitsubishi Spindle Motors

We test and repair Mitsubishi spindle motors.
Additionally, we also offer services for Mitsubishi drives.

We specialize in the following motor series:

  • SJ-V
  • SJ-2
  • SJ-4
  • SJ-P
  • SJ-N

Our repair process is preventive in nature and includes a series of steps that contribute to ensuring high repair quality.

Error Analysis and Localization

What can you do?

Spindle Motor Errors

Possible Solutions and Notes

  • Replace the motor for testing purposes.
  • Check cable connections.
  • Detach the motor from the shaft or belt and test at different speeds.
  • Check or replace the drive.
  • Perform insulation testing on the motor.
  • Visually inspect the motor.
  • Visually inspect the encoder area for dirt, optionally have it cleaned by a specialized facility.
  • Check encoder signals: For older motors with analog encoders, read sinusoidal diagrams with an oscilloscope.
    For serial encoders, also check operating voltages.

If these measures do not help, the problem is usually due to a faulty encoder or worn bearings.

For additional error messages, refer to the alarm list available for download at the end of the form.

Possible Solutions and Notes

  • Detach the motor from the shaft or belt and test at different speeds.
  • Disconnect motor connection cables and completely relieve the motor of loads. Then rotate it by hand.
    If the motor is still stiff or making unusual noises, the bearings may be defective.
  • Check motor for insulation and windings for breakdown.
  • Check encoder.

For additional error messages, refer to the alarm list available for download at the end of the form.

Possible Solutions and Notes

  • Visually inspect the encoder area for dirt, possibly have it cleaned by a specialized facility.
  • Check encoder signals: For older motors with analog encoders, read sinusoidal diagrams with an oscilloscope.
    For serial encoders, also check operating voltages.
  • Replace encoder.

For additional error messages, refer to the alarm list available for download at the end of the form.

Handling Parameters

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

What to consider during parameterization?

  • In most cases, motor parameters are stored in the drive or controller.
  • Obtain the appropriate documentation or software for setting the parameters.
VIDEO: Repair and test process of Mitsubishi AC Servo/Spindle Drives MDS-A/B/C/D/DH

The typical process of repairing Mitsubishi spindle motors

Visual inspection of the motor.

The repair process for spindle motors includes the following steps:

  • Preventive overhaul - replacement of all necessary defective and worn parts. Renewal of ball bearings and seals.
  • Intensive cleaning, paint stripping, and degreasing.
  • New painting.
  • Comprehensive final and long-term tests on our test benches with subsequent final adjustment.
  • Completion of documentation and checklists.
VIDEO: Mitsubishi AC Spindle Motor SJ-N5.5XZM Test and Repair

High-quality Spare Parts for High-quality Repairs

Thousands of spare parts in stock available to the technician.
                    In addition to simply replacing worn components, refurbishing worn parts is sensible,
                    as complex capital goods typically contain very valuable individual parts.
                    Replacing them with new parts consumes valuable resources and incurs high costs.

For Mitsubishi spindle motors, we replace:

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

Additionally, we proactively replace certain components that have proven to be vulnerable due to recurring defects.

To prevent bottlenecks and product discontinuations, we monitor our inventory levels using process-oriented software solutions. We pre-order some parts and even secure sufficient spare parts for a year for series repairs.

Quality and Level of Repair

Professional repairs require the use of a test bench. A tailor-made and complex test equipment is developed for each new series. The devices are thoroughly checked for functionality by undergoing long-term testing.
Testing under realistic conditions.
                    After a professional repair on servo and spindle motors, a final test can be conducted.

The test is conducted on a state-of-the-art test bench that closely simulates the workflows of a real machining machine with Mitsubishi control.

Testing includes:

  • Encoder connection
  • Alarm states
  • Speed
  • Current and voltage consumption
  • Temperature
  • Vibration
  • Noise level
VIDEO: Mitsubishi AC Spindle Motor SJ-N5.5XZM Test and Repair

We continuously expand our repair portfolio with new series

Since drive and power electronics are often discontinued early, supply bottlenecks arise, and you may come under pressure to procure replacement parts for your customers in a timely manner. We support you in analyzing bottlenecks and work together on optimal solutions.

Typical procedures include:

  • Development of test stations and procedures.
  • Organization of spare parts.
  • Preventive repairs at the component level.
  • If necessary, development or re-engineering of modules or complete devices.

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