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Mitsubishi motion controller troubleshooting with warranty

ISO 9001:2015 Certified Quality

Our certified process ensures consistent quality and reliable repairs every time.

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2-Year Repair Warranty

We stand behind our repairs with an extensive 2-year warranty on parts and labor for your peace of mind.

Fast Turnaround Time

Our efficient process and large parts inventory help minimize your operational downtime.

Expert Component-Level Repair

We find and replace individual failed components, offering a more affordable and effective repair than full replacement.

Free, No-Obligation Quote

Send us your item for a free evaluation and receive a detailed repair quote with no commitment required.

Mitsubishi Motion Controller Repair Services

Is your Mitsubishi motion controller malfunctioning and disrupting your critical operations? Roc Industrial LLC specializes in providing fast, reliable, and expert Mitsubishi motion controller repair services. We understand the importance of minimizing downtime, and our experienced technicians are dedicated to quickly diagnosing and resolving any issues with your Mitsubishi motion control equipment. As a trusted repair provider, Roc Industrial LLC offers comprehensive repair solutions backed by our commitment to quality and customer satisfaction.



About Mitsubishi Motion Controllers

Mitsubishi Electric is a globally recognized leader in automation technology, and their motion controllers are integral components in a wide range of industrial applications. Mitsubishi motion controllers are known for their precision, reliability, and advanced features, making them a preferred choice for demanding applications across various industries. These controllers are designed to manage and coordinate the movement of machinery, ensuring smooth and efficient operation in complex automated systems.


Mitsubishi motion controllers are widely used in CNC machines, robotics, packaging equipment, and other automated systems. Their robust design and advanced control algorithms enable precise control over motor movements, resulting in increased productivity and improved product quality. The MELSERVO series, in particular, is renowned for its high performance and versatility, catering to diverse application needs. Roc Industrial LLC has extensive experience in servicing and repairing various Mitsubishi motion controller models, ensuring your equipment operates at peak performance.



Supported Models & Series

We repair a wide range of Mitsubishi motion controller models and series, including but not limited to:

  • MELSERVO-J4 Series

  • MELSERVO-J5 Series

  • MELSERVO-J3 Series

  • Q Series Motion Controllers

  • L Series Motion Controllers

  • Simple Motion Modules (RD77MS)

  • SSCNet III/H Compatible Controllers

  • MR-J4-B Servo Amplifiers

  • MR-J3-D05 Servo Amplifiers

  • QD77MS16

  • QD77MS4

  • LD77MS16

  • LD77MS4

  • Advanced Motion Control Units


Common Mitsubishi Motion Controller Problems We Repair

Mitsubishi motion controllers, while highly reliable, can experience various issues over time. These problems can lead to unexpected downtime and reduced productivity. Roc Industrial LLC is equipped to handle a wide range of common failures, ensuring your equipment is quickly restored to optimal working condition.

  • No Output: The controller fails to send signals to the servo drives, resulting in no motor movement.

  • Communication Errors: Issues with communication between the controller and other devices, such as HMIs or PLCs.

  • Overvoltage/Undervoltage: Voltage fluctuations can damage sensitive components within the controller.

  • Overheating: Excessive heat can cause the controller to malfunction or shut down.

  • Blown Fuses: Frequent fuse failures indicate an underlying problem that needs to be addressed.

  • Encoder Faults: Problems with the encoder feedback signal, leading to inaccurate positioning or erratic movement.

  • Power Supply Failures: The internal power supply unit may fail, preventing the controller from powering on.

  • Software Errors: Corrupted or outdated software can cause operational issues.

  • Axis Control Problems: Inability to control specific axes or unexpected axis movements.

  • Parameter Errors: Incorrect or corrupted parameter settings leading to malfunction.

  • Drive Communication Errors: Loss of communication between the motion controller and connected servo drives.


Our Mitsubishi Motion Controller Repair Process

Roc Industrial LLC follows a rigorous and comprehensive repair process to ensure the highest quality repairs for your Mitsubishi motion controllers. Our process is designed to quickly identify and resolve any issues, minimizing downtime and maximizing the lifespan of your equipment.

  1. Free Evaluation and Quote: We offer a free evaluation of your faulty Mitsubishi motion controller to determine the extent of the damage and provide you with a detailed repair quote. This allows you to make an informed decision before proceeding with the repair.

  2. Shipping Instructions: Once you approve the quote, we provide clear and concise shipping instructions to ensure your equipment arrives safely at our repair facility. We can also arrange for expedited shipping if needed.

  3. Diagnosis Using Specialized Test Equipment: Our experienced technicians use state-of-the-art diagnostic equipment to pinpoint the root cause of the problem. We perform thorough testing to identify any faulty components or underlying issues.

  4. Component-Level Repair and Replacement: We specialize in component-level repairs, replacing only the faulty components with high-quality replacements. This approach is more cost-effective than replacing the entire unit and ensures the longevity of the repair.

  5. Load Testing and Quality Checks: After the repair is complete, we perform rigorous load testing to ensure the controller operates correctly under real-world conditions. We also conduct thorough quality checks to verify that all repairs meet our stringent standards.

  6. Warranty-Backed Return and Support: All our Mitsubishi motion controller repairs are backed by a comprehensive warranty, giving you peace of mind. We also provide ongoing technical support to address any questions or concerns you may have after the repair.


Nationwide Repair Services

Roc Industrial LLC provides Mitsubishi motion controller repair services to customers nationwide. We understand the importance of minimizing downtime, regardless of your location. We serve customers in major metropolitan areas, including New York, Los Angeles, Chicago, Houston, and Dallas, as well as smaller cities and rural areas across the country.


We offer fast shipping options and quick turnaround times to get your equipment back up and running as quickly as possible. Our efficient logistics and streamlined repair process allow us to provide timely and reliable service to all our customers, no matter where they are located. Contact us today to learn more about our nationwide repair services for Mitsubishi motion controllers.



Why Choose Roc Industrial LLC?

When it comes to Mitsubishi motion controller repair, Roc Industrial LLC stands out as a trusted and reliable partner. We offer a range of benefits that set us apart from the competition:

  • 30+ Years of Experience: With over three decades of experience in industrial electronic repair, we have the knowledge and expertise to handle even the most complex Mitsubishi motion controller issues.

  • Warranty-Backed Repairs: All our repairs are backed by a comprehensive warranty, giving you peace of mind and ensuring the quality of our workmanship.

  • Thousands of Parts in Stock: We maintain a large inventory of Mitsubishi motion controller parts, allowing us to quickly source and replace faulty components.

  • Fast Turnaround, Often Same-Day: We understand the importance of minimizing downtime, and we strive to provide fast turnaround times, often offering same-day repair services for urgent situations.

  • ISO-Certified Repair Processes: Our repair processes are ISO-certified, ensuring that we adhere to the highest standards of quality and efficiency.

  • Exceptional Customer Support: We are committed to providing exceptional customer support, from the initial evaluation to the final repair and beyond. Our friendly and knowledgeable staff is always available to answer your questions and address your concerns.

Don’t let a faulty Mitsubishi motion controller slow down your operations. Contact Roc Industrial LLC today for a free evaluation and fast, reliable repair. We are your trusted partner for all your Mitsubishi motion controller troubleshooting and repair needs. We also offer Mitsubishi motion controller refurbishment services to extend the life of your equipment and improve its performance.

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