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Mitsubishi motion controller rush repair for downtime recovery

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 by Roc Industrial LLC

Is your Mitsubishi motion controller malfunctioning and causing costly downtime? Roc Industrial LLC specializes in fast, reliable Mitsubishi motion controller repair services. We understand the critical role these controllers play in your automation systems. Our experienced technicians provide expert troubleshooting, component-level repairs, and thorough testing to get your equipment back up and running quickly. Trust Roc Industrial LLC for all your Mitsubishi motion controller service needs.



About Mitsubishi Motion Controllers

Mitsubishi Electric is a global leader in automation technology, and their motion controllers are renowned for their precision, reliability, and advanced features. Mitsubishi motion controllers are integral components in a wide range of industrial applications, providing precise control over motors and other actuators. These controllers are designed to handle complex motion profiles, synchronization, and positioning tasks, making them essential for modern automation systems. From simple point-to-point movements to sophisticated multi-axis coordinated motion, Mitsubishi motion controllers offer the performance and flexibility required for demanding applications.


Mitsubishi motion controllers are widely used in industries such as CNC machining, robotics, packaging, printing, and material handling. Their robust design and advanced control algorithms ensure accurate and repeatable performance, contributing to increased productivity and efficiency. The MELSERVO series, for example, is a popular choice for servo control applications, offering a range of features such as advanced vibration suppression, adaptive tuning, and high-speed communication interfaces. Mitsubishi's commitment to innovation and quality has made them a trusted partner for manufacturers worldwide.



Supported Models & Series

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

  • MELSERVO MR-J4 Series: Including MR-J4-10A, MR-J4-20A, MR-J4-40A, MR-J4-60A, MR-J4-70A, MR-J4-100A, MR-J4-200A, MR-J4-350A, MR-J4-500A, MR-J4-700A, MR-J4-1KA, MR-J4-2KA, MR-J4-3KA, MR-J4-5KA, MR-J4-7KA.

  • MELSERVO MR-J3 Series: Including MR-J3-10A, MR-J3-20A, MR-J3-40A, MR-J3-60A, MR-J3-70A, MR-J3-100A, MR-J3-200A, MR-J3-350A, MR-J3-500A, MR-J3-700A, MR-J3-1KA, MR-J3-2KA, MR-J3-3KA.

  • MELSERVO MR-JE Series: Including MR-JE-10A, MR-JE-20A, MR-JE-40A, MR-JE-60A, MR-JE-70A, MR-JE-100A, MR-JE-200A, MR-JE-350A, MR-JE-500A, MR-JE-700A.

  • Q Series Motion Controllers: Including QD75P1, QD75P2, QD75P4, QD77MS2, QD77MS4, QD77GF4.

  • L Series Motion Controllers: Including LD75P1, LD75P2, LD75P4, LD77MS2, LD77MS4.

  • iQ-R Series Motion Controllers: Including RD75P2, RD75P4, RD77MS2, RD77MS4, RD77GF4.

  • Simple Motion Modules: Including various models across different series. Contact us with your specific model number.

  • Legacy Models: We also offer repair services for many older and discontinued Mitsubishi motion controller models. Please contact us with your specific requirements.


Common Mitsubishi Motion Controller Problems We Repair

Mitsubishi motion controllers are generally reliable, but like all electronic equipment, they can experience failures over time. We understand the frustration and downtime that these issues can cause. Here are some of the most common problems we repair:

  • Communication Errors: Loss of communication with the PLC, network issues, or faulty communication modules. This can manifest as error codes related to network connectivity or data transmission.

  • Servo Amplifier Faults: Overcurrent, overvoltage, or overheating issues within the servo amplifier. These faults can trigger protective shutdowns and prevent the motor from operating correctly.

  • Encoder Problems: Encoder signal loss, incorrect position feedback, or encoder communication errors. This can lead to inaccurate positioning and jerky movements.

  • Power Supply Failures: Internal power supply failures resulting in no power or unstable voltage output. This can prevent the entire controller from functioning.

  • Drive Errors: Errors related to the motor drive, such as motor overload, short circuits, or incorrect motor parameters.

  • Overheating: Excessive heat buildup due to inadequate cooling, component failure, or environmental factors. Overheating can lead to premature component failure and reduced performance.

  • Blown Fuses: Frequent fuse blowing indicating a short circuit or overload condition. Replacing the fuse without addressing the underlying issue will only result in repeated failures.

  • Software or Firmware Corruption: Corrupted software or firmware leading to erratic behavior or complete controller failure. This can occur due to power surges, improper programming, or hardware malfunctions.

  • I/O Module Failures: Malfunctioning input/output modules preventing the controller from receiving signals from sensors or controlling actuators.

  • Positioning Errors: Inaccurate positioning, drifting, or inability to maintain a stable position. This can be caused by encoder problems, servo amplifier issues, or incorrect tuning parameters.


Our Mitsubishi Motion Controller Repair Process

At Roc Industrial LLC, we follow a rigorous and comprehensive repair process to ensure the highest quality Mitsubishi motion controller repairs. Our goal is to quickly diagnose the problem, perform the necessary repairs, and thoroughly test the unit to ensure it meets or exceeds original performance specifications.

  1. Free Evaluation and Quote: We start with a free, no-obligation evaluation of your Mitsubishi motion controller. Simply send us your unit, and our experienced technicians will thoroughly inspect it to identify the root cause of the problem. We will then provide you with a detailed repair quote outlining the necessary repairs and associated costs.

  2. Shipping Instructions: Once you approve the quote, we will provide you with detailed shipping instructions to ensure your unit arrives safely at our repair facility. We can also arrange for expedited shipping if needed to minimize downtime.

  3. Diagnosis Using Specialized Test Equipment: Our technicians use state-of-the-art diagnostic equipment to pinpoint the exact cause of the failure. This includes oscilloscopes, logic analyzers, signal generators, and specialized Mitsubishi testing software. We perform thorough testing of all critical components and circuits to ensure accurate diagnosis.

  4. Component-Level Repair and Replacement: We perform component-level repairs whenever possible, replacing only the faulty components rather than the entire unit. This can save you significant money and reduce waste. We use only high-quality replacement parts that meet or exceed original manufacturer specifications. Our technicians are skilled in soldering, desoldering, and surface mount technology (SMT) techniques.

  5. Load Testing and Quality Checks: After the repairs are completed, we perform rigorous load testing to ensure the unit operates correctly under real-world conditions. We simulate various operating scenarios and monitor performance parameters such as voltage, current, temperature, and signal integrity. We also conduct thorough quality checks to ensure all repairs meet our strict standards.

  6. Warranty-Backed Return and Support: All our Mitsubishi motion controller repairs are backed by a comprehensive warranty. If you experience any problems with the repaired unit within the warranty period, simply contact us, and we will promptly address the issue. We also provide ongoing technical support to answer any questions you may have.


Nationwide Repair Services

Roc Industrial LLC provides Mitsubishi motion controller repair services to customers nationwide. We understand that downtime can be costly, so we offer fast turnaround times and expedited shipping options to minimize disruption to your operations. Whether you are located in New York, Los Angeles, Chicago, Houston, Dallas, or any other city in the United States, we can provide you with reliable and efficient repair services.


We have established partnerships with leading shipping providers to ensure your Mitsubishi motion controllers are transported safely and securely. We offer a variety of shipping options, including overnight, two-day, and standard ground service. Our team will work with you to determine the best shipping method based on your specific needs and budget. We also provide tracking information so you can monitor the progress of your shipment.



Why Choose Roc Industrial LLC?

When you choose Roc Industrial LLC for your Mitsubishi motion controller repair needs, you can be confident that you are getting the highest quality service and expertise. Here are some of the reasons why we are the preferred choice for industrial equipment repairs:

  • 30+ Years of Experience: We have been providing industrial equipment repair services for over 30 years, giving us the knowledge and experience to handle even the most complex repairs.

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

  • Thousands of Parts in Stock: We maintain a large inventory of spare parts, allowing us to quickly complete repairs and minimize downtime.

  • Fast Turnaround, Often Same-Day: We understand the importance of minimizing downtime, so we offer fast turnaround times, often completing repairs the same day.

  • 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. Our team is always available to answer your questions and address any concerns you may have.

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 service and troubleshooting needs. We also offer Mitsubishi motion controller testing and refurbishment services to extend the life of your equipment and prevent future failures. Trust Roc Industrial LLC to keep your automation systems running smoothly.

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