30.06.2025 by Viktor Siebert
Retrofitting from the Perspective of Selected Machine Manufacturers Mitsubishi MDS-DH-V2-8040 Servo Drive
In our collaboration with various machine builders, we regularly encounter different perspectives on retrofitting. Particularly noteworthy is the approach taken by some medium-sized manufacturers who breathe new life into used machines—without redesigning them from scratch, but through careful restoration.
Giving Machines a Second Life
These manufacturers specifically purchase second-hand machines—sometimes 10, 15, or even 20 years old—and bring them back to life. The machines are not completely disassembled or rebuilt with entirely new components. Instead, they are restored to a condition that rivals the performance and precision of a new machine.
Key mechanical wear parts such as seals, hoses, and cables are, of course, replaced. But the core approach focuses on detail-oriented refurbishment: bearings, guides, electronic modules, and other critical components are inspected, renewed, or overhauled—all with the goal of restoring original accuracy, stability, and quality.
Why Do Manufacturers Choose This Approach?
There are several reasons why manufacturers follow this path:
- Cost efficiency: Refurbishing used machines is significantly more affordable than investing in new equipment.
- Sustainability: Existing resources are utilized sensibly instead of consuming new ones.
- Technical maturity: Proven machine designs have demonstrated reliability in industrial environments over many years.
- Customization: Only the components that are necessary are refurbished—tailored to the specific use case of the machine.
- Availability: Some machine series are no longer available as new models.
A Practical Example: Overhauling Mitsubishi MDS-DH-V2-8040 Servo Drives
A good example from our workshop shows how we actively support this philosophy. For a medium-sized machine builder, we regularly overhaul Mitsubishi MDS-DH-V2-8040 servo drive units. These drives have often been in operation for more than a decade and exhibit typical aging issues.
The following components are replaced as part of our standard procedure:
- Power modules (IGBTs)
- Fan units
- Relays and optokoppler ICs
- Capacitors in all areas
The entire device is also professionally cleaned and restored to near-new condition—both visually and functionally.
Quality Through Standardization and Testing
To ensure consistently high quality, we develop a specific test system—known as a testrack—for each device family. These include original controllers, motors, and drives of the corresponding series. The development of such test environments can take several months.
In parallel, we standardize our repair processes and document each device in detail. This ensures that every refurbished unit meets the exact same quality criteria—regardless of time or technician.
Our Contribution to Sustainable Industry
We don’t just see ourselves as a repair service provider, but as an active partner for sustainable industrial processes. Through technical expertise, structured procedures, and a genuine passion for durable solutions, we contribute to a resource-conscious Industry 4.0.
To mentioned Mitsubishi Drive: Mitsubishi MDS-DH-V2-8040 Servo Drive
More details about our Mitsubishi repair services can be found here:
Mitsubishi drive Repair by Industrypart
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Technical Summary of the Unit
Technical Background: Mitsubishi Servo Drive Unit MDS-DH-V2-8040
The Mitsubishi MDS-DH-V2-8040 is a dual-axis servo drive unit operating on a 400V system. It is part of the Mitsubishi MDS-DH series and is typically used in CNC machines for high-precision motion control applications. These units are often more than 10–15 years old and are no longer available as new replacements.
Key technical specifications:
| Brand | Mitsubishi |
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| Type | Servo Drive Unit |
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| Model | MDS-DH-V2-8040 |
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| Country Of Origin | JAPAN |
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| Input Current | 8.9A |
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| Input Current 1 | 0.1A |
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| Input Frequency | 50/60Hz |
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| Input Voltage | DC513-648V |
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| Input Voltage 1 | 380-440/-480V |
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| Output Current | 15.0/7.3A |
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| Output Frequency | 0-240Hz |
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| Output Voltage | 456V |
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| Phases | 1PH |
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| Phases 1 | 3PH |
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| Power | 4.5/2. OkW |
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| Year Of Manufacture | 11/06 |
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