For your information
- We offer for this displayed device sale, exchange and repair services.
- Prices for Servo-/Spindle Motors are standard prices for standard repair (Repairprice from)
- Devices for sell or exchange, was preventively overhauled in our workshop.
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Detailed information about Mitsubishi Servo Spindle Motor series
We offer serial repairs for this product series
- Repair of many electronic assemblies according to standardized repair procedures with documentation.
- A larger repair capacity is possible for the same or similar orders
- Target group: machine manufacturers, service companies and distributors
Access to years of experience, specialists and equipment.
Find out more about our series repairs
Overview
Proven Mitsubishi HF series AC servo motor, precise, robust and designed for demanding CNC axes in modern machines. This motor type is often used in combination with Mitsubishi MDS-DH servo drives and is characterized by excellent control quality, high reliability and long service life. Ideal for axis drives in milling and turning machines of the 400 V class.
- Device category: AC servo motor
- Series/Class: HF series, 400 V class
- Design: Fully enclosed, IP67, high-precision, service-friendly
Model designation
- HF = High Frequency AC Servo Motor
- H = High Performance Series
- 54 = Size 54 (medium power class)
- S = Standard version with smooth shaft
- A51 = Variant identifier (compatible with MDS-DH, 400 V system)
Technical Data
| Feature | Value |
|---|
| Rated power | 0.5 kW |
| Rated voltage | 3AC 340 V |
| Rated current | 1.1 A |
| Rated speed | 3000 r/min |
| Max. speed | 4500 r/min |
| Rated torque | approx. 1.6 Nm |
| Encoder | OSA105S5 (absolute, serial feedback, compatible with MDS-DH) |
| Cooling | Self-cooling (convection) |
| Protection class / Insulation class | IP67 / Class F |
| Weight / Dimensions | approx. 4.8 kg / n. a. |
Connections & Interfaces
- U / V / W: Three-phase connection (340 V AC) to the MDS-DH drive
- CN2 (encoder connection): OSA105S5 absolute encoder, serial interface to the drive
- PE / Grounding: separate ground connection on the motor housing
- Brake: not available (standard version without holding brake)
- Fan connection: not applicable (passive cooling)
Control board / Assemblies
- Permanent magnet rotor with precision balancing
- Stator winding with integrated temperature sensor
- Absolute encoder OSA105S5 with serial communication
- Connection box with high-density plug system
- Bearing sets with precision running, double shaft seal
Alarms & Troubleshooting
| Code | Bezeichnung | Typischer Befund | Prüfung | Abhilfe |
|---|
| 21 | No signal from the encoder | No feedback from the OSA105S5 | Check CN2 connection | Check connector/cable/encoder |
| 22 | Encoder data error | Data transmission faulty | Cable shielding, EMC | Replace cable/encoder |
| 24 | Earth fault | Insufficient insulation between U/V/W and PE | Insulation test | Replace cable or motor |
| 31 | Overspeed | Speed > setpoint | Check speed signal | Correct parameters |
| 32 | Overcurrent | Short circuit or IPM protection active | Check phases, winding | Check motor/drive |
| 46 | Motor overheating | Temperature sensor triggered | Ventilation, environment | Improve cooling |
| 50 | Overload 1 | Permanent overload | Analyze current profile | Check mechanics/load |
| 51 | Overload 2 | Axis blocked | Mechanics or brake stuck | Eliminate cause |
| 52 | Position error | Target-actual deviation too large | Check encoder value | Adjust mechanics or encoder |
| 9F | Low battery voltage | Absolute value system weak | Measure voltage | Replace battery, reference run |
Typical applications
- CNC axis drives with MDS-DH drive units
- Machine tools with high precision
- Positioning axes in milling centers and machining centers
- Machines with highly dynamic servo controls
Service notes
- Regularly check plug connections and cable seals
- Do not perform a megger test on the connected motor
- Replace the encoder battery regularly (every 3–5 years)
- After service: re-measure the zero point (reference run)
- Pay attention to a clean environment and EMC-compliant routing
Repair description
- Incoming inspection: Visual inspection, measurement of winding and insulation values, checking the encoder communication with the MDS-DH test stand
- Disassembly & cleaning: Open the housing, thorough cleaning of the stator, rotor and connection box, drying in the drying cabinet
- Analysis: Checking the bearings, encoder feedback (OSA105S5), winding condition, temperature sensor and plug connections
- Repair: Replacement of defective bearings, seals and, if necessary, encoder; renewal of lubrication; reconditioning of the housing seals
- Testing & load test: Test run with the original MDS-DH drive, monitoring of current consumption, temperature, torque and feedback signal
- Endurance test & conclusion: Continuous operation over several hours under real load, recording of the parameters, documentation and release for reinstallation
We Verify Your Drives and Electronic Components for Authenticity
Authenticity Check for Drives & Electronic Components: Confidence Before You Invest
Prevent failures caused by hidden counterfeits.
With our professional authenticity verification, you ensure
that your drives and system components truly meet original manufacturer quality before being installed in critical processes.
Why Authenticity Check Is Essential Today
The market for industrial drives, motors, and control components is globally interconnected. Components are traded through various channels, new, used, refurbished, or from warehouse stock.
As shown in our article Solutions Against Counterfeit Drive Components, products with unclear origin or altered substance repeatedly enter industrial supply chains.
For buyers, it is often not clearly recognizable:
- Whether it is an original product from the manufacturer
- Whether the device has been opened or technically modified
- Whether serial numbers and nameplates are authentic
- Whether all components correspond to the original condition
Especially in production-critical systems, unverified components can lead to downtime or consequential damage.
Professional authenticity verification provides clarity before the component is installed or resold.
What Exactly Is Checked During Authenticity Check?
Inspection of Nameplate and Serial Number
We compare serial numbers, production markings, and device designations with our technical reference data and manufacturer standards, checking them for plausibility and irregularities.
Visual and Mechanical Inspection
Our technicians professionally open the device and examine housing, screws, seals, connectors, and internal assemblies for signs of manipulation, replacement traces, or deviations from the original condition.
Electrical Measurements and Functional Testing
We test power and control units on our test benches under realistic conditions and verify whether the technical parameters comply with manufacturer specifications.
Software and Parameter Analysis
By reading firmware versions, parameters, and internal device data, we identify modifications, non-original configurations, or inconsistent software versions.
Comprehensive Technical Evaluation
Based on all inspections, we prepare a well-founded overall assessment, transparently document the device condition, and provide you with a clear recommendation for further use, repair, or replacement.
Who Our Authenticity Check Is the Right Choice For
Maintenance Personnel and Technicians
Safety before installation: verification of drives and motors to prevent unplanned downtime.
Purchasing and Procurement
Protection against incorrect purchases through technical inspection of serial numbers, condition, and authenticity.
Quality Management
Documented test results for internal quality assurance and audit purposes.
Machine and Plant Manufacturers
Reliable verification of components to safeguard customer projects and contractual commitments.
Distributors and Resellers
Transparent evaluation of device condition to enable trustworthy resale.
Learn More About Manipulation and Counterfeit Electronic Components in Our Blogs
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