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- We offer for this displayed device sale, exchange and repair services.
- Prices for Servo-/Spindle Drives Power Supplies are standard prices for standard repair
- Devices for sell or exchange, was preventively overhauled in our workshop.
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Detailed information about Mitsubishi Spindle Drives
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
- Device category: Spindle Frequency Inverter (Transistor Inverter)
- Series/Class: FREQROL-SF, 200-V class
- Design: compact, forced-air cooled, service-friendly
Model designation
- FR = FREQROL series (Mitsubishi frequency inverter)
- SF = Spindle Frequency Inverter
- 2 = 200-V class
- 11K = Rated power 11 kW
Technical Data
| Feature | Value |
|---|
| Manufacturer | MITSUBISHI ELECTRIC |
| Device type | Spindle frequency inverter |
| Voltage class | 2 |
| Rated power | 11 kW |
| Input voltage (AC) | 3-phase, 200–230 V AC (50/60 Hz) |
| Output voltage (AC) | Max. 200 V AC (variable) |
| Output current (rated) | approx. 55 A |
| Control method | Digital Closed Loop, Vector Control, PWM Inverter |
| Application | High-speed spindles in CNC machines (Mazak, Traub, Mori Seiki etc.) |
| Status | Discontinued (EOL) |
Connections & Interfaces
- L1/L2/L3: Mains input (3~ 200–230 V)
- U/V/W: Output to spindle motor
- CN1/CN2: Control connections (RUN, STOP, ALARM RESET)
- BR+ / BR-: Connection for braking resistor
- PE: Protective earth connection
- LED/Display unit: Display of operating states and alarm codes
- Analog inputs: Speed setpoint 0–10 V or 4–20 mA
Control board / Assemblies
- Main control board: digital controller and logic unit
- Power module: IGBT power stage with DC link capacitors
- Gate driver board for switching transistors
- Rectifier and EMC filter
- Fan and thermal monitoring unit
Alarms & Troubleshooting
| Code | Bezeichnung | Typischer Befund | Prüfung | Abhilfe |
|---|
| 01 | Overcurrent (OC) | Short circuit in the motor or IGBT damage | Check output U/V/W | Eliminate short circuit, replace module |
| 02 | Overvoltage (OV) | Feedback from spindle | Measure DC link voltage | Check braking resistor |
| 03 | Undervoltage (UV) | Mains voltage too low | Check input voltage | Stabilize power supply |
| 04 | Overheating (OH) | Fan failure or contamination | Check airflow | Clean or replace fan |
| 05 | Overload (OL) | Continuously too high load current | Measure current consumption | Reduce load, check parameters |
| 06 | Earth fault (GF) | Insulation fault in the motor | Insulation measurement | Repair motor cable |
| 07 | CPU/Board error | Control board defective | Self-test/Reset | Replace board |
| 08 | Communication error | CN line interrupted | Check cable/connector | Repair connection |
| 09 | Brake fault | External resistor defective | Check resistor | Replace |
| 10 | Fan error | Stoppage or blockage | Visual inspection | Replace fan |
Typical applications
- CNC milling machines and turning centers
- High-speed spindles up to 400 Hz
- Precision machines in tool and mold making
- Production systems with high torque requirements
Service notes
- Regular cleaning of fans, filters and cooling fins
- Replace capacitors and fans every 5–7 years
- Save parameters before making changes
- No insulation measurement when installed
- Check grounding and potential equalization regularly
Repair description
- Input check: Visual inspection, measurement of input and output voltages, insulation test
- Disassembly & cleaning: Removal of assemblies, removal of dust and oxidation, visual inspection for thermal damage
- Analysis: Testing of the IGBT output stage, capacitors, gate driver, control logic and fan unit
- Repair: Replacement of defective components, rework of solder joints, preventive replacement of electrolytic capacitors and fans
- Testing & load test: Functional test on the test bench with spindle motor, control of current and voltage values, evaluation of the protection circuits
- Endurance test & conclusion: Continuous operation under realistic load, thermal monitoring, final report with measurement results and test mark