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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 Yaskawa SGDB Servopacks
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 Yaskawa servo amplifier of the SGDB series, developed for precise control of Sigma motors. Known for its durability, high control quality and easy integration into CNC machines. Frequently used in machine tools of the 1990s and 2000s.
- Device category: AC servo amplifier (Servopack)
- Series/Class: SGDB (200-V class)
- Design: Compact power unit with ventilation, modular design, service-friendly
Model designation
- SGDB = Yaskawa Servopack for Sigma servo motors
- 10 = Rated power approx. 0.85 kW
- A = Standard version (200 V)
- D = Digital control / Standard type
- G = Basic version with analog interface
Technical Data
| Feature | Value |
|---|
| Input voltage | 3~ 200–230 V AC, 50/60 Hz |
| Input current | 8.0 A |
| Output voltage | 3~ 0–230 V AC |
| Output current | 7.1 A |
| Output power | 0.85 kW (1.14 HP) |
| Cooling | Convection/forced air cooling |
| Phases | 3 |
| Weight/Dimension | n/a |
Connections & Interfaces
- L1, L2, L3: Mains input 3~ AC 200–230 V
- U, V, W: Motor output (e.g. to SGM-08V316S)
- CN1: Control and signal interface (inputs/outputs, reference signals, alarm contacts)
- CN2: Encoder connection (incremental encoder TRD-Y2048)
- BR+ / BR–: Connection braking resistor
- PE: Ground connection, connect low-resistance
- LED display / 7-segment display: Status and error codes (A.xx, b.xx, F.xx etc.)
Control board / Assemblies
| Name | Designation on board | Quantity | Miscellaneous |
|---|
| Control board | SGDB-CAD* | 1 | Main controller board |
| Power section | Unterteil 10 | 1 | Integrated IPM/IGBT module with driver stage |
Alarms & Troubleshooting
| Code | Designation | Typical finding | Inspection | Remedy |
|---|
| A.10 | Overcurrent / Overheating | Short circuit U/V/W, IGBT defect, heat sink overheated | Check motor cables, IGBT, thermal switch | Repair servopack, check cooling |
| A.30 | Regeneration error | Braking resistor open or regeneration transistor defective | Check RB circuit | Connect resistor, check transistor |
| A.32 | Regeneration overload | Too frequent braking, RB overloaded | Monitor regeneration load | Change cycle or use larger resistor |
| A.40 | Overvoltage | DC bus > 420 V | Measure mains voltage | Stabilize power supply |
| A.41 | Undervoltage | DC bus < 170 V | Measure voltage supply | Improve supply, check supply line |
| A.51 | Overspeed | Speed > setpoint / incorrect phase sequence | Check encoder and phase sequence | Check encoder/wiring |
| A.71 | Overload (Momentary) | Overcurrent briefly > 300 % | Check current profile | Check mechanics, adjust parameters |
| A.72 | Overload (Continuous) | Permanent overload | Measure current/temperature profile | Reduce load, check motor |
| A.81 | Encoder backup error | Loss of absolute data (optional) | Check battery / supply | Replace battery, reference run |
| A.84 | Encoder data error | Signal inconsistent, bearing or moisture damage | Encoder cable, signal form | Replace encoder, cleaning |
| A.b3 | Current detection error | Motor disconnected or current sensor defective | Phase check, sensor check | Check cables, repair board |
Typical applications
- CNC machine tools (milling, turning)
- Positioning axes in industrial robots
- Feed and slide drives
- Machines with medium inertia and 750 W–1 kW axis power
Service notes
- Ventilation & Cooling: Clean regularly, remove dust
- Electrolytic capacitors & IGBTs: Replace preventively after several years of operation
- Terminals & connectors: Check for corrosion and firm seating
- Parameter backup: Back up before maintenance, restore after repair
- Grounding: Always lead low-resistance to a central point
- No megger measurement: High-voltage testing only according to manufacturer's specifications
Repair description
- Input check: Visual inspection, insulation test, DC link voltage measurement, check for short circuit in the power section
- Disassembly & cleaning: Disassemble the unit, clean the cooling surfaces and circuit boards, replace the thermal pads
- Analysis: Testing of power transistors, capacitors, gate drivers and control board SGDB-CAD*
- Repair: Replacement of defective power elements, soldering of solder joints, preventive replacement of critical electrolytic capacitors and fans
- Testing & load test: Test with reference motor (e.g. SGM-08V316S), monitoring of current, temperature and alarm reactions
- Endurance test & conclusion: Several hours of test run under full load, documentation of the measured values and creation of a test protocol