04.09.2025 by Viktor Siebert
Yaskawa USAGED-09A22T Servo Motor with UTOPH-81AVF Encoder Technical Data, Applications and Repair
A customer contacted us with an urgent issue: His CNC machine producing critical components had suddenly stopped due to a failed USAGED-09A22T servo motor.
In the past, he had regularly stocked replacement motors directly from Yaskawa. However, this series was discontinued about five years ago, leaving him only with defective spare units in his warehouse.
Since the machine was critical for production, he required an immediate solution. At industrypart, we maintain a stock of fully overhauled exchange motors, ready for exactly these emergencies. A refurbished USAGED-09A22T was available in our warehouse, fully tested and prepared. The customer arranged pickup the same day and was able to restart production without delay.
The following day, he sent several more motors of the same type for preventive overhaul. With the immediate crisis resolved, we had the time to carry out a thorough refurbishment.
Our overhaul process includes:
- Disassembly & cleaning: Motor housing disassembled, components cleaned with emulsion, oven dried.
- Bearing replacement – All bearings replaced with high-grade precision types.
- Encoder replacement : The UTOPH-81AVF encoder is replaced by a newly developed, more robust version.
- Seal & connector renewal : All consumables replaced to ensure protection.
- New paint coating: Old paint stripped, housing repainted for corrosion resistance.
- Test bench verification : Load simulation, signal quality check, long-term endurance testing.
As a result, the customer received motors that were not just repaired but restored to near new condition, ensuring years of reliable operation.
Causes of Encoder or Motor Failures
- Temperature fluctuations → condensation leads to corrosion in the encoder
- Humidity / oil mist → enters through worn seals
- Vibrations → mechanical stress damages bearings and encoder components
- Aging → natural deterioration of encoder electronics
- Cable breaks → caused by movement or poor strain relief
Failure progression: First sporadic encoder faults occur, disappear temporarily, then become more frequent until the motor finally fails completely.
Preventive Tips for Customers
- Keep the environment dry and clean
- Regularly check cables and connectors
- Minimize vibrations with proper alignment and damping
- Avoid drastic temperature changes in machine halls
- Schedule preventive overhaul every 5–7 years
Further information such as price and delivery time for the: Yaskawa USAGED-09A22T Servo Motor with Encoder
More details about our Yaskawa repair expertise can be found here: Yaskawa Repair at Industrypart
📞 Feel free to contact us if you have any questions regarding your Yaskawa drive technology.
Our team looks forward to your inquiry!
Technical Specifications
| Feature | Value |
|---|
| Model | USAGED-09A22T |
| Manufacturer | Yaskawa Electric Corporation (Japan) |
| Power (kW) | 0.85 kW |
| Torque (Nm) | 5.39 Nm |
| Rated Speed | 1500 rpm |
| Rated Current (A) | 7.6 A |
| Operating Mode | Continuous (CONT.) |
| Voltage Class | 200 VAC, 3-phase (depending on Servopack) |
| Protection Class | Fully enclosed, self-sealed (IP54/IP65 depending on version) |
| Insulation Class | F |
| Encoder | UTOPH-81AVF Incremental, 8192 p/r |
| Mounting Style | Flange mounted, straight shaft (Type “2”) |
| Weight | Approx. 9–11 kg (depending on revision) |
| Manufacturing Date | 1996 (e.g., “9602” on the nameplate) |
Application Environment & Compatible Devices
The USAGED-09A22T belongs to Yaskawa’s G-Series of servo motors and is typically used in machine tools, production systems, and CNC machining centers.
It is compatible with CACR-SR Servopacks (e.g., CACR-SR10BE12G)
Functional Description
The USAGED-09A22T is a permanent-magnet AC servo motor equipped with an incremental encoder.
It provides precise torque at low speeds and ensures accurate positioning and speed control when operated with a Yaskawa Servopack.
The UTOPH-81AVF encoder with 8192 pulses per revolution delivers high-resolution feedback signals, essential for precise machine tool operation.
Alarm Messages & Troubleshooting
| Error / Symptom | Cause | Solution |
|---|
| Motor will not start | Loose connection / wrong wiring | Check and tighten connections |
| Overheating | Ambient > 40°C, fan blocked | Cool environment, inspect fan |
| Overcurrent | Winding short circuit / bearing jammed | Insulation test, replace bearings |
| Encoder error | Moisture, cable break, aging | Replace encoder, rewire cables |
| Signal noise | Vibrations / loose connectors | Secure connectors, install damping |
| Motor runs irregularly | Phase error / incorrect encoder connection | Verify wiring, correct encoder setup |
| Bearing noise | Worn bearings | Replace bearings |
| Stops after heating up | Encoder drift due to temperature | Replace or recalibrate encoder |
| Low torque | Contamination or wrong parameter setting | Clean motor, check parameters |
| Oil/dust ingress | Damaged seals | Replace seals, schedule preventive overhaul |
Main Components of the Motor
| Component | Description |
|---|
| Rotor | Permanent magnet rotor, generates torque |
| Stator | Windings for current conduction |
| Encoder | UTOPH-81AVF, 8192 p/r, incremental type |
| Bearings | Precision ball bearings for shaft guidance |
| Housing | Fully enclosed, protects against dust and humidity |
| Connectors | Power and encoder connectors, vibration resistant |
| Seals | Prevent oil, dust, and moisture ingress |
| Shaft | Straight shaft, flange mounted |