Motors-AC Servo Yaskawa USAFED | Repairs Precision Zone

Our Team Expertly Repairs Yaskawa AC Servo Motor USAFED Series

Precision Zone specializes in Yaskawa product repairs servicing a wide range of AC Servo series such as Yaskawa USAFED Series Motors.

The USAFED series achieves high accuracy, quick response control under any environmental condition, and smooth, powerful operation even at low-speed range. Several different series of drives utilized the USAFED motor in its motion control system including factory automation and a wide range of CNC machines. This motor series is what started Yaskawa’s legacy in motion controls.

When assessing the functionality of a motor, our engineering team typically conducts a six-step check:

Visual Overview Check
Static Test
Back EMF
Feedback Check
Alarm Code Troubleshooting
Disassembly and Cleaning

This overview is Precision Zone’s basic troubleshooting process. Once our repair team starts on the job we use specialized, customized test fixtures, SKF Baker AVAIV-4, Huntron tracker, signal generator, oscilloscope, milli and mega ohm meters and other necessary tools to assure quality repair. Most importantly, every repair is fully tested in custom-built simulators under load to replicate real-life working environment.

REPAIR EVALUATION PROCESS FOR USAFED SERVO MOTORS

Visual Overview Check

When conducting a visual check, the technician inspects the motor for any mechanical damage to the power connecter, junction box, rotor shaft, oil seals and encoder covers. During the visual inspection the technician notes excessive dirt, oil or grease on cooling fans and all other parts of the motor.

Static Test Basic

Precision Zone repair technicians use an SKF Baker Advanced Winding Analyzer to fully evaluate the stator winding. The SKF Baker performs a wide range of electrical tests, including surge, DC hipot, meg-Ohm and winding resistance tests. In the instance of winding resistance each phase is tested with each other; and the mega ohm readings should be no less than 300 mega ohms.

Winding Resistance Testing

Multimeter Positive Lead	U
Multimeter Negative Lead	V
Resistance Check	Approximately 0.13-2.9 Ohm’s

Multimeter Positive Lead	U
Multimeter Negative Lead	W
Resistance Check	Approximately 0.13-2.9 Ohm’s

Multimeter Positive Lead	V
Multimeter Negative Lead	W
Resistance Check	Approximately 0.13-2.9 Ohm’s

Reading should be balanced across all three phases.

Mega Ohm Testing

Mega Ohm Meter Negative Lead	Ground
Mega Ohm Meter Positive Lead	U V W
Insulation Check	Must be above 300 Mega Ohms

Back EMF Check

If a servo motor passes the static checks it will be back driven and have the back EMF checked. With our in house magnetizing service we can bring back to life servo motors with weak magnets.

Feedback Check

Repair technicians can test encoders in a number of different ways. Our Mitchell Electrics TI-5250 system can be used to read, write and record encoder count and data information. We have Mitchell Electrics TI-5250 systems that can be used to see live encoder pulses on an oscilloscope. Connecting encoders directly to the manufacture’s drive is another way we can verify if an encoder is working correctly.

Alarm Codes Troubleshooting

Alarms that the CACR-IR/HR/SR Servopack will display when the USAFED Series Motors have a problem are the following. These codes displayed are :

Alarm Code	Code Type
1	Overcurrent
5	Overspeed
0	Absolute Error
8	Position Error
C	PG Disconnection
J	Overflow
L	Overrun

Disassembly and Cleaning

All motors are fully dissembled washed and baked. Rotors are checked for bent shafts and bearing journal common problems. The stator winding is rechecked after the baking process. Holding brakes are refurbished and the holding torque is checked. Both the drive end and opposite drive end housing bearing surfaces are checked. Once the evaluation is completed a computer report is generated with all the findings.

Recently Repaired Products

USAFED-09FB1S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 0.9kW (1.1HP)
Design Revision Order: F
With Encoder: 5000 pulses/rev Incremental
Shaft Type: Taper
Drive End Specification: With oil seal
Opposite Drive End Specification: Standard (blank)

USAFED-20C22S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Bad Encoder Bearings, Bad Power Connector, Worn DE Housing, Worn ODE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 2.0kW (2.4HP)
Design Revision Order: C
With Encoder: 8192 P/R Incremental
Shaft Type: Straight
Drive End Specification: With oil seal
Opposite Drive End Specification: Standard (blank)

USAFED-30FS2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Encoder, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 3.0kW (4.0HP)
Design Revision Order: F
With Encoder: 8192 P/R Absolute
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-13CA2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder Bearings, Bad ODE Bearing, Bad Power Connector, Incorrect Feed Back Alignment, Worn ODE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 1.3kW (1.7HP)
Design Revision Order: C
With Encoder: 6000 pulses/rev Incremental
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-13FA2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Incorrect Feed Back Alignment, Bad Encoder
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 1.3kW (1.7HP)
Design Revision Order: F
With Encoder: 6000 pulses/rev Incremental
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-30C22SE is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Worn Brake Needs Reconditioning, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder Bearings, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 3.0kW (4.0HP)
Design Revision Order: C
With Encoder: 8192 P/R Incremental
Shaft Type: Straight
Drive End Specification: With oil seal
Opposite Drive End Specification: With brake

USAFED-09C21 is an
Motors-AC Servo manufactured by Yaskawa
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 0.9kW (1.1HP)
Design Revision Order: C
With Encoder: 8192 P/R Incremental
Shaft Type: Taper
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-20FB2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation - Due to Coolant/Moisture Contamination, Bad DE Bearing, Bad ODE Bearing, Bad Power Connector, Full of Oil Inside, Broken DE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 2.0kW (2.4HP)
Design Revision Order: F
With Encoder: 5000 pulses/rev Incremental
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-30C22S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing, Bad Oil Seal, Bad Power Connector, Incorrect Feed Back Alignment
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 3.0kW (4.0HP)
Design Revision Order: C
With Encoder: 8192 P/R Incremental
Shaft Type: Straight
Drive End Specification: With oil seal
Opposite Drive End Specification: Standard (blank)

USAFED-13CS2K is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation, Bad DE Bearing, Bad ODE Bearing, Bad Power Connector, Bad Encoder, Bad Encoder Bearings
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 1.3kW (1.7HP)
Design Revision Order: C
With Encoder: 8192 P/R Absolute
Shaft Type: Straight
Drive End Specification: With keyway
Opposite Drive End Specification: Standard (blank)

USAFED-09FS1 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 0.9kW (1.1HP)
Design Revision Order: F
With Encoder: 8192 P/R Absolute
Shaft Type: Taper
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-13CS2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation - Due to Coolant/Moisture Contamination, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 1.3kW (1.7HP)
Design Revision Order: C
With Encoder: 8192 P/R Absolute
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-20C22 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 2.0kW (2.4HP)
Design Revision Order: C
With Encoder: 8192 P/R Incremental
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-03CS1S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 0.3kW (0.4HP)
Design Revision Order: C
With Encoder: 8192 P/R Absolute
Shaft Type: Taper
Drive End Specification: With oil seal
Opposite Drive End Specification: Standard (blank)

USAFED-30FS2OE is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Worn DE Housing, Worn ODE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 3.0kW (4.0HP)
Design Revision Order: F
With Encoder: 8192 P/R Absolute
Shaft Type: Straight
Drive End Specification: Without keyway when opposite drive end specification is provided; with brake
Opposite Drive End Specification: Standard (blank)

USAFED-13FB2OE is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Low BEMF, Worn DE Housing, Worn ODE Housing, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Worn Brake Needs Reconditioning
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 1.3kW (1.7HP)
Design Revision Order: F
With Encoder: 5000 pulses/rev Incremental
Shaft Type: Straight
Drive End Specification: Without keyway when opposite drive end specification is provided; with brake
Opposite Drive End Specification: Standard (blank)

USAFED-03CS1 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 0.3kW (0.4HP)
Design Revision Order: C
With Encoder: 8192 P/R Absolute
Shaft Type: Taper
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-20FS2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation - Due to Coolant/Moisture Contamination, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Worn DE Housing, Worn ODE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 2.0kW (2.4HP)
Design Revision Order: F
With Encoder: 8192 P/R Absolute
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-30C22OE is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder, Bad ODE Bearing, Worn Brake Needs Reconditioning, Worn DE Housing, Worn ODE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 3.0kW (4.0HP)
Design Revision Order: C
With Encoder: 8192 P/R Incremental
Shaft Type: Straight
Drive End Specification: Without keyway when opposite drive end specification is provided; with brake
Opposite Drive End Specification: Standard (blank)

USAFED-03FS1S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation - Due to Coolant/Moisture Contamination, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder, Bad Encoder Bearings, Bad ODE Bearing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 0.3kW (0.4HP)
Design Revision Order: F
With Encoder: 8192 P/R Absolute
Shaft Type: Taper
Drive End Specification: With oil seal
Opposite Drive End Specification: Standard (blank)

USAFED-13FS2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Encoder, Bad Coil Insulation - Due to Coolant/Moisture Contamination, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Bad Oil Seal, Worn DE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 1.3kW (1.7HP)
Design Revision Order: F
With Encoder: 8192 P/R Absolute
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-13C22S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder, Bad Encoder Bearings, Bad ODE Bearing, Bad Power Connector, Worn DE Housing, Worn ODE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 1.3kW (1.7HP)
Design Revision Order: C
With Encoder: 8192 P/R Incremental
Shaft Type: Straight
Drive End Specification: With oil seal
Opposite Drive End Specification: Standard (blank)

USAFED-13C22 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Worn DE Housing, Worn ODE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 1.3kW (1.7HP)
Design Revision Order: C
With Encoder: 8192 P/R Incremental
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

USAFED-30FA2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder Bearings, Bad ODE Bearing, Worn DE Housing, Worn ODE Housing
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 3.0kW (4.0HP)
Design Revision Order: F
With Encoder: 6000 pulses/rev Incremental
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)