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

Yaskawa USAFED-20FS2 image USAFED-20FS2 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: 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)

Yaskawa USAFED-20C22 image 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)

Yaskawa USAFED-09FB1S image 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)

Yaskawa USAFED-13CA2 image USAFED-13CA2 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
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)

Yaskawa USAFED-13FS2 image USAFED-13FS2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder, Bad Oil Seal, 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: F
With Encoder: 8192 P/R Absolute
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-03CS1 image USAFED-03CS1 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Resistance, Bad DE Bearing, Bad Encoder, Bad ODE Bearing, Bad Condition - Requires Reconditioning, Bad Power Connector
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)

Yaskawa USAFED-30FS2OE image USAFED-30FS2OE is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Encoder, Bad Encoder Bearings
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)

Yaskawa USAFED-13FA2 image USAFED-13FA2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing, Bad Condition - Requires Reconditioning, Worn ODE Housing, Bad Feed Back Connector
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)

Yaskawa USAFED-09FS1 image USAFED-09FS1 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad ODE Bearing, Bad Condition - Requires Reconditioning
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)

Yaskawa USAFED-13C22 image USAFED-13C22 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Demagnetized Rotor, 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: C
With Encoder: 8192 P/R Incremental
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-09C21S image USAFED-09C21S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad Encoder Bearings, Bad ODE Bearing, Bad Condition - Requires Reconditioning, Worn ODE Housing
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: With oil seal
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-13CS2 image USAFED-13CS2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad Encoder Bearings, Bad Power Connector, Bad Condition - Requires Reconditioning, Worn ODE Housing, Bad Coil Resistance
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)

Yaskawa USAFED-20FB2 image USAFED-20FB2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Feed Back Connector, Bad ODE Bearing, Bad Condition - Requires Reconditioning
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)

Yaskawa USAFED-13CB2OE image USAFED-13CB2OE is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires 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: C
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)

Yaskawa USAFED-30CA2 image USAFED-30CA2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad Encoder Bearings, Bad ODE Bearing, Bad Condition - Requires Reconditioning, 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: 6000 pulses/rev Incremental
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-03CS1S image USAFED-03CS1S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad ODE Bearing, Bent Shaft, Incorrect Feed Back Alignment
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)

Yaskawa USAFED-30C22SE image USAFED-30C22SE is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing, Bad Condition - Requires Reconditioning, Worn Brake Needs Reconditioning, Worn ODE Housing, Bad Encoder Bearings
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

Yaskawa USAFED-09DA1S image USAFED-09DA1S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad ODE Bearing, Incorrect Feed Back Alignment, Bad Condition - Requires Reconditioning, Bent Shaft
Servomotor Type: US
Series: F Series
Enclosure: Totally-enclosed, Self-cooled Type
Magnet Type: Ferrite
Motor Output: 0.9kW (1.1HP)
Design Revision Order: D
With Encoder: 6000 pulses/rev Incremental
Shaft Type: Taper
Drive End Specification: With oil seal
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-09FA1 image USAFED-09FA1 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad ODE Bearing, Bad Power Connector
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: 6000 pulses/rev Incremental
Shaft Type: Taper
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-30FS2 image USAFED-30FS2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad ODE Bearing, Bad Condition - Requires Reconditioning, 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: None
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-13FA2K image USAFED-13FA2K is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation - Due to Coolant/Moisture Contamination, Bad Coil Resistance, Bad DE Bearing, Bad ODE Bearing, Bad Power Connector
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: With keyway
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-20FB2T image USAFED-20FB2T is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder Bearings, Bad ODE Bearing, Bad Oil Seal
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: With keyway & oil seal
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-03DA1S image USAFED-03DA1S 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: D
With Encoder: 6000 pulses/rev Incremental
Shaft Type: Taper
Drive End Specification: With oil seal
Opposite Drive End Specification: Standard (blank)

Yaskawa USAFED-30CS2 image USAFED-30CS2 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad ODE Bearing, Bad Oil Seal, Bad Power Connector, Bad Condition - Requires Reconditioning, 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 Absolute
Shaft Type: Straight
Drive End Specification: None
Opposite Drive End Specification: Standard (blank)