Motors-AC Servo Yaskawa SGMPH Sigma 2 | Repairs Precision Zone

Our Team Expertly Repairs Yaskawa AC Servo Motor SGMPH Sigma 2 Series

Precision Zone specializes in Yaskawa product repairs servicing a wide range of AC Servo series such as Yaskawa SGMPH Sigma 2 Series Motors.

The Sigma Two Series from Yaskawa was next in line following the long lasting service life of the sigma one series. Motion control technology continues to evolve and Yaskawa has been a leader in motion controls since the 1980’s. The SGMPH series of motors where used in smaller applications such as EDM machines. This series can be equipped with either an incremental or absolute encoder depending on the demands of the machine. Yaskawa servo motors allow precise movement at high speed with repeatable results.

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 SGMPH Sigma 2 SERVO MOTOR

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	Multimeter Negative Lead	Resistance Check
U	V	Approximately 0.4-2.2 Ohm’s
U	W	Approximately 0.4-2.2 Ohm’s
V	W	Approximately 0.4-2.2 Ohm’s

Reading should be balanced across all three phases.

Mega Ohm Testing

Mega Ohm Meter Negative Lead	Mega Ohm Meter Positive Lead	Insulation Check
Ground	U V W	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-5000EX 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 Sigma 2 Series Servopack will display when the SGMPH Sigma 2 Series Motors have a problem are the following. These codes displayed are :

Alarm Code	Code Type
A.10	Overcurrent
A.51	Overspeed
A.71	Overload: High Load
A.72	Overload: Low Load
A.80	Absolute Encoder Error
A.81	Absolute Encoder Backup Error
A.84	Absolute Encoder Data Error
A.82	Absolute Encoder Checksum Error
A.C9	Encoder Communications Error
A.00	Absolute data error

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

SGMPH-02AAE4B is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing, Worn ODE Housing
Servomotor Type: SGMPH Sigma II
Rated Output: 200W (0.25HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard with 90VDC Brake

SGMPH-08DAA61D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing, Bad Power Connector
Servomotor Type: SGMPH Sigma II
Rated Output: 750W (1.0HP)
Power Supply: 400V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: A
Shaft End Specifications: Straight with key and tap
Accessories: Standard

SGMPH-01AAE41 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMPH Sigma II
Rated Output: 100W (0.13HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-04DAA61D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing
Servomotor Type: SGMPH Sigma II
Rated Output: 400W (0.5HP)
Power Supply: 400V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: A
Shaft End Specifications: Straight with key and tap
Accessories: Standard

SGMPH-02BAE41D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMPH Sigma II
Rated Output: 200W (0.25HP)
Power Supply: 100V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-04AAA41 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing
Servomotor Type: SGMPH Sigma II
Rated Output: 400W (0.5HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: A
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-15AAE41D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMPH Sigma II
Rated Output: 1.5kW (2.0HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-01BAA41 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMPH Sigma II
Rated Output: 100W (0.13HP)
Power Supply: 100V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: A
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-04DAA6CD is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Resistance, Bad DE Bearing, Bad Encoder Bearings, Bad ODE Bearing
Servomotor Type: SGMPH Sigma II
Rated Output: 400W (0.5HP)
Power Supply: 400V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: A
Shaft End Specifications: Straight with key and tap
Accessories: Standard with 24VDC Brake

SGMPH-02A1A61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMPH Sigma II
Rated Output: 200W (0.25HP)
Power Supply: 200V
Encoder Specifications: 16-bit (16384 x 4) Absolute Encoder
Design Revision Order: A
Shaft End Specifications: Straight with key and tap
Accessories: Standard

SGMPH-15A1E4CD is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Worn Brake Needs Reconditioning
Servomotor Type: SGMPH Sigma II
Rated Output: 1.5kW (2.0HP)
Power Supply: 200V
Encoder Specifications: 16-bit (16384 x 4) Absolute Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard with 24VDC Brake

SGMPH-08AAE4CD is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMPH Sigma II
Rated Output: 750W (1.0HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard with 24VDC Brake

SGMPH-15AAA41 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Encoder Cover, Bad ODE Bearing, Bad Encoder Bearings
Servomotor Type: SGMPH Sigma II
Rated Output: 1.5kW (2.0HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: A
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-01AAE4SD is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Winding Overheated
Servomotor Type: SGMPH Sigma II
Rated Output: 100W (0.13HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard with Shaft oil seal

SGMPH-08AAE41D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning
Servomotor Type: SGMPH Sigma II
Rated Output: 750W (1.0HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-04AAE41D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder, Bad ODE Bearing
Servomotor Type: SGMPH Sigma II
Rated Output: 400W (0.5HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-08AAA41 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing, Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMPH Sigma II
Rated Output: 750W (1.0HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: A
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-08A4A6S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation - Due to Coolant/Moisture Contamination, Bad DE Bearing, Bad Encoder, Bad ODE Bearing
Servomotor Type: SGMPH Sigma II
Rated Output: 750W (1.0HP)
Power Supply: 200V
Encoder Specifications: 13-bit
Design Revision Order: A
Shaft End Specifications: Straight with key and tap
Accessories: Standard with Shaft oil seal

SGMPH-01B1E41D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing
Servomotor Type: SGMPH Sigma II
Rated Output: 100W (0.13HP)
Power Supply: 100V
Encoder Specifications: 16-bit (16384 x 4) Absolute Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-01AAE4CD is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing, Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMPH Sigma II
Rated Output: 100W (0.13HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard with 24VDC Brake

SGMPH-04AAE4CD is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Worn Brake Needs Reconditioning
Servomotor Type: SGMPH Sigma II
Rated Output: 400W (0.5HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard with 24VDC Brake

SGMPH-02AAE41D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad Encoder Cover, Bad ODE Bearing, Worn ODE Housing
Servomotor Type: SGMPH Sigma II
Rated Output: 200W (0.25HP)
Power Supply: 200V
Encoder Specifications: 13-bit (2048 x 4) Incremental Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-02A1E41D is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Bad ODE Bearing
Servomotor Type: SGMPH Sigma II
Rated Output: 200W (0.25HP)
Power Supply: 200V
Encoder Specifications: 16-bit (16384 x 4) Absolute Encoder
Design Revision Order: IP67 Waterproof specification
Shaft End Specifications: Straight with key
Accessories: Standard

SGMPH-04A1AJ12B is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Power Connector, Bad DE Bearing, Bad ODE Bearing, Bad Condition - Requires Reconditioning, Worn Brake Needs Reconditioning
Servomotor Type: SGMPH Sigma II
Rated Output: 400W (0.5HP)
Power Supply: 200V
Encoder Specifications: 16-bit (16384 x 4) Absolute Encoder; Standard
Revision Level: Standard
Gear Type: Standard backlash gear
Gear Ratio: 1/5
Shaft Specifications: Straight shaft without keyway
Accessories: Standard with 90VDC Brake