Motors-AC Servo Yaskawa SGMGV Sigma 5 | Repairs Precision Zone

Our Team Expertly Repairs Yaskawa AC Servo Motor Sigma 5 Series

Precision Zone specializes in Yaskawa product repairs servicing a wide range of AC Servo series such as Yaskawa SGMGV Sigma 5 Series Motors.

The Sigma Five Series from Yaskawa is a step above the sigma two and three but similar in several including the way they interface with SigmaWin+. The SGMGV series is versatile and it’s an excellent option when retrofitting machines. This series is equipped with an absolute encoder standard or maybe equipped with an incremental encoder depending on the demands of the machine. Yaskawa servo motors allow precise movement at high speed with repeatable results. As motion control technology continues to evolve Yaskawa is a leader in motion controls. The SGMGV series of motors is used in a wide range of applications including CNC machines, factory automation and 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 SGMGV SIGMA 5 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 0.1-0.8 Ohm’s
U	W	Approximately 0.1-0.8 Ohm’s
V	W	Approximately 0.1-0.8 Ohm’s

Reading should be balanced across all three phases. These readings will vary depending on the kW size of the motor.

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 5 Series Servopack will display when the SGMGV Sigma 5 Series Motors have a problem are the following. These codes displayed are:

Alarm Code	Code Type
100	Overcurrent
510, 511, 520	Overspeed
710, 720, 730, 731	Overload
800s and Cs	Encoder

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

SGMGV-1ED3A6C is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Incorrect Feed Back Alignment
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 15kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: With 24VDC holding brake
Control: Standard

SGMGV-44D3A61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad DE Bearing, Worn DE Housing
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 4.4kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-44DDA61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Encoder, Incorrect Feed Back Alignment
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 4.4kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Incremental
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-75ADA21 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Incorrect Feed Back Alignment
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 7.5kW
Power Supply Voltage: 200VAC
Serial Encoder: 20-bit Incremental
Design Revision Order: Standard
Shaft End: Straight without key
Options: Without options
Control: Standard

SGMGV-30ADA6S 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, Broken DE Housing, Broken ODE Housing, Full of Oil Inside, Incorrect Feed Back Alignment
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 2.9kW
Power Supply Voltage: 200VAC
Serial Encoder: 20-bit Incremental
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Wtih oil seal
Control: Standard

SGMGV-09D3A61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Encoder, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Bad Encoder Cover
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 850W
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-30D3A61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Incorrect Feed Back Alignment
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 2.9kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-55D3A6C is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Broken DE Housing, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Bad Power Connector
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 5.5kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: With 24VDC holding brake
Control: Standard

SGMGV-1AD3A61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Incorrect Feed Back Alignment
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 11kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-75D3A61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Bad Power Connector, Worn ODE Housing
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 7.5kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-13ADA61 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, Bad Power Connector
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 1.3kW
Power Supply Voltage: 200VAC
Serial Encoder: 20-bit Incremental
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-30D3A6C is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Worn Brake Needs Reconditioning, Bad Encoder
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 2.9kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: With 24VDC holding brake
Control: Standard

SGMGV-75D3A6S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Broken Magnets on Rotor
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 7.5kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Wtih oil seal
Control: Standard

SGMGV-09A3A6S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 850W
Power Supply Voltage: 200VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Wtih oil seal
Control: Standard

SGMGV-1AD3A6S 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: SGMGV Sigma V High-torque type
Rated Output: 11kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Wtih oil seal
Control: Standard

SGMGV-1AD3A6C is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Brake, Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad Feed Back Connector, Bad ODE Bearing, Bad Power Connector, Missing parts/components, Worn Brake Needs Reconditioning, Worn DE Housing, Worn ODE Housing
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 11kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: With 24VDC holding brake
Control: Standard

SGMGV-13ADA6S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 1.3kW
Power Supply Voltage: 200VAC
Serial Encoder: 20-bit Incremental
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Wtih oil seal
Control: Standard

SGMGV-44D3A6C is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Bad Power Connector, Worn Brake Needs Reconditioning
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 4.4kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: With 24VDC holding brake
Control: Standard

SGMGV-09ADA6S is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Passed Testing - Highly Recommend Recondition
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 850W
Power Supply Voltage: 200VAC
Serial Encoder: 20-bit Incremental
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Wtih oil seal
Control: Standard

SGMGV-09ADA61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Coil Insulation, Bad Coil Insulation - Due to Coolant/Moisture Contamination, Bad DE Bearing, Bad ODE Bearing, Bad Power Connector
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 850W
Power Supply Voltage: 200VAC
Serial Encoder: 20-bit Incremental
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-13D3E61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 1.3kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: E
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-44A3A61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Incorrect Feed Back Alignment
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 4.4kW
Power Supply Voltage: 200VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-55D3A61 is an
Motors-AC Servo manufactured by Yaskawa
Discovered issues: Bad Condition - Requires Reconditioning, Bad DE Bearing, Bad ODE Bearing, Bad Stator Laminations, Broken DE Housing, Broken ODE Housing
Servomotor Type: SGMGV Sigma V High-torque type
Rated Output: 5.5kW
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: Without options
Control: Standard

SGMGV-05D3A6C 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: SGMGV Sigma V High-torque type
Rated Output: 450W
Power Supply Voltage: 400VAC
Serial Encoder: 20-bit Absolute
Design Revision Order: Standard
Shaft End: Straight with key and tap
Options: With 24VDC holding brake
Control: Standard