Automation · Yaskawa
Yaskawa encoders for servo and spindle motors in India
Industrisol supplies Yaskawa encoders in India for servo and spindle motor repair and replacement, including the UT series UTOPH-81AWF incremental optical encoder, along with matching encoder cables.
- Replacement encoders identified by Yaskawa part number
- UT series encoders for AC servo and spindle motors
- Encoder cables in common lengths from 3 m to 20 m
- Supplied from Mumbai to customers across India
The role of an encoder in a Yaskawa servo motor
An encoder is the feedback device mounted on the back of a servo or spindle motor. It reports shaft position and speed to the drive many thousands of times per second, which is what allows a servo system to position accurately and hold speed under changing load.
An incremental encoder outputs pulses as the shaft turns, and the drive counts them from a reference point, so the axis normally needs homing after power-up. An absolute encoder reports the actual shaft position at any time, so the machine knows where it is as soon as power returns. Yaskawa servo motors use encoders designed for their specific drive, so replacements should match the original part number.
Yaskawa encoders we supply
Yaskawa UTOPH-81AWF encoder
An internal encoder from Yaskawa’s UT series, made for AC servo and spindle motors. It is a complete incremental optical encoder coupled to the motor with a plate spring, typically needed when an older Yaskawa motor shows encoder alarms or position errors.
| Part number | UTOPH-81AWF |
|---|---|
| Series | UT series, WF type, for AC servo and spindle motors |
| Type | Incremental optical encoder |
| Resolution | 8192 pulses per revolution |
| Output frequency | 200 kHz |
| Construction | Coupled with plate spring for motor (complete); aluminium body |
Encoder cable for Yaskawa servo motors
A PVC-jacketed encoder cable to connect Yaskawa servo motor encoders to the drive, offered in common lengths. This is a compatible cable; for genuine Yaskawa JZSP part numbers, see our Yaskawa cables page.
| Lengths | 3 m, 5 m, 10 m, 15 m, 20 m |
|---|---|
| Jacket | PVC |
| Use | Yaskawa servo encoder connection |
Signs an encoder needs attention
Encoder alarms on the drive
Communication, overspeed or position error alarms that return after reset often point to the encoder or its cable.
Erratic motion
Jerky movement, hunting or noise at standstill can come from damaged feedback signals.
Lost position
An axis that drifts or misses its home position may have a faulty encoder or contaminated optics.
Before replacing a Yaskawa encoder
Check the encoder cable and connectors first: a cut, crushed or loose cable is cheaper to fix than an encoder. Note the full motor model and the encoder part number from the label. Replacing an encoder usually requires the motor to be opened and the encoder aligned to the motor, so this should be done by an experienced servo repair technician. After replacement, the drive may need its absolute position or origin reset.
Information to send for an encoder quote
Not sure about some details? Send what you have — we will ask the right follow-up questions.
- Encoder part number (for example UTOPH-81AWF)
- Servo or spindle motor model number
- Drive (SERVOPACK) model
- Photos of the encoder label and connector
- Alarm codes shown on the drive
- Encoder cable length if a cable is also needed
- Quantity and delivery location
What is the UTOPH-81AWF encoder used for?
UTOPH-81AWF is a Yaskawa UT series incremental optical encoder for AC servo and spindle motors, with 8192 pulses per revolution. It is supplied as a complete encoder coupled to the motor with a plate spring, and is mainly needed to repair older Yaskawa motors.
Can I replace a Yaskawa encoder with a generic encoder?
Usually not. Yaskawa servo motors use encoders matched to the drive’s feedback format, resolution and connector. A generic encoder may not communicate with the SERVOPACK. Always replace with the same part number or a confirmed equivalent.
How do I know whether the encoder or the cable is faulty?
Check the cable for damage and test continuity and shield connection, or swap in a known good cable. If the alarm stays with the motor when the cable is changed, the encoder is the likely cause. Your drive manual lists the meaning of each encoder alarm code.
What is the difference between incremental and absolute encoders?
An incremental encoder produces pulses and the drive counts them from a home position, so homing is needed after power loss. An absolute encoder reports the actual position at power-up, which avoids homing and is preferred for multi-axis machines and robots.
How do I get a quote for a Yaskawa encoder?
Send the encoder part number, motor model and photos of the labels through Request a quote, or call +91 90433 36700. We will check availability and reply with current pricing.
Need a Yaskawa encoder or encoder cable?
Send the part number and motor model and we will quote the matching encoder or cable.