Unit/PCB Repair – Servo and Spindle Drives

GE FANUC repair services provided by CNC parts supplier

FANUC Component Servicing

Tri Star CNC Services provides quick and affordable repairs of servo and spindle drives for CNC machines worldwide. Servo amplifiers must work flawlessly for precision CNC machining. When a servo drive fails, you need it repaired—fast. Enter Tri Star CNC Services. We provide many repair services for CNC machine’s component level parts.

Contact Tri Star CNC Services, LLC to ensure...

  1.   Impeccable service
  2.   Quick turnaround
  3.   Flawless performance
FANUC Servos/Spindle Amps We Service
A06B-6114-H109 A06B-6096-H206 A06B-6096-H207
A06B-6096-H208 A06B-6079-H106 A06B-6096-H218#H
A06B-6096-H106 A06B-6096-H201 A06B-6066-H244
A06B-6079-H208 A06B-6134-H203#A A06B-6134-H303#A
A06B-6096-H301 A06B-6117-H303 A06B-6117-H109

...and MUCH more.

See ALL FANUC Servos/Spindle Drives >>
A06B-6111-H015#H550 A06B-6111-H022#H550 A06B-6078-H206#H500
A06B-6142-H015#H580 A06B-6102-H230#H520 A06B-6141-H022#H580
A06B-6111-H011#H550 A06B-6111-H030#H550 A06B-6078-H311#H500
A06B-6141-H015#H580 A06B-6102-H111#H520 A06B-6102-H226#H520
A06B-6141-H030#H580 A06B-6102-H202#H520 A06B-6111-H045#H550

Servo Drive Repair

How a Servo Drive Works

A servo drive takes the command signal sent from a control panel and amplifies the low power signal up to a level which results in movement of the servo motor. As the servo motor is activated, a sensor reports the status of the motor to the servo drive via a feedback signal. The control compares what the motor is doing with the command it received and alters the voltage frequency going to the motor in order to correct any deviation from the original command.

For more specific information regarding the operation of servo drives, consult our guide on how servo drives work, or contact our experienced professionals at Tri Star CNC at 815-578-9145.

Common Symptoms of a Malfunctioning Servo

With enough years of operation, and wear and tear, even the highest quality servo drives will need maintenance or repairs. FANUC’s DC servo drives commonly exhibit the following errors:

  • Erratic operation and vibration
  • Failure of detection circuits
  • Blown fuses
  • Malfunctioning OVC and HC alarms

FANUC AC servo drives can fail for a wide variety of reasons. No matter the problem, Tri Star CNC has the parts and the expertise to correct it.

Spindle Drive Repair

Spindle Amplifier Operation
CNC machine repair services provided by Tri Star CNC

A spindle drive controls the high-speed, compact AC motors commonly used in machine tool spindle drive applications. Since maintaining consistent speed and torque is essential to accuracy and finish quality, these devices use digital signal processors to constantly monitor and adjust speed, torque and current to minimize variations in speed and torque during use.

Spindle Amplifier Problems

Any hiccup due to component error compromises the effectiveness of the CNC process.

Like any equipment used in high-volume CNC applications, spindle amplifiers can develop problems which require servicing. Some common issues we see with FANUC spindle drives are erratic operation, ALM-12, no rotation, feedback failure and a wide variety of other reasons.

FANUC Drive Alarm Error Codes


Tri Star CNC Services helps you identify FANUC drive error codes and diagnose the reason for the fault. Spindle drives fail for a number of reasons: high temperatures, low voltage, abnormal current, faulty circuits, communication errors and many, many more.

Even the clearest explanation from your machine’s manual or from our own list can seem daunting to the untrained eye. Give us a call and we’ll let you know what must be done to get your CNC machinery up and running again.

Free Phone Support for Faulty FANUC Servo and Spindle Drives

If you are experiencing any issues with your precision CNC machining and suspect an issue with electronic components, contact us today. We provide free phone support to help you determine if your servo or spindle drive is malfunctioning and needs repair.

Tri Star CNC’s technicians have extensive experience repairing and refurbishing FANUC servo drives and spindle drives. We maintain a well-stocked inventory of parts necessary for overhauling these devices, so you won't have to wait long before we return a working part.

Besides diagnosing and replacing faulty components, we also replace any parts which may be nearing the end of their service life and load test the unit before returning it. We also thoroughly clean all units before sending them back.

Contact the CNC repair specialists at Tri Star CNC for expert repair of FANUC servo drives and spindle drives.
4/7/2017 How Do FANUC Robots Work? 4/7/2017
3/3/2016 How Does a Servo Drive Work? 3/3/2016
Did you know this?
Setting Zero Return on Fanuc machines or any CNC Machine can sometimes be difficult. Each builder has their own way to set zero return through their own side of the control.

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