Tri Star CNC Services, LLC provides FREE technical phone support

Contact us at 815.578.9145 or use our contact form

CNC Controls/Electronic Services

FANUC CNC machine repairs are provided in-house and through phone support at Tri Star CNC.

Tri Star CNC Services LLC provides superior repair services to CNC machine customers. Our technical phone support allows us to help you solve minimal problems your machine may be experiencing when you don’t feel it is necessary to send your malfunctioning parts in. We can also tell you if the problem you are having with your CNC machine requires more attention than over the phone support.

When we receive your damaged or malfunctioning parts, our highly trained repair technicians will do an inspection to determine whether or not repairs need to be made or can be made. If your CNC machine’s FANUC parts are damaged beyond repair or you don’t have the time to wait for repairs to be made, replacement parts are available on an exchange basis. Whether you have a broken control board, servo motor, spindle motor, the power supply, or any other CNC machine component, our experienced FANUC repair technicians will turn around a perfectly functioning module in little time.

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

  1.   Impeccable service
  2.   Quick turnaround
  3.   Flawless performance

FANUC Controls/Electronic Services Available:

We also offer a wide selection of FANUC parts for sale from our exchange stock .

Machine Controls (all sub assemblies including power supplies):

If your CNC machine controls or sub-assemblies are malfunctioning, send them to our expert CNC machine repair technicians at Tri Star CNC Services, LLC. We have the experience and equipment to repair this exhaustive list of FANUC CNC modules and parts.

When we receive your malfunctioning machine controls we perform a detailed inspection to find the damaged parts which need repair or replacement. We work diligently to repair FANUC machine controls back to normal operation so they can be returned to you in a timely manner. We understand the criticality of quickly replacing machine controls, sub-assemblies, and power supplies for your CNC machines. Our qualified repair technicians can restore all of the CNC machine controls listed below:

  • FANUC 6
  • FANUC 10/11/12
  • FANUC 0 (A, B , C & i)
  • FANUC 21 & 21i
  • FANUC16i & 18i
  • FANUC 16(A, B & C) & 18(A, B & C)
  • FANUC 16i/18i/21i-Model B
FANUC Parts Serviced
Drives Motors Power Supplies
A06B-6111-H015#H550 A06B-6066-H244 A06B-6110-H015
A06B-6111-H022#H550 A06B-6058-H250 A06B-6140-H026
A06B-6078-H206#H500 A06B-6093-H152 A06B-6140-H055
A06B-6142-H015#H580 A06B-6047-H005 A06B-6110-H011
A06B-6102-H230#H520 A06B-6050-H203 A06B-6110-H037
Tool Parts Retrofits Control Boards
A06B-6114-H109 A61L-0001-0093/LCD A06B-6047-H002
A06B-6096-H207 A61L-0001-0074/LCD A06B-6047-H003
A06B-6096-H208 A61L-0001-0092/LCD A20B-1003-0010
A06B-6079-H106 A61L-0001-0094/LCD A16B-1200-0670
A06B-6096-H218#H A61L-0001-0092 A06B-6055-H103#H512

...and MUCH more.

See ALL FANUC Parts >>

FANUC Servo Drives:

Servo drives are designed to coordinate communication between the control board and the servo motor. The drive amplified the power level signal to a level that controls the servo motor. A sensor reports the status of the motor, and the drive alters the voltage frequency going to the motor to keep the motor functioning as it is intended. 

When your machine is not functioning properly, alerting you to overload alarms, or showing any other abnormal sign of operation, it should be sent into a qualified repair technician for inspection.

Our Tri Star repair technicians will do a thorough inspection of your FANUC servo drive and determine whether or not they need to be repaired. If they do not need repairs, we will clean your machine and only charge you a small fee for the inspection and cleaning. When servo drives or motors are causing the problem, we will restore them to normal operation. Our technicians will even replace other components with higher failure rates to ensure your machine will work efficiently longer. Trust Tri Star to repair or restore any of the parts listed below:

  • AC Analog
  • FANUC Alpha, Alpha i series & Alpha is series
  • FANUC AC Digital Series (S, C & D)
  • FANUC DC and DCM Series
  • Beta, Beta i, Beta is series

FANUC Spindle Drives:

Spindle drives work to maintain consistent speed and torque in a CNC machine, controlling the high speed AC motors in spindle drive applications. They minimize variation in torque and speed using digital signal processors.

When spindle motors decelerate, their spindle drive pushes electrical energy back into the line to continue power. When these parts malfunction it can result in an over current alarm or abnormal operation of your CNC machine. Untrained staff attempting to repair FANUC modules can cause serious damage to your machine and render it nonoperational.

The skilled repair technicians at Tri Star have the expertise to inspect and diagnose the problems of your FANUC spindle drive or motor. Whether your machine parts just needs a good cleaning or require repairs, our technicians will use great attention to detail to restore your spindle drive back to proper operation. Our repair technicians have the knowledge, experience, and equipment to repair all of the parts listed below:

  • FANUC Alpha, Alpha i series & Alpha is series
  • FANUC AC Digital and Analog
  • FANUC AC Serial Interface
  • FANUC AC Series i & S

Alarm Codes for Servos, Spindle Amps, PSU’s and SVPM Units

Dangerous temperatures, blown fuses, low voltage, abnormal frequencies and faulty RAM are just a few common causes of FANUC errors. Alarm codes range from generic to highly specific—even with clear documentation, identifying the root cause of the error in a FANUC robot may be problematic.


It’s no problem when you trust in Tri Star CNC Services. With many years servicing FANUC robots and their critical components, we’ve had exposure to all sorts of FANUC alarm codes and what they mean for your CNC machinery.

Give us a call and we’ll help you diagnose the component(s) at fault.

Circuit Board Repair


Tri Star CNC Services stocks several repaired units available for purchase on an exchange basis. So when you cannot wait for your machine to be repaired, we can give you a replacement in exchange for you broken unit and you can get your machine back to proper operation fast. In addition to this, Tri Star CNC Services treats all units sent in for repair as an emergency repair. On most items our turnaround time is 36 to 48 hours after receiving the approval of (quote appraisal) repairable unit. Our repair and test procedures either meet or exceed those currently established at Fanuc America.


Our expert technicians will take the utmost care in repairing your malfunctioning unit, and will return it to you operating at maximum efficiency. When FANUC machine control parts are sent in for repair, our technicians replace the high failure electrical components, along with replacing the faulty components in your machine when needed and at no cost to you. This ensures your machine will continue to operate properly for a much longer period of time. Tri Star CNC Services provide the best FANUC and CNC machine repairs and make each repair a priority so you get you units back quickly and your machine can resume normal operations.

How FANUC Robots Work: A Quick Overview

FANUC robots are issued commands from the programming language Karel, written for highly specific manufacturing/production task. Robots rely on clean code and perfectly functioning electronic components to work flawlessly. FANUC robotics rely on a network of intercommunication between programming languages, controllers and physical parts to execute a task.

Malfunctioning FANUC electronic components like servos and spindle amplifiers threaten the integrity of the process and put FANUC robots at a standstill. We’ve got the ability to repair these critical components and boast an exchange stock to help you get back into working order ASAP.


When your CNC machine has a constant need for FANUC parts replacement, ask TriStar CNC what we can do to keep your modules working longer. Our custom FANUC parts development allows us to engineer specific components with high failure rates used in several FANUC servo units.

Our expert technicians install higher quality replacement components with a longer mean time between failures, as compared to the components originally installed in FANUC parts. When our repair technicians are fixing FANUC parts, they automatically replace the high failure components whether or not they are the cause of the original failure. If the smaller components of your CNC modules fail regularly, it may be more cost effective to have us look for a better solution. Between engineering better performing FANUC part solutions at lower prices and proactively replacing high failure rate components in the parts our technicians repair, we offer the best repair services and solutions for CNC machine FANUC parts.

TriStar has custom engineered:

LCD replacement screens to retrofit a variety of controls for CRT displays using: the A61L-0001-0094 14” Color CRT, the A61L-0001-0074 14” color CRT, and the A61L-001-0096 14” color CRT

The LCD displays engineered are “drop in replacements” and require no modification to controls


We provide the best value in the market place for all CNC/FANUC parts and repairs. Our prices are usually lower than other FANUC parts and repair centers, and we provide the best warranty for our repaired and exchanged parts! Tri Star CNC Services goes further than other FANUC repair companies to deliver the greatest possible value, even custom engineering replacement FANUC parts at significant savings over original manufacturer parts, and proactively replacing high failure rate components before they fail. Please check on price, lead times, and availability on our "Parts" tab.


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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