top of page

Expert Servo Drive Motor Feedback Repair Services

Is your servo drive reporting encoder errors, resolver faults, or other motor feedback problems? Inaccurate or missing feedback signals can cause positioning errors, instability, loss of control, and even complete system shutdowns. ROC Industrial specializes in diagnosing and repairing servo drive motor feedback problems. We offer fast, reliable, and cost-effective solutions to restore precise motion control to your equipment.


Understanding Servo Drive Motor Feedback


Servo drives rely on feedback devices, typically encoders or resolvers, to accurately track the motor's position, speed, and direction. This closed-loop feedback system is essential for precise motion control. The drive compares the actual motor position (from the feedback device) to the commanded position and makes constant adjustments to ensure accuracy.


Types of Motor Feedback Devices


  • Encoders: Digital devices that provide precise position and speed information. There are two main types:Incremental Encoders: Provide relative position information.
    Absolute Encoders: Provide absolute position information, even after power loss.

  • Resolvers: Analog devices that are known for their robustness in harsh environments (high temperatures, vibration, contamination). They provide analog position information.

  • Hall Effect Sensors: Used primarily for commutation in brushless servo motors, providing basic position information for motor control.


Common Causes of Motor Feedback Problems


  • Encoder/Resolver Failure: The feedback device itself can fail due to wear, contamination, electrical damage, or mechanical damage.

  • Wiring/Connection Issues: Loose wires, damaged cables, or corroded connectors can disrupt the feedback signal.

  • Signal Interference: Electrical noise or electromagnetic interference (EMI) can corrupt the feedback signal, especially with analog resolvers.

  • Mechanical Problems: Misalignment of the encoder/resolver, slippage on the motor shaft, or damage to the mounting hardware.

  • Parameter Errors: Incorrect encoder/resolver parameters in the servo drive configuration.

  • Drive Component Failure: A faulty component within the servo drive itself can prevent it from processing the feedback signal correctly.


Servo Drive Brands We Service (Feedback Problems)


We repair motor feedback problems on all major servo drive brands, including:


  • Allen-Bradley

  • Fanuc

  • Siemens

  • Yaskawa

  • Mitsubishi Electric

  • Schneider Electric

  • ABB

  • Omron

  • Delta

  • Beckhoff

  • B&R Industrial Automation

  • Lenze

  • Indramat (now Bosch Rexroth)

  • Kollmorgen

  • Parker

  • Emerson


Our Servo Drive Motor Feedback Repair Process


  1. Free Evaluation & Quote: Describe the problem, including any error codes, and your servo drive and motor models. We provide a free quote.

  2. Shipping: Ship the drive (and motor, if requested) to our facility.

  3. Diagnosis: Our technicians use specialized diagnostic equipment, including oscilloscopes, encoder testers, and manufacturer-specific software, to isolate the feedback problem. This may involve:Testing the encoder/resolver signals.
    Inspecting wiring and connections.
    Checking for mechanical issues.
    Verifying drive parameters.

  4. Repair/Replacement: We perform the necessary repairs, which may include:Replacing the faulty encoder or resolver.
    Repairing or replacing damaged wiring or connectors.
    Adjusting or replacing mechanical components.
    Reconfiguring drive parameters.
    Repairing faulty components within the servo drive.

  5. Testing & Quality Assurance: We thoroughly test the repaired drive and feedback system, often using a dedicated servo motor test stand and a compatible controller, to ensure accurate feedback and proper operation.

  6. Fast Turnaround: Minimize downtime.

  7. Warranty: We offer a comprehensive warranty.


Why Choose ROC Industrial for Servo Drive Feedback Repair?


  • Expert Technicians: Our team has extensive experience with servo systems and feedback devices.

  • Advanced Diagnostic Tools: We use specialized equipment to quickly pinpoint the problem.

  • Genuine or Equivalent Parts: We use high-quality replacement encoders, resolvers, and other components.

  • Fast Turnaround Times: Minimize downtime.

  • Cost-Effective Solutions: Repair is often significantly cheaper than replacing the drive or motor.

  • Comprehensive Warranty: We stand behind our work.


Restore Precise Motion Control to Your System!


Contact ROC Industrial for a free quote and expert servo drive feedback repair services.

bottom of page