Harmonic Drive engineers and manufactures precision servo gearheads, actuators, and motors for industrial application. Though they provide standard motors, many of their products are custom-engineered to meet their client’s needs. This can make finding a replacement or getting your Harmonic Drive motor repaired an arduous and time consuming process. That’s where we come in.

Here at A&C Electric, our team of expert servo motor repair specialists have seen enough to fix even your custom-designed Harmonic Drive motor. We understand how stressful a broken motor can be, and more importantly, how much that downtime can cost you. That’s why we do everything in our power to get your motor back and working for you as quickly as possible…and all for a great price too! If you see your Harmonic Drive model in the list below, give us a call to learn how we can save you time and money today. We’re ready to answer any questions you may have, and are always happy to help. We also offer repair services for industrial motors including gear boxes and AC 3 phase motors.

Servo Lab Capabilities

We have documented 96 different Servo Manufacturer repair reports in our Database

We repair AC Servos, DC Servos, AC Spindles, and AC Actuators

Capable of 24-hour repairs in many cases

We have thousands of spare and rebuilt motors in our inventory for parts or exchange motors

Servo Lab Repair Procedures

Data

Motor nameplate data is recorded

Inspection

A visual inspection of any damage to the motor.

We check for

Damaged Leads/Terminals
Worn output shaft/keyways
Cracks in end bells or covers

Job Ticket

We complete to full write up off all motor data

Including

All winding tests (Resistance, Meg Ω, Continuity)
All bearing sizes
All seal sizes
Brake torque tests (Record Torque, winding resistance)
Feedback Tests (Tachometer/Encoder)

Motor Disassembly

Bearing and seal sizes are recorded
Bearing fits are measured on shaft and End bell
Brake torque is measured as well as resistance and Meg Ω
More winding tests are performed (Surge and HiPOT tests)
Stator is then washed and baked in oven
Magnets are inspected for cracks or if loose on shaft
Encoder is tested with either (Heidenhain PWM20, Sick PGT-11, or Mitchell Electronics equipment)

Assembly

New bearings are installed
New seals are installed
If required, new windings are impregnated
Brakes are rebuilt or replaced depending on manufacturer design.
Rebuilt or New encoders are installed and aligned using:
(Heidenhain PWM20, Sick PGT-11, or Mitchell Electronics equipment)

Rotor Balancing and Testing

Rotor is run through a full vibration diagnostic

Run Testing

Every Motor is Run for a minimum of 1 hour using one of our drives.
We use Siemens S110, S120, IndraDrive, AB Kinetix 300, Yaskawa 7, and AMC drives

Service Report

A Final 3-page Service Report is filled out
Pinout diagram for power and feedback is provided
Brake torque is recorded a final time for our Service Reports
A photo of nameplate and motor is attached
A motor tag is installed on motor with QR code linking Service Report and Job Histories
If requested, a YouTube link is attached to the service report of motor

Electrical Apparatus Service Association

A&C Electric is a certified distributor service center.