At Precision Zone, we specialize in Okuma product repairs which include a wide range of AC Servo drives. One of the many types of servos we service is the Okuma BDU series servo.

Commonly found on Okuma’s LB15 and LC30 turning centers, this single axis servo drive continues to deliver precision and power even today. Ranging from 15 amp output up to 75 amps, this drive delivers reliable and efficient power over a few select output capacities. These BDU-A type amps are most often seen with Okuma 5000 control.

Our team of repair technicians evaluate and test each BDU drive in our custom built simulator.

When assessing the functionality of a Okuma BDU Servo Drives, our highly skilled repair team of engineers and technicians employs a basic four step troubleshooting process:

• 1. Visual Overview
• 2. Static Test
• 3. Checks Under Power
• 4. Alarm Codes Verification

This overview is Precision Zone’s basic troubleshooting process. Once our repair team starts on the job, we use specialized and customized testing fixtures, Huntron trackers, signal generators, oscilloscopes, milli and mega ohm meters, as well as any other necessary tools we have available to assure quality repair work. Most importantly, every repair is fully tested in our custom-built simulators under load with a motor to replicate real-life working environment.

Precision Zone goes as far as using heating chambers and overnight dynamic testing, when applicable, to guarantee performance of the repaired product when it arrives back with the customer.

Repair Process for Okuma BDU Servos

Visual Overview

When conducting a visual check, the technician inspects the drive for any mechanical damage to the drive itself and any printed circuit boards. The technician then proceeds to verify connections are tight and correct inside the drive and there are no loose screws, wires or debris. Additionally, the unit is checked for any burn marks on the components, printed circuit boards or chassis. During the visual inspection, excessive dirt on cooling components is noted as well as the functionality of the heat sink.

Basic Static Check

Output Module Testing

Precision Zone repair technicians use digital multimeters with diode testing capabilities and also take resistance measurements to conduct a static test. For these units in particular, our team of technicians uses the diode function of the multimeter as well as huntron devices to check the output modules.

The capacitor values on the PCBs are verified and any relays, contactors or circuit breakers in the drive are examined to ensure proper functionality.

Checks Under Power and Alarm Code Verification

Upon successfully passing all visual and static checks, the drive is tested under power. Any reported alarm codes are verified and if no alarms are present or once the drive has been fully repaired, the drive is tested in our Okuma series simulator. Alarms and drive status can be verified on the LEDs directly on the servo pack.

On the BDU servo packs, there are a handful of red and yellow LEDs to display alarm status. A single green LED (PSON) shows power is supplied to the control board. The yellow LEDs serve as warnings, while the red LEDs display specific alarms. See the following table for detailed descriptions of the alarms.

In order to make sure that your business keeps going, Precision Zone offers free technical support on any component that you may be having issues with. For more information on troubleshooting the Okuma BDU AC Servo Drives or for any other machine related issues, please contact us via phone at 800-551-4420 or email at repair@precisionzone.com for further assistance.

Precision Zone Repair Benefits for Okuma BDU AC Servo Drives

• Free evaluation by expert technicians include:
• Visual Inspection
• Static Check
• Power Tests
• Free Job Estimate
• 12 month warranty on our parts and labor
• Flat Price
• Exchange Options
• Rush Service Options

Contact Us To Start Your Repair Today!