Okuma Vac Drive Manual

  



Precision Zone Specializes in Repairs for Okuma VAC-III AC Spindle Drives The VAC-III is one of Okuma’s most popular conventional spindle drive units. With 3 powerful models, the VAC-III comes in a 6kW, 11kW and 22kW capacity. The VAC-III boasts quick, clean control signal communication through its fiber optic connection to the NC.

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  2. Okuma VAC Drive Models Listed below are just some of the Part Numbers #'s we repair, but please feel free to reach out to us at 770-956-7838 if you don't find what you.
  3. Are you having problems with your OKUMA BL-D Drive, VAC Drive or OKUMA Board? EIC is the answer to all of your needs. Maybe it isn't a drive that needs repaired, but rather an OKUMA Power Supply or an OKUMA Servo Motor that needs our attention. Whatever the need, you can rest well at night knowing we are here to help you get back up and running.

Precision Zone Specializes in Repairs for Okuma VAC-III AC Spindle Drives

The VAC-III is one of Okuma’s most popular conventional spindle drive units. With 3 powerful models, the VAC-III comes in a 6kW, 11kW and 22kW capacity. The VAC-III boasts quick, clean control signal communication through its fiber optic connection to the NC. This fiber optic connection allows for faster transmission of data and immunity from electromagnetic interference on the signals. Standard copper cables are used for encoder, resolver and winding select connections. Easy access fuse holders on the edge of the power board allow for the ability to quickly check for and replace blown fuses. With distinct, bright LEDs on the control board, the VAC-III provides easy to read LED indication for alarms and operation status.

A pair of large seven segment LEDs gives the user clear alarm and operation status read out in conjunction with the standard LED indicators. This alarm data is also transferred to the NC which displays the alarm name and alarm data on the main screen.

When assessing the functionality of an Okuma Spindle Drive, our repair team conducts a four-step evaluation:

    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.

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 VAC-III Spindles

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.

On the VAC-III unit, there are a handful of LEDs to display alarm status. The cover of the drive gives the explanations for the various status LEDs. There is a CPUALM LED that indicates an alarm. More specific information can be found from the seven-segment display LEDs along with the adjacent operation status LEDs. The M1, M2 and M3 LEDs are important to monitor as well. These three LEDs indicate faulty operation and should all be OFF for normal running operation.

Common Alarms for the Okuma VAC-III AC Spindle Drive Series

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Precision Zone's number one goal is to get you and your business back up and running as soon as possible. To acheive this goal, not only do we offer repair services for your machines, but we also offer free technical support. For more information on these alarms on the Okuma VAC-III Spindle Drive Series and all other machine related issues, please contact us for additional assistance via phone at 800-551-4420 or email at [email protected]

Discover the Precision Zone Advantage + Repair Benefits to repairing your Okuma VAC-III AC Spindle Drive with Precision Zone

  • Free Quotes and Evaluation by expert technicians
    • We have a thorough evaluation process that utilizes visual, static, and power tests to determine the failure of the product so you get a comprehensive and accurate quote. Everytime.
  • 1-Year Warranty
    • All products are covered by our comprehensive warranty. Warranty terms and conditions are product specific.

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  • Competitive Pricing
    • We know that you have many different options to go to for your repairs. However, we pride ourselves in being able to provide you with a more affordable and competitive repair option with out sacrificing the quality of service we provide.
  • Flexible Rush Repair
    • To minimize your equipment downtime, we offer mutliple rush repair options. Standard repair time is typically 1-2 weeks. Rush repair options include 3 day, 2 day, next day, and even same day repairs.

Contact Us To Start Your Repair Today!


VAC-III D6 is an
Drives-AC Spindle manufactured by Okuma
Discovered issues: Bad Capacitor(s), Bad Gate Section/Board, Bad Output Transistors/SCRs
Drive Type: VAC-III AC Spindle Drive
Rated Capacity: 6kW

Okuma Vac Drive Manual Gearbox

VAC-III D22 is an
Drives-AC Spindle manufactured by Okuma
Discovered issues: Passed Testing - Highly Recommend Recondition
Drive Type: VAC-III AC Spindle Drive
Rated Capacity: 22kW

Okuma vac drive manual transmission

Okuma Vac Drive Unit

VAC-III D11 is an
Drives-AC Spindle manufactured by Okuma
Discovered issues: Bad Output Transistors/SCRs
Drive Type: VAC-III AC Spindle Drive
Rated Capacity: 11kW