29.04.2025 by Viktor Siebert
Interesting Information about the Okuma MIV0303-1-B1 Servo Drive
In this post, we have compiled interesting and helpful information about the Okuma MIV0303-1-B1 servo drive unit (Order No. 1006-2229). Our goal is to provide you with a comprehensive overview and quick service for anyone seeking information.
Quick Repair – A Practical Example from Our Workshop
Recently, we encountered a unique repair case: A customer brought us a defective Okuma MIV0303-1-B1 unit, where the L-axis briefly operated and then triggered Alarm 13. The unit was brought in for express repair.
Thanks to our experience, we immediately recognized the fault and could easily replicate it on our test machine (Okuma MX-45VAE). The complete repair, including overhaul, thorough testing, washing, and drying, took less than 24 hours. The customer’s machine is now running smoothly again.
Systematic Procedure – Immediate Fault Diagnosis
A particular advantage of our approach is the precise documentation of known faults and their causes. Once we receive a device, it undergoes preliminary testing. After analysis, our technicians usually know the fault exactly. Accordingly, we specifically measure the affected stages and immediately replace defective components.
Additionally, preventive maintenance is performed on all known weak points, even if they currently show no faults. This ensures long-term reliability of the device. Our goal isn’t to have devices regularly returned for further repairs but rather to ensure stable long-term operation—exactly what our satisfied customers appreciate.
How often do you hear about devices only surviving their warranty period? We focus on sustainable quality.
The following tasks were performed during the repair:
- Preventive overhaul: replacement of all necessary defective and worn parts.
- Intensive cleaning of the unit.
- Comprehensive final and load testing on our specialized test benches.
- Parameter adjustment or restoration of necessary parameters.
- Thorough completion of documentation and checklists.
Price and Delivery Time for Okuma MIV0303-1-B1
For more information about our Okuma repairs, please click here.
📞 Feel free to contact us if you have any questions regarding your Mitsubishi drive technology. Our experienced team is always ready to provide you with expert advice and support.
Overview: Technical Specifications – Okuma MIV0303-1-B1
- Type: 2-channel servo amplifier (Inverter Module)
- Output Power: 3.0 kW per axis (two axes)
- Supply Voltage: 300 V DC (intermediate circuit), 24 V DC (control voltage)
- Control: Digital (ServoLink-Bus), compatible with Okuma CNC controls
- Display: Front-mounted 7-segment LED for status and error codes
- Weight: approx. 6.3 kg
- Design: Compact built-in variant with passively cooled heat sink
- Dimensions (approx.): 300 mm × 100 mm × 335 mm (H×W×D)
Applications in CNC Machines
This module is typically used in:
- Okuma CNC Lathes: LB series (e.g., LB-15)
- Okuma Vertical Machining Centers: MX series (e.g., MX-45VAE)
It was especially used in CNC machine tools from the late 1990s and early 2000s, equipped with OSP7000 or OSP U100 controls.
Functional Description
The Okuma MIV0303-1-B1 servo amplifier converts position and speed commands from the CNC control into controlled electrical energy, precisely driving up to two axis motors. The module continuously monitors motor conditions, accurately regulates speed and torque, and reports any faults visually via LED and audibly. It is thus essential for accurate and safe positioning of your CNC machine axes.
We hope this overview helps clarify details about the Okuma MIV0303-1-B1 module. Please feel free to contact us with any questions or repair needs!
