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OKUMA Servo Drive
Brand: OKUMA -
Code:BL-D30A
| Combination name | Availability | Price |
|---|---|---|
Brushless Axis Servo Drive – OKUMA BL-D30A
The BL-D30A is a brushless servo drive (“Brushless Servo Drive”) manufactured by OKUMA, designed as an axis drive component for OKUMA CNC machine tools equipped with the proprietary OSP control (Open System Platform – e.g. OSP5000, OSP7000). The module integrates the current and velocity control loops for OKUMA BL-series brushless servo motors, interfacing with the OSP controller via a dedicated internal bus. The part designation identifies the BL Drive family in the configuration with a typical nominal output current of 30 A. The unit may exist in multiple hardware revisions; compatibility with the target machine’s control system and serial number must be verified before installation.
The brushless servo drive is the heart of every controlled-axis drive system in the machine: it receives position and velocity commands from the CNC, closes the feedback loops on encoder and motor current, and generates the three-phase current required to move the servo motor with the required precision. A failure of the BL-D30A completely disables the corresponding axis, rendering the machine inoperable; latent faults in the drive can cause loss of position reference, uncontrolled movements, or damage to the workpiece in progress.
OKUMA Corporation is one of the world’s leading CNC machine tool manufacturers, founded in Japan in 1898. It is renowned for full vertical integration: it designs and manufactures CNC controls (the OSP system), brushless motors, and drives entirely in-house, ensuring optimised compatibility and performance across all components. OKUMA electronic spare parts are highly proprietary and not interchangeable with other brands; for legacy models such as the BL-D30A, availability is limited to the used/surplus market and specialist repair services.
Main Technical Specifications
| Type | Brushless servo drive (Brushless Servo Drive) |
| Part number | BL-D30A (BLD30A) |
| Brand | OKUMA Corporation (Japan) |
| Known application | OKUMA CNC machine tools with OSP control (lathes, machining centres, grinding machines) |
| Function | Axis drive: current, velocity and position regulation for brushless servo motor |
| Nominal output current | ~30 A (typical for BL-D30 family; verify datasheet) |
| Supply voltage | Three-phase 200–240 V AC |
| Feedback | Absolute encoder / resolver from OKUMA BL-series servo motor |
| Interfaces | OSP internal bus; OKUMA proprietary connectors (encoder, motor, machine I/O) |
| Control compatibility | OKUMA OSP5000 / OSP7000 (and variants; verify compatibility with machine S/N) |
| Weight | ~2–5 kg |
| Dimensions | ~150–300 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
