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OKUMA Servo Drive
Brand: OKUMA -
Code:MIV0404A-1-B5
| Combination name | Availability | Price |
|---|---|---|
AC Servo Drive – OKUMA MIV0404A-1-B5
The MIV0404A-1-B5 is an AC vector servo drive (“AC Servo Drive”) manufactured by OKUMA Corporation, belonging to the MIV series (Motor Interface Vector) used in OKUMA CNC systems with the proprietary OSP control (Open System Platform). The unit converts digital CNC commands into current and voltage signals for the AC brushless motor of the controlled axis, managing the current and speed loops in vector mode. The part number MIV0404A-1-B5 identifies the MIV series, current class 04 A, hardware revision A-1 and mechanical/firmware variant B5.
The servo drive is the power and regulation module that translates position and speed references generated by the OSP control into variable current for the axis motor: it closes the current and speed loops ensuring precise and repeatable motion during machining. A drive failure renders the controlled axis completely inoperative, immediately stopping the machine; as a proprietary OKUMA electronic component, availability as new is nil and sourcing relies exclusively on the surplus market and specialist repair.
OKUMA Corporation is a Japanese machine tool builder founded in 1898 in Nagoya, a pioneer of vertical integration in the CNC sector through the in-house production of machines, controls and drives. The proprietary OSP control and the associated MIV-series drives are legacy / discontinued: no longer available as new through official OKUMA channels, sourced exclusively as used surplus stock or through specialist repair providers.
Main Technical Specifications
| Type | AC vector servo drive (AC Servo Drive – MIV series) |
| Part number | MIV0404A-1-B5 (MIV0404A1B5) |
| Brand | OKUMA Corporation |
| Known application | OKUMA CNC machine tools with OSP control (MB, MX, LB, LC, MA series machining centres and lathes) |
| Function | Vector speed and current control of servo axis motor |
| Supply voltage | 3~ AC 200–230 V, 50/60 Hz |
| Rated output current | ~4 A |
| Technology | IGBT, PWM modulation, vector current control |
| Control interface | Proprietary OKUMA OSP serial bus; edge and terminal connectors |
| Feedback | Encoder / resolver from OKUMA servo motor |
| Weight | ~2–5 kg |
| Dimensions | ~150–300 mm × 80–200 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
