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OKUMA Servo Drive
Brand: OKUMA -
Code:MIV45-3-V5
| Combination name | Availability | Price |
|---|---|---|
Axis CNC Servo Drive – OKUMA MIV45-3-V5
The MIV45-3-V5 is a digital CNC axis servo drive (“Axis Servo Drive”) manufactured by OKUMA Corporation, a component of the axis control architecture in OKUMA CNC machining centres and lathes equipped with the proprietary OSP (Open System Platform) numerical control. The unit receives position and speed references from the NC board via OKUMA’s proprietary serial bus and digitally manages the current, speed, and torque loops of the AC servo motors driving the machine axes. The suffix V5 identifies the hardware/firmware revision within the MIV45 series; the number 3 denotes the axis configuration variant of the unit.
The servo drive is the component that converts digital commands from the CNC into phase currents for the machine axis AC motors, closing the position, speed, and torque control loops in real time. A failure immediately triggers an axis alarm and halts machining; an uncontained following error can cause collisions or dimensional rejects, making this drive critical for both process safety and part quality.
OKUMA Corporation is one of the world’s leading CNC machine tool manufacturers, founded in 1898 in Oguchi, Aichi, Japan. It is the only builder that designs and manufactures machines, motors, drives, and the numerical control system (OSP) entirely in-house, ensuring full vertical integration. Components in the MIV series belong to OSP control generations that are now in an advanced stage of their life cycle: availability as new spare parts is very limited, and specialist repair or authorised OKUMA distributors are strongly recommended.
Main Technical Specifications
| Type | Digital CNC axis servo drive (Axis Servo Drive) |
| Part number | MIV45-3-V5 (MIV453V5) |
| Brand | OKUMA Corporation |
| Known application | OKUMA CNC machining centres and lathes with OSP control (e.g. MB, MA, MC, LB, LT series) |
| Function | Digital position, speed, and torque regulation for CNC axis AC motors |
| Input voltage | 3~ 200–230 V AC (typical; verify nameplate) |
| Rated current | ~45 A per phase |
| Communication | Proprietary OKUMA serial bus / OSP |
| Feedback | Absolute / incremental encoder from axis servo motor |
| Interfaces / connectors | Multi-pin connectors; OSP backplane bus; power terminal blocks |
| Weight | ~3–7 kg |
| Dimensions | ~250–400 mm × 100–200 mm × 150–280 mm |
| Production status | Legacy / discontinued — available as used, surplus or through specialist repair only |
