BL-MC400E-15SNA by Okuma

The BL-MC400E-15SNA is a servo motor engineered by Okuma for the BL Servo Motors series. As a rotary actuator, it converts electrical energy into precisely regulated mechanical motion, allowing CNC tables, feed axes, and automated handling devices to track programmed positions with minimal following error. The motor pairs with Okuma drive amplifiers and machine controllers so that current, speed, and position loops are closed in real time during industrial automation tasks. This arrangement lets the axis respond quickly to commanded changes in load and direction during continuous machine operation.

The unit supplies a continuous shaft capacity of 6 kW, which is the rated mechanical power available without thermal derating under normal operating conditions. To achieve that output, it draws power from a 145 V AC line. It is wired for a three-phase supply, so the stator windings receive balanced sinusoidal currents that help minimize torque ripple. Rotor position feedback is produced by absolute encoder feedback, which lets the control system know the shaft angle immediately after power-up without a homing routine. The feedback device is an ER-FC-2048D encoder, and its 2,048 counts per revolution are multiplied electronically by the drive to provide high-resolution velocity and position data.

During operation, the motor runs at a nominal speed of 1500 rpm, placing its torque band in a range well suited to medium-inertia machine axes that need constant surface speed while cutting or transferring workpieces. The device is identified as an AC servo motor, indicating that its excitation and control strategy matches standard PWM inverters rather than brushed commutation. Manufactured in Japan, it is intended for integration into production equipment that requires precise rotary motion. Compatibility with Okuma OSP numerical control platforms supports coordinated motion in machine-tool applications. This combination supports feed systems that require steady speed and repeatable positioning across long duty cycles.