Product Description:

The BL-MC50J-30T is part of the BL Servo Motors series from Okuma. Designed for continuous duty in precision machining centers, the motor delivers tightly controlled rotational motion to ball-screw or timing-belt drives. By integrating a position encoder with a permanent-magnet rotor, it becomes a responsive actuator that lets CNC controllers index, interpolate, and hold tool paths without manual adjustment. The construction supports a high power-to-weight ratio, making it suitable for dynamic acceleration sequences in automated manufacturing cells. This arrangement supports precise axis movement in milling, turning, and transfer applications where repeatable positioning is required across long production runs. Thermal limits are handled by a frame that dissipates heat through natural convection.

Energized from a 133 VAC bus, the motor accepts power through a three-phase connection that helps smooth electromagnetic force production. Its continuous output is 1.5 kW, supplying feed drives with steady mechanical power during continuous-duty operation. When commanded to maximum operating speed, the rotor turns at 3000 rpm, enabling rapid traverse moves while staying within bearing limits. For static cuts or axis clamping, the windings can resist load with 5.4 N·m of stall torque, helping prevent position drift until motion resumes. The combination of speed and stall torque supports both rapid positioning and stable holding during short dwell periods.

Position accuracy comes from the ER-J-7200D encoder, which produces high-resolution feedback pulses synchronized to each revolution. Internally wound coils are rated for a carrier frequency of 200 Hz, and this electrical speed helps keep torque response consistent across the duty cycle. The rotor uses 8 poles, which helps balance inertia and torque density for smooth low-speed control. Because it is an AC servo motor, vector-based amplifiers can command rapid torque changes for coordinated multi-axis interpolation in Okuma lathes, milling machines, and gantry loaders. This feedback and motor structure allow the axis to respond quickly to changing commands while maintaining controlled motion during contouring and point-to-point moves.