Product Description:

The PX-MAF230J-3TB-A is an AC servo motor manufactured by Okuma within the PREX Servo Motors series. Designed for closed-loop positioning and feed drives in CNC machining centers, the unit converts controlled electrical power into precise mechanical motion for industrial automation axes. By integrating with Okuma drive amplifiers and absolute feedback networks, the motor provides the rotational accuracy needed for contouring, tool handling, and coordinated multi-axis movement. Its servo response also supports feed axes that must reverse direction quickly while maintaining repeatable path control under changing loads.

It operates from a three-phase supply wired in a Y connection. At a rated voltage of 85 V, the armature draws 9.20 A to deliver a continuous mechanical output of 0.7 kW. The rated electrical frequency is 15 Hz, and at this excitation the shaft reaches a nominal speed of 300 rpm, which suits low-speed, high-torque cutting applications. Feedback is provided by the Okuma ER-JH-7200D encoder, an absolute device that offers single-turn position data, so the controller knows rotor angle immediately after power-up. The windings interact with the rotor magnets across the three phases to generate steady torque with smooth rotation at low commanded speed.

Beyond its continuous ratings, the unit can resist load at standstill with a stall torque of 22.5 N·m, enabling the axis to counter cutting forces during dwell periods. The stator is wound for 6 poles, a configuration that balances torque production against electrical frequency and keeps servo bandwidth compatible with low-speed machining. Adherence to IEC34-1 covers mechanical tolerances, insulation class, and test methods, allowing straightforward comparison with global electrical machinery rules. This combination supports stable holding behavior during low-speed machining and brief pauses under changing axis loads.