Product Description:

The PMB31D-10116-01 is a brushless AC servomotor built by Pacific Scientific within the PMB Brushless Servomotors series. It is intended for closed-loop motion control in automated cells where repeatable torque, speed, and positioning are required. Integrated rare-earth magnets and a digital feedback interface allow the motor to synchronize with contemporary servo drives, enabling precise axis control for pick-and-place gantries, form-fill-seal stations, and general material-handling equipment on the factory floor.

The mechanical envelope follows the NEMA Size 34 frame, so the mounting face, pilot diameter, and bolt pattern match other NEMA-34 actuators. The motor has a round shaft that carries the load, and the absence of keyways helps maintain concentric coupling under cyclic reversals. Power and feedback exit the stator through flying leads with AMP connectors, providing pre-terminated conductors for external connections. Rotor position is reported by an optical encoder that delivers 4096 ppr resolution, and this count density supports smooth velocity control and fine incremental moves at low speed. Under a 240 VAC bus, the windings can hold 5.4 ARMS continuously at stall, which is the thermal limit for static torque production during tensioning or vertical-axis holding cycles.

Commutation data originate from a digital encoder with commutation, so the drive receives phase information at power-up and can produce sinusoidal currents without an additional Hall sensor set. The housing is prepared with a shaft seal, which restricts lubricant egress and helps prevent particulate ingress when the motor is mounted in washdown or light-splash zones. Electromagnetic capacity is tied to a stack length multiple of 1, which keeps inertia modest for rapid acceleration commands. In controller parameters, the motor is identified as a PMB series brushless servomotor, allowing the matching drive to apply the proper current settings and encoder formatting.