Product Description:

The PMB31D-10Y14-10 is a brushless servomotor built by Pacific Scientific for the PMB Brushless Servomotors series. The motor converts electrical energy from a compatible servo drive into controlled rotary motion for actuators, indexing tables, and other automated equipment. Closed-loop feedback allows the drive to monitor rotor movement and correct variations in speed or position during repetitive operating cycles. This arrangement supports accurate motion when changing loads or rapid direction changes would otherwise cause the shaft to deviate from the commanded profile.

The motor uses a digital encoder with commutation that provides 2048 pulses per revolution along with commutation tracks for motor phase alignment. The incremental feedback gives the connected controller detailed position information throughout each shaft revolution, while the commutation signals help the drive energize the windings in the correct sequence. A NEMA Size 34 housing allows the motor to mount on gearboxes, brackets, and machine plates designed for a 3.38-inch square flange. The winding has a nominal stall current of 5.4 A RMS, which must be considered when selecting the drive and conductors for continuous operation. Mechanical output is delivered through a round shaft that works with clamp-style couplings and other compatible connection hardware. The magnetic assembly has a stack-length multiple of 1, providing the shortest active stack available for this configuration and reducing rotor inertia. The motor uses rare-earth magnets to maintain useful torque density without adding unnecessary rotor mass.

The low-inertia rotor supports rapid acceleration and deceleration in compact motion systems, including pick-and-place equipment and light conveying machinery. Its square mounting face provides a stable interface that helps preserve shaft alignment when the motor is attached directly to a machine frame or gearbox. Clamp-style coupling permits secure torque transfer without requiring a shaft key, provided the coupling is sized and tightened correctly. Laminated steel in the magnetic circuit helps manage internal losses during repeated motion sequences, while the compact active length keeps the motor responsive. Cable routing should provide adequate clearance near the feedback and power connections so movement or vibration does not place stress on the conductors.