Product Description:

The PMB31D-00114-02 belongs to the PMB Brushless Servomotors series manufactured by Pacific Scientific. It is a permanent-magnet servomotor intended for closed-loop positioning in industrial automation, where rapid acceleration and repeatable stopping points are required for stations such as pick-and-place gantries and small indexing drives. By pairing with a matched servo amplifier, the motor converts three-phase power into controlled mechanical output while returning position data to the controller through its integrated feedback device.

The mechanical frame follows the NEMA Size 34 standard, so its mounting face and pilot diameter align with widely used 86 mm square brackets for straightforward installation in existing machinery. Power and signal wiring exit the housing as flying leads with AMP connectors, eliminating the need for an external mating plug and allowing direct routing through cable tracks. Position feedback is generated by a quadrature encoder rated at 2048 ppr; this resolution provides 8192 discrete counts per revolution after standard four-edge decoding, enabling fine incremental moves. Commutation data for the drive is supplied by the same sensor, identified as a digital encoder with commutation, which removes the need for separate Hall devices. Under locked-rotor test conditions at 240 VAC, the winding draws a nominal stall current of 5.4 ARMS, which helps with drive sizing and thermal calculations for continuous static loads.

A PTC Thermistor is embedded in the stator to signal rising temperatures before insulation limits are approached. The output shaft is machined with a flat surface that provides a positive drive face for setscrew-style couplings without adding keyway stress. Magnetic stack height is minimized by a stack length multiple of 1, keeping inertia low for quick speed changes.