Product Description:

The PMB31D-00214-02 is a brushless servomotor manufactured by Pacific Scientific. In motion-control cells, this servomotor couples directly to indexing tables, material-handling axes, or small gantries and delivers electronically commutated torque under closed-loop speed and position control. That operating style supports repeatable indexing, smooth low-speed movement, and stable response during frequent start-stop cycles. Its compact format suits equipment that needs accurate motion without adding unnecessary mechanical bulk.

The motor body follows the NEMA Size 34 frame standard, allowing it to fit machine layouts built for size 34 motors. Under 240 VAC operation, its nominal stall requirement is 5.4 ARMS, which indicates the continuous current the drive must supply while the rotor is locked. Position feedback is supplied by an internal encoder delivering 2048 ppr, giving the control loop fine incremental position data for precise speed and position correction. Power and feedback conductors exit as flying leads with MS connectors, which simplifies cable routing and connection in compact installations. A flat shaft end lets couplings clamp directly to the machined surface instead of using keys, which can help where shaft access is limited.

A digital encoder with commutation sensor block combines Hall signals and incremental channels, so the drive receives phase information and position counts from one feedback device. Thermal protection is embedded as a PTC thermistor; when winding temperature rises past its knee point, resistance increases sharply and the amplifier can limit current. This added protection helps reduce thermal stress during repeated acceleration cycles and sustained holding periods. The electromagnetic core uses the 1 stack-length code, which keeps inertia low for quick acceleration and deceleration. The unit is a PMB Series Brushless Servomotor and uses the commutation and feedback format common to that platform.