Product Description:

The PMB31B-10200-00 belongs to the PMB Brushless Servomotors series produced by Pacific Scientific. This brushless unit is built for closed-loop motion axes where precise torque and speed control are required, such as pick-and-place arms, indexing tables, or light gantry drives. The motor integrates a permanent-magnet rotor with an electronically commutated stator, so it can be paired with modern digital amplifiers for responsive positioning in industrial automation. That arrangement supports smooth torque production during repeated start-stop cycles and stable low-speed motion when an axis must hold a commanded position.

Power and feedback wiring exit the housing through flying leads with MS connectors, a format that simplifies installation and shortens changeover time on the production floor. The frame conforms to NEMA Size 34, and its 3.4-inch square flange matches common servo gearheads without the need for an adapter plate. Under a locked-shaft condition, the windings draw a nominal stall current of 2.7 ARMS, which is useful when setting current limits in the matching drive. Rotor position is reported by a built-in resolver, which provides rotor angle feedback with strong immunity to electrical noise from nearby switching equipment. This cable and feedback arrangement keeps electrical connections compact at the motor body and suits machines with limited mounting space.

The motor is supplied as a standard motor, with no user-specific changes to the winding, connectors, or shaft features. It is a PMB Series Brushless Servomotor, so commutation is electronic and there are no brushes to wear during operation. Output torque is transferred through a round shaft, a geometry suited to clamp couplings when backlash must remain minimal. A stack length multiple of 1 keeps the active iron short, which lowers rotor inertia and supports quick acceleration and deceleration during rapid point-to-point cycles. The short magnetic stack also helps the motor respond cleanly to frequent speed changes on light and medium-duty axes.