Product Description:

The PMB11B-00114-00 is a brushless servomotor produced by Pacific Scientific as part of the PMB Brushless Servomotors series. This compact rotary unit converts controlled electrical power into precise torque and speed, making it suitable for positioning axes, small gantries, and index tables in industrial automation. It integrates easily with low-power digital drives and supports high-resolution feedback for smooth motion profiles in packaging, semiconductor handling, and test equipment. Because the magnetic stack is short, the motor fits where depth is limited and still delivers adequate stall torque for mid-range servo axes. Its compact body also helps when the motor must be mounted near slides, guards, or other tightly packed machine components.

The motor uses a Size 17 frame that supports mounting in confined spaces. Electrical connection is provided through flying leads with AMP connectors, allowing quick connection to a drive harness without an added breakout board. On a 240 VAC supply, the winding has a nominal stall current of 2.7 A RMS, which supports continuous torque while the rotor is locked. Position feedback is generated by a 2048 ppr incremental encoder, giving 2048 discrete counts per revolution for fine resolution. That feedback helps support smooth low-speed motion and accurate stopping on short moves. The feedback device is a digital encoder with commutation, so the same sensor also provides the signals needed to align the stator fields without a separate Hall board.

The motor has a flat shaft end for coupling to pinion gears or pulleys without a keyed hub. It is supplied as a standard motor, so its mechanical tolerances and thermal ratings follow the baseline PMB platform. A stack length multiple of 1 keeps the magnetic core short, which helps keep inertia low and supports quick acceleration after new encoder data is received. The short stack also reduces rotating inertia during repeated start-stop cycles, which is useful on indexing and positioning applications.