Product Description:

The 4N63-100-1 is a permanent-magnet DC servomotor produced by Pacific Scientific as part of its Low Inertia PMDC Servomotors series. Its low-inertia rotor supports rapid acceleration and deceleration, making the unit suitable for positioning tables, high-speed pick-and-place axes, and other automation points that require short cycle times. By coupling directly to light mechanical loads, the motor converts controller current commands into regulated torque while keeping motion profiles repeatable and overshoot low in servo loops. It works with low-voltage servo drives that regulate armature current and monitor feedback devices, giving compact machines responsive closed-loop motion.

The motor’s electrical ratings describe its continuous operating point. When supplied with 42 V on the armature, it draws 14.2 A of steady current and reaches a nominal shaft speed of 3440 rpm. This operating range fits compact servo systems that need quick response without the added size of higher-voltage motor platforms. At that condition, each ampere produces 0.069 Nm/A of developed torque, so commanded current corresponds directly to output torque in a predictable way. The electrical time constant is only 0.11 ms, which allows current changes to move through the windings quickly and helps the amplifier correct speed or position errors with very little delay.

For short bursts, the controller can command a pulse current of 48 A, giving the motor additional margin for acceleration, reversals, and brief peak loads. The continuous electrical input converts to a shaft output of 321 W, reflecting the motor’s rated output under normal running conditions. Mechanical response is also very fast, with a rotor mechanical time constant of 0.6 ms, so speed changes follow current surges almost immediately. The low-inertia design is further reflected by a torque-to-inertia ratio of 2.543e5 1/s², which supports quick settling and accurate tracking during demanding motion sequences. These traits make the motor well suited for repetitive positioning duties where smooth starts, stops, and direction changes are important.