Product Description:

Pacific Scientific manufactures the R34KSNP-R2-NS-NV-02 as part of its R Servomotors series. This unit is a brushless servo motor intended to supply tightly regulated rotary motion in automated machinery, positioning tables, and material-handling axes where repeatable speed and torque are required. Its brushless design supports precise response and reduces wear associated with mechanical commutation during repeated duty cycles.

The motor’s continuous stall torque is 3.2 Nm, so it can deliver that torque at zero speed without exceeding thermal limits under continuous-duty conditions. A compact frame measuring 3.25 inches square allows installation on small mechanical structures, while the housing is explosion-proof for use in hazardous locations when the system is installed correctly. Rated speed reaches 4000 rpm, providing a useful operating range for high-cycle pick-and-place or spindle duties. Rotor inertia is 0.11 × 10⁻³ kg·m², which helps the servo system accelerate and decelerate quickly with low following error. The motor uses medium-high windings, balancing thermal capacity and electrical resistance for continuous torque without excessive current draw. Because no holding brake is fitted, the axis must rely on drive torque or an external lock to maintain position when power is removed, and the design omits a shaft seal to reduce drag on the rotor.

Maximum overload capability is reflected by a peak torque of 8.30 Nm, allowing short bursts to overcome static friction or brief process disturbances. The magnetic circuit uses rare-earth samarium-cobalt magnets, which provide high energy density and stable field strength over a broad temperature range. Primary feedback comes from a frameless resolver, a transmitter-type size 21 element that supplies rotor-angle information for deterministic commutation even at zero speed. A stack length of 4 inches sets the active iron and copper volume while keeping the motor short enough for shallow mounting spaces. No secondary feedback is provided, so the control system relies on the resolver for commutation and position-related feedback.