Product Description:

The 33VM62-220-16 is a low-inertia permanent-magnet DC servomotor manufactured by Pacific Scientific in the Low Inertia PMDC Servomotors series. This motor is intended for industrial automation tasks that demand fast speed changes and tight velocity feedback, such as small conveyor drives, labeling heads, or light robotic axes. Its permanent-magnet design keeps the rotating mass low so the drive can follow command changes with minimal delay, giving machine builders a responsive actuation element for precise position or speed loops.

The housing is ventilated by air inlet and outlet with baffles, a passive path that channels cooling air across the windings without external blowers. A separately mounted tachometer is integral to the feedback scheme; its cylindrical body measures 1.875 in in diameter and 1.042 in in length, allowing compact installation behind the motor frame. During operation, the generator delivers a velocity signal of 1.5 V/kRPM, a ratio that lets the control loop translate voltage directly into rotational speed. Linearity of the tachometer output is held within ±0.5% of output, so speed feedback remains proportional over the usable range and eliminates the need for extensive calibration curves.

The tachometer coil presents a winding impedance of 50 Ω, a resistance level suited for direct interface with typical drive amplifiers without overloading their sensing circuits. Ripple on the generated signal is limited to 1.5% max, keeping velocity data stable for finely tuned proportional-integral speed regulators. Feedback is provided by a standard analog tachometer only, and the motor is supplied without an attached optical encoder, so position information must be derived externally if required. A separate position sensor is needed when the application requires direct positional feedback rather than speed feedback alone.