Product Description:

The 2VM62-020-7 belongs to the Low Inertia PMDC Servomotors series produced by Pacific Scientific. It is a permanent-magnet DC servomotor intended for drive axes that demand fast acceleration and precise speed holding in industrial automation cells, pick-and-place heads, or light gantry systems. Low rotor inertia lets the motor change velocity quickly, while the series designation signals compatibility with Pacific Scientific’s matched drives and feedback options.

A standard analog tachometer is mounted on the motor shaft to provide a proportional voltage signal for closed-loop speed control. The tachometer housing has a diameter of 1.875 in and a body length of 1.052 in, dimensions that help determine how much space is needed at the non-drive end of the machine frame. Internal coil resistance at the tach terminals measures 50 ohms; this resistance influences the loading that a drive’s input circuit can present without affecting accuracy. The generated feedback level follows a tach voltage constant of 1.5 V/KRPM, so the drive electronics will see 1.5 volts for every 1000 rpm of shaft speed and can scale their regulation algorithms accordingly.

Because the unit is a PMDC servomotor, commutation is handled by a mechanical brush system and no Hall sensors are required. The frame uses no forced-air cooling; heat is removed through conduction to the mounting surface, which simplifies installation in compact cabinets but requires attention to ambient temperature. Position feedback is limited to tachometer data because an optical encoder is not attached, and users who need digital position information must add an external encoder. Velocity quality is aided by a maximum tach ripple of 1.5%, which helps keep speed error low during steady-state operation across the working range.