Product Description:

The MAC025A-0-WS-4-E/040-B-0/WI654LV is an AC servo motor produced by Bosch Rexroth Indramat within the MAC AC Servo Motors series. It converts voltage commands from analog drive amplifiers into regulated shaft torque and speed, allowing positioning tables, feeders, and small spindles to move with consistent accuracy in automated production lines. Its low rotor inertia supports the rapid start-stop cycles required by pick-and-place gantries and other lightweight positioning axes.

The winding code WS indicates a coil arrangement with electrical characteristics matched to compatible Indramat servo controllers. Frame designation A indicates a narrow flange and shaft arrangement that fits compact machinery. The stack length index 025 indicates an extended magnetic core that increases continuous output without enlarging the motor’s footprint. Heat is discharged through natural convection, eliminating the need for a cooling fan and reducing the number of moving components. Power enters through a connector on side B, which directs cabling toward the rear of an enclosure for orderly routing. The compact profile and passive cooling system make the motor suitable for installations where space and airflow are limited.

The motor has no blocking brake, so stationary loads must be held by drive torque or an external mechanical device when power is removed. Supplied as a motor for analog drives, it interfaces with ±10 V command stages commonly used in legacy motion systems. The feedback circuit combines a tachometer signal with encoder data to support both velocity and position control loops. The standard configuration uses an incremental encoder with standard mounting, providing precise position feedback without increasing the motor’s overall length. This feedback arrangement helps the drive maintain smooth velocity control during frequent reversals and changing loads. Applications that require load retention during shutdown must use an external lock, clamp, or another suitable holding mechanism.