Product Description:

The M818T-031 is a DC servo motor manufactured by Sanyo Denki for the Super DC Servo Motors series. Designed for closed-loop motion axes, it converts electrical energy into precise rotary movement so that positioning tables, small conveyors, and electronic assembly heads can follow programmed velocity profiles. A tachometer generator is integrated at the rear of the frame to deliver proportional speed feedback directly to the drive electronics, eliminating the need for separate velocity transducers in many industrial automation layouts.

The motor is energized from a nominal supply of 48 VDC; at this voltage, it reaches a rated shaft speed of 3000 rpm. Continuous armature current is limited to 5.3 A, producing a steady torque of 0.6 N·m for routine indexing or tensioning duties. Control circuits must provide at least 10 kΩ of input resistance to meet the minimum load resistance and avoid overloading the tachometer output. Because the feedback device is mounted on the same shaft, its dynamic response matches the motor’s electrical time constant with minimal phase lag. This arrangement allows the drive to monitor velocity changes directly during acceleration, deceleration, and steady operation.

During acceleration bursts, the winding can accept a peak current of 40 A, enabling short duty cycles that demand up to the rated mechanical output of 180 W. The tachometer produces a stable reference voltage of 7 V/krpm, supporting high-gain speed loops that require tight regulation even when load inertia varies. A ground steel shaft with a diameter of 11 mm and a length of 25 mm transmits torque to couplings or pulleys. The motor’s rotor and bearings can carry a maximum radial load of 10 kg without exceeding deflection limits. The unit remains compatible with compact drive cabinets because of its compact installation depth and lack of external cooling hardware.