Product Description:

The VAC-MML22-18.5R-159-R1 is an alternating-current servo motor designed by Okuma for the VAC Servo Motors series. It acts as the rotary actuator in numerically controlled machine axes and automated material-handling stations, converting commanded current from its matched drive into precise shaft motion. By using closed-loop feedback, the unit maintains tightly regulated torque and speed profiles needed for repeatable industrial processes. Its frame geometry is suited to medium-to-high power applications where both acceleration and continuous duty are required.

To match electrical characteristics, the motor connects to the D22A/1104 drive unit, a pairing that ensures compatible current scaling and control behavior. Under intermittent loads, it supplies 22 kW for a 30-minute duty window, while its thermal design supports a continuous output of 18.5 kW without derating. Peak mechanical velocity reaches 6000 rpm, giving headroom for high-surface-speed cutting or rapid traverse moves. Classification as type 1 within the VAC lineup identifies the winding resistance, encoder format, and connector orientation used by earlier control systems. These values describe the motor’s power range, speed capability, and drive-matching requirements.

Fine adjustment is performed with five dual in-line switch banks mounted on the encoder end cap. Switch bank SW1 is preset to 3,4,7,8, establishing motor identification bits for the drive. SW2 carries the pattern 1,2,4,5 to tune velocity loop gain, while SW3 uses the same pattern for position scaling. Additional resolver filtering is set through SW4 at 2,3, and the current-limit option is latched by SW5 at 1,2. These switch settings adjust identification and response behavior for the connected axis without changing the motor’s basic power and speed characteristics.