Product Description:

The VAC-MFL3.7-2.2R-151T is a servo motor produced by Okuma within the VAC Servo Motors series. Designed for CNC lathes, machining centers, and other automated axes, the unit converts electrical reference signals into precise rotational movement. Integrated feedback and close coordination with matching VAC drives allow accurate closed-loop control, so the motor can position slides, spindles, or auxiliary tooling reliably during continuous duty in industrial automation.

The motor is paired with drive unit model D6A/1104, ensuring compatibility for current, resolver signals, and fault diagnostics. A nominal supply of 130 V establishes the magnetic flux level required for rated torque while keeping insulation stress moderate. Mechanical output is listed as 3.7/2.2 kW; these dual values indicate the upper continuous rating and a reduced setting used when thermal limits or lower-power operation is selected. Commanded speed can vary from 1500 rpm during low-load threading operations up to 8000 rpm for high-surface-speed finishing. This wide operating range lets a single axis shift from slow indexing to rapid traverse without gear changes, reducing cycle time and mechanical complexity. Voltage, power, and speed ratings are matched so the drive can regenerate energy without exceeding DC bus margins.

The factory configuration uses preset control settings. The control board jumpers are set to SW5 0; SW6 0, assigning default gain ranges to the current loops. Front-panel selectors remain at SW1 1,5; SW2 1,5, which activate standard encoder resolution and disable optional braking resistors. Analog trim circuits are left neutral with VR1 0; VR2 0; VR3 0, so response characteristics can be adjusted through the drive rather than the motor body. The Vac Type 2 classification uses flange dimensions and a shaft key profile that match Okuma’s second-generation VAC mechanical interface, so it fits compatible mounts and couplings across that platform.