Product Description:

The VAC2-D30-A spindle drive is produced by Okuma as part of the VAC Spindle Drives series. It converts incoming AC power to a controlled DC link and inverter output that governs torque and speed on CNC machine spindles used for cutting and finishing operations. The drive’s role in industrial automation is to supply regulated energy that matches commanded speed profiles, allowing consistent material removal and surface finish in automated machining centers.

Designed for medium to large machining centers, the unit pairs with spindle motors rated from 22/18.5 to 37/30 kW so one chassis accommodates both continuous and intermittent duty. Its DC link is held at 300 Vdc, giving the inverter a stable energy reservoir that eases regeneration during rapid deceleration. Alarms appear on 2 seven-segment LEDs, allowing numeric codes to be read without external tools. Heat is removed by 4 axial fans that force air across the heat sinks and keep semiconductors within limits during heavy cuts. The footprint of 34 × 12 × 16.5 in fits common electrical panels and preserves space for cable bends. Source inductance must stay below 70 µH at 220 V or 170 µH at 200 V, and the input tolerates 6% variation on 220 V or 15% on 200 V to limit nuisance trips.

The molded front bezel is finished in dark brown, providing visual distinction from servo and axis drives mounted in the same rack. Rotor position data reaches the controller through a resolver, giving absolute angle feedback that remains immune to electrical noise. Command and diagnostic data move over a fiber-optic link, eliminating ground loops and supporting high-speed signal integrity across long cabinet runs. For applications that require synthesized orientation during tapping or tool change, spindle speed accuracy is refined further by a pulse generator channel. These feedback paths support stable torque delivery across the drive’s intended power range.