VAC1-D8-B Okuma
Wake Industrial LLC is not an authorized distributor of this product.
MPN: VACA303J
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The Okuma VAC1-D8-B is part of the VAC Spindle Drives series and features an analog interface type with isolated control ground. It includes a VAC Board II and VAC Card 1 control PCB set, and supports analog voltage speed command input. Motor signal connectors include 16-pin, 10-pin, and 9-pin options, while monitor outputs are VEL ±10 V and TQ ±10 V.
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Product Description:
The VAC1-D8-B is a spindle drive module produced by Okuma within the VAC Spindle Drives series. It serves as the power and control interface between a CNC controller and a high-speed spindle motor, converting command signals into regulated torque and velocity for metal-cutting processes and other automated machining tasks. In normal operation, the module manages spindle response during acceleration, constant-speed cutting, and deceleration so the motor follows the command profile sent by the machine control.
The control section is galvanically separated because its ground path is isolated, helping suppress noise between logic and power domains. Drive intelligence resides on a dual-board stack made up of VAC Board II + VAC Card 1, which combines motion processing with input and output conditioning on one assembly. All host interaction is through an analog interface, so velocity or torque references are accepted as proportional voltages rather than digital words. Internal arithmetic operates on a 16-bit data path, giving adequate numerical resolution for loop calculations and position estimation. Feedback from the spindle’s resolver is captured every 128 µs, which sets the update period for speed estimation and supports stable low-speed control.
Status can be monitored through buffered outputs labeled VEL ±10 V; TQ ±10 V, which mirror real-time velocity and torque commands for oscilloscope diagnostics. Motor feedback, resolver lines, and encoder power are routed through housings rated at 16-pin, 10-pin, and 9-pin, which helps organize the external connections. Cabinet installation uses a slotted frame with an upper slot x2 and lower round slot x2 mounting pattern so the unit can slide into the rack and be secured without extra brackets. Speed references arrive as an analog voltage that changes linearly with commanded RPM. Power lugs are matched to the application wiring; the cooling fan lands on M4 screws, while both motor and DC supply leads terminate on the larger fittings described as fan M4, motor M5, and supply M5.
Frequently Asked Questions about VAC1-D8-B:
Q: What type of speed command input does the VAC1-D8-B spindle drive accept?
A: The VAC1-D8-B spindle drive uses an analog speed command input for motor control.
Q: Is the control ground on the VAC1-D8-B spindle drive isolated or non-isolated?
A: The control ground on the VAC1-D8-B is isolated to minimize interference with other control signals.
Q: What types of monitor outputs are available on the VAC1-D8-B spindle drive?
A: This spindle drive is equipped with VEL ±10 V and TQ ±10 V monitor outputs for easy signal monitoring.
Q: What motor signal connectors are used on the VAC1-D8-B spindle drive?
A: The VAC1-D8-B includes 16-pin, 10-pin, and 9-pin connectors for motor signals.
Q: What is the processor width of the VAC1-D8-B spindle drive?
A: This model features a processor with 16-bit width for its internal operations.
