E4809-045-084G Okuma
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The Okuma E4809-045-084G is a VAC-Board-B type board from the E4809 CNC Boards series designed for spindle drive control. It features 13 numbered status LEDs, three operation status LEDs labeled M1-M3, and is equipped with six dip switches and three trim pots. The board measures 49 cm in length, 31 cm in width, and 5 cm in height.
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Product Description:
The E4809-045-084G is a dedicated printed-circuit board produced by Okuma within the E4809 CNC Boards series. Installed inside the electrical cabinet of an Okuma machining center, the board interfaces directly with the drive unit that powers the spindle motor. By processing speed commands and feedback, it supports closed-loop regulation that keeps the spindle at the requested rpm during cutting operations. That control path lets the spindle respond to load changes as the tool enters or leaves the workpiece, helping the machine maintain stable cutting conditions and consistent surface quality across repeated cycles.
The board is designated VAC-Board-B, a name used for this VAC power-interface layout. Its assigned role is Spindle Drive Control, so its signal paths are intended for the VAC spindle amplifier rather than axis drives or general I/O cards. Six miniature DIP switches labeled SW1-SW6 allow selection of gain, direction, or alarm-mask settings without soldering, which makes small setup changes possible directly on the board. The assembly rises only 5.0 cm, and its front-to-back length is 49.0 cm, which allows installation in a low-profile card slot while keeping connector access practical at the backplane edge. The compact profile also helps the board fit crowded control racks where airflow and cable clearance must be preserved.
Visual diagnostics use 13 numbered status LEDs to indicate power, alarm, and logic states during operation. Three labeled indicators marked M1-M3 show real-time spindle-loop operating modes, so changes in control state can be seen directly at the card face. Fine adjustment is handled by three multi-turn trim potentiometers tagged VR1-VR3, and each one can set an analog reference such as current limit or acceleration slope. The board has a lateral width of 31.0 cm, so it fills a single rack bay while leaving adjacent slots accessible for option boards or communication modules.
Frequently Asked Questions about E4809-045-084G:
Q: Why does E4809-045-084G have edge connectors?
A: The edge connectors on the E4809-045-084G allow interfacing with external systems or submodules, enhancing connectivity flexibility.
Q: Does E4809-045-084G use a microcontroller or DSP?
A: Yes, E4809-045-084G features a microcontroller or DSP, enabling real-time signal processing and efficient system control.
Q: How does the E4809-045-084G handle power?
A: The E4809-045-084G operates with ~15V or 24V, providing stable power for digital and analog components.
Q: Do the DB connectors on E4809-045-084G support serial communication?
A: Yes, the DB25 and DB15 connectors on E4809-045-084G support serial and parallel communication, offering versatile interfacing options.
Q: Why are there test points and LEDs on E4809-045-084G?
A: The test points and LEDs provide diagnostic indicators for system monitoring and troubleshooting, ensuring reliable performance.
