Product Description:

The E4809-045-158-B is a servo processor board released by Okuma within the E4809 CNC Boards series. Installed in an Okuma CNC rack, the board coordinates current-loop calculations for connected servo axes and transfers position data to the matched amplifier group. By executing these real-time tasks, the module links the numerical control kernel to the brushless BL-II drive amplifiers that move each machine slide.

The onboard CPU operates at 16 MHz, providing adequate instruction bandwidth for interpolation and error compensation routines. Memory access uses a 3/3-clock read/write cycle, so parameter retrieval and update times remain consistent even when axis loads fluctuate. The node address on the backplane is set with an SW1 4-bit address DIP switch, allowing up to sixteen SVP modules to coexist without line conflicts. Command and feedback signals flow through an interface for BL-IID amplifiers that carries pulse-width duty data for torque commands and returns velocity information for closed-loop regulation. Field wiring enters through four front connectors, separating encoder, power, and control conductors to reduce crosstalk during rapid motion.

The board functions as a servo processor, so its processing role focuses on servo regulation rather than spindle or I/O control. It can coordinate up to 3 axes, making it suitable for the motion requirements of compact turning centers or small machining cells. The module has no AD/DA function and therefore relies on digital links for motion commands, eliminating the signal drift that can occur in analog stages. An integrated encoder interface receives quadrature or serial feedback without requiring external converters. Inductosyn and PG/PH interfaces are omitted from this SVP board revision, keeping its circuitry dedicated to the incremental and absolute encoder families used with compatible Okuma systems.