E4809-024-019-D Okuma
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The Okuma E4809-024-019-D is an absolute encoder designed for use with OSP Control systems and BL motor mounting. Part of the Absolute Encoders series, it features a Type F encoder, supports 16384 clock pulses per tenth revolution, and a serial feedback interface. The unit operates at a control clock of 81.92 MHz and has a sine/cosine excitation signal with a 5 kHz frequency.
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Product Description:
The E4809-024-019-D is an absolute rotary encoder produced by Okuma within the Absolute Encoders series. It attaches to a BL motor shaft and supplies multi-turn positional data directly to an OSP numerical controller. By combining an upper-digit pulse sensor with a lower-digit MPR sensor, the unit delivers both coarse and fine position feedback so the drive can maintain axis accuracy during continuous machining cycles.
The counting section generates a native resolution of 16384 pulses per tenth of a revolution, allowing the control to resolve angular changes of a few arc-seconds. Internally, position data are updated against a control clock of 81.92 MHz, so high-speed sampling is possible without aliasing during rapid traverse. Rotor excitation is established by a 5 kHz carrier fed through matched sine and cosine windings, and the returning differential pairs create a balanced sine/cosine excitation signal that limits common-mode noise. A rollover counter tracks up to 2048 turns before resetting, which lets the CNC monitor long rotary travel without losing the absolute reference. Type F signal conditioning is used to format the incremental bursts before they reach the serial interface.
The encoder mounts directly to the motor, so the sensing assembly stays aligned with the rotating shaft and the signal path remains compact. Up to 60 kg·cm of twisting moment can be applied to the input shaft without damaging the code disk, and a metric M5 bolt secures the hub to the motor flange. Electrical data leave the encoder over a serial line with an OSP control pinout, eliminating the need for protocol conversion. Installation is simplified because the back plate matches a BL motor mounting face, keeping the optical heads concentric with the rotor. Pulse-type heads on the upper track and the MPR sensor on the lower track work together to transmit velocity and multi-turn position simultaneously, which supports stable interpolation at the control.
Frequently Asked Questions about E4809-024-019-D:
Q: How many clock pulses per tenth revolution does the E4809-024-019-D encoder deliver?
A: The E4809-024-019-D provides 16,384 clock pulses per tenth revolution for high-resolution feedback.
Q: What is the control clock speed of the Okuma E4809-024-019-D encoder?
A: This model operates with a control clock speed of 81.92 MHz to ensure precise encoder communication.
Q: What type of feedback interface is equipped on the E4809-024-019-D encoder?
A: The feedback interface on this encoder is serial, designed for integrated communication protocols.
Q: What control target is the E4809-024-019-D feedback designed for?
A: This encoder is specifically intended to send feedback to OSP Control systems.
Q: What is the excitation signal type used in the E4809-024-019-D encoder?
A: The excitation signal for this encoder utilizes a sine/cosine waveform, supporting its signal processing.
