HEIDENHAIN ERN1387 2048 Incremental Rotary Encoder

Technical Specifications

Model：ERN1387 2048 Brand：HEIDENHAIN Product Type: Bearing-integrated incremental optical rotary encoder for CNC spindle and servo motor

Module Feature

Function: HEIDENHAIN ERN1387 2048 incremental rotary encoder equipped with built-in precision bearing. It generates 1Vpp sine/cosine incremental signals and reference mark pulse for angular position and rotational speed measurement. It has 2048 incremental lines per revolution. Compact metal flange housing supports direct installation on spindle or servo motor. Widely applied on heavy horizontal boring mills, machining centers and high-performance servo drive systems.

Measuring principle: Incremental optical scanning Incremental lines: 2048 lines per revolution Output Signal: 1 Vpp sine/cosine incremental signals + reference mark Max mechanical speed: 12000 rpm Onboard components: Optical grating disc, scanning assembly, precision bearing, metal housing, multi-pin connector

LED indicators: POWER, SIG, FAULT diagnostic lights

Hardware self-diagnosis

Signal amplitude monitoring, reference mark detection, signal integrity inspection

Programming software

HEIDENHAIN diagnostic software for signal quality check and parameter monitoring

Electrical Parameters

Supply voltage: 5VDC ±10% Power consumption: Max 130mA

Mechanical & Structure

Mounting: Flange mounting on servo motor or spindle shaft Protection class: IP40 (housing)

Environmental

Operating temperature: -40℃ ~ +120℃ Ambient humidity: 5~85% non-condensing Certification: CE Status: HEIDENHAIN heavy-duty incremental rotary encoder

System compatibility

Compatibility description: ERN1387 series belongs to HEIDENHAIN ERN1300 encoder family, compatible with HEIDENHAIN EXE interpolation units. Suitable for Fives Giddings & Lewis PIC900 CNC heavy boring mill spindle and servo axis.

Function

Function description: ERN1387 2048 is incremental rotary encoder manufactured by HEIDENHAIN. Integrated precision bearing reduces mechanical installation error. Reference mark pulse is required for axis homing after power-up. Robust mechanical structure can withstand workshop vibration and temperature variation. It delivers high-resolution position feedback for spindle closed-loop control. It is high precision rotary measuring spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off encoder 5VDC power. Mount ERN1387 encoder onto motor shaft and fasten fixing screws. Connect shielded encoder cable to interpolation or servo control unit. Restore power, verify LED indicators, run signal test and axis homing calibration.

Interface

Interface list: Multi-pin connector, 5VDC power and 1Vpp incremental signal terminals,on-board POWER / SIG / FAULT LED indicators for HEIDENHAIN ERN1387 2048.

Diagnostic

Troubleshooting: No encoder signal: Check 5V power supply, cable breakage or connector pin damage. FAULT LED lit: Low signal amplitude, grating contamination or shaft misalignment. Intermittent position jump: Vibration, loose mounting or internal bearing wear.

Product Brief

Brief description: ERN1387 2048 HEIDENHAIN bearing-integrated incremental rotary encoder with 2048 lines and 1Vpp output,provides angular position and speed feedback for heavy CNC boring mill spindle and servo motor closed-loop control,rotary encoder spare.