HEIDENHAIN ERN1387.3233-2048 Incremental Rotary Encoder

Technical Specifications

Model：ERN1387.3233-2048 Brand：HEIDENHAIN Product Type: Bearing-integrated incremental optical rotary encoder with stator anti-rotation coupling

Module Feature

Function: HEIDENHAIN ERN1387.3233-2048 incremental rotary encoder with built-in precision bearing and stator coupling assembly. It generates 1Vpp sine/cosine A/B/Z incremental signals for angular position and rotational speed measurement. It has 2048 incremental lines per revolution. The 9.25mm 1:10 tapered shaft adopts friction locking installation, and the anti-rotation coupling compensates axial mounting tolerance up to ±0.5mm. Widely used on heavy horizontal boring mills, machining centers and high-performance spindle servo drive systems.

Measuring principle: Incremental optical scanning Incremental lines: 2048 lines per revolution Output Signal: 1 Vpp sine/cosine incremental signals + reference mark Z pulse Max mechanical rotational speed: 12000 rpm Onboard components: Optical grating disc, scanning unit, precision bearing, metal housing, 14-pin M23 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 verification and mounting adjustment

Electrical Parameters

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

Mechanical & Structure

Mounting: 1:10 tapered shaft fitted onto spindle rotor, anti-rotation stator coupling Protection class: IP40 (housing)

Environmental

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

System compatibility

Compatibility description: ERN1387 series belongs to HEIDENHAIN ERN1300 encoder family, compatible with HEIDENHAIN EXE interpolation units and mainstream CNC systems supporting 1Vpp signals. Suitable for Fives Giddings & Lewis PIC900 CNC heavy boring mill spindle and servo axis.

Function

Function description: ERN1387.3233-2048 is incremental rotary encoder manufactured by HEIDENHAIN. The integrated bearing and stator coupling reduce mechanical stress and installation backlash. Reference mark Z pulse is required for axis homing after power-up. Optical scanning delivers high-quality sine/cosine signals for interpolation. Robust housing withstands mechanical vibration and temperature fluctuation in machine tool workshop. 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. Fit encoder tapered shaft onto spindle rotor and tighten friction locking ring. Fix anti-rotation stator assembly to prevent encoder housing rotation. Connect shielded encoder cable to interpolation or servo control unit. Restore power, verify LED indicators, run signal test and spindle homing calibration.

Interface

Interface list: M23 14-pin circular connector, 5VDC power and 1Vpp incremental signal terminals,on-board POWER / SIG / FAULT LED indicators for HEIDENHAIN ERN1387.3233-2048.

Diagnostic

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

Product Brief

Brief description: ERN1387.3233-2048 HEIDENHAIN bearing-integrated incremental rotary encoder with 1:10 tapered shaft, 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.