HEIDENHAIN LS403 Linear Encoder

Technical Specifications

Model：LS403 ML1140mm Brand：HEIDENHAIN Product Type: Sealed incremental optical linear encoder

Module Feature

Function: HEIDENHAIN LS403 sealed incremental linear scale. It outputs 1Vpp sine/cosine incremental signals for linear position and speed measurement. Measuring length ML=1140mm, integrated dual sealing lips for dust and coolant protection. Wide scanning area improves signal stability under slight contamination. Widely used on heavy horizontal boring mills, machining centers and grinding machines.

Measuring principle: Incremental optical interferential scanning Measuring length: 1140 mm Output Signal: 1 Vpp sine/cosine incremental signals Max traversing speed: 120 m/min Onboard components: DIADUR glass grating, scanning carriage, aluminum extrusion housing, double sealing lips, cable connector

LED indicators: POWER, SIG, FAULT diagnostic lights

Hardware self-diagnosis

Signal amplitude monitoring, contamination detection, reference mark signal inspection

Programming software

HEIDENHAIN diagnostic software for signal quality verification and mounting optimization

Electrical Parameters

Supply voltage: 5VDC ±10% Power consumption: Max 2.8W

Mechanical & Structure

Mounting: Scale housing fixed to machine bed; scanning carriage mounted on moving slide Protection class: IP67 (housing)

Environmental

Operating temperature: 0℃ ~ +70℃ Ambient humidity: 5~85% non-condensing Certification: CE Status: HEIDENHAIN sealed incremental linear encoder

System compatibility

Compatibility description: LS403 belongs to HEIDENHAIN LS400 sealed linear encoder family, compatible with HEIDENHAIN EXE interpolation units. Suitable for Fives Giddings & Lewis PIC900 CNC heavy boring mill feed axis.

Function

Function description: LS403 is sealed incremental linear encoder manufactured by HEIDENHAIN. The enclosed aluminum housing and double sealing lips protect internal optical grating from metal chips, cutting fluid and oil mist. Reference mark signal is required for axis homing after power-up. Compact profile allows installation in limited machine space. It is high precision linear measuring spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off encoder 5VDC power. Mount scale housing parallel to travel axis. Install scanning carriage on slide, adjust scanning gap and parallelism. Connect shielded encoder cable to interpolation unit. Restore power, verify LED indicators, run signal test and axis homing calibration.

Interface

Interface list: Multi-pin connector, 5VDC power and 1Vpp signal terminals,on-board POWER / SIG / FAULT LED indicators for HEIDENHAIN LS403 ML1140mm.

Diagnostic

Troubleshooting: No position reading: Check 5V supply, cable breakage or connector pin damage. FAULT LED lit: Low signal amplitude, seal damage or grating contamination. Intermittent position jump: Vibration, mounting parallelism error or worn sealing lip.

Product Brief

Brief description: LS403 ML1140mm HEIDENHAIN sealed incremental linear encoder with 1140mm measuring length and 1Vpp output,provides linear position feedback for heavy CNC boring mill feed axis closed-loop control,linear scale spare.