HEIDENHAIN LS187 Linear Encoder

Technical Specifications

Model： LS187

Brand： HEIDENHAIN

Product Type: Sealed incremental linear encoder for CNC machine tool position detection

Module Feature:

Function: HEIDENHAIN LS187 large cross-section sealed incremental linear encoder. It captures linear axis incremental position signals, outputs 1Vpp sinusoidal signals to CNC controller, requires homing to establish absolute reference after power cycle. Used for closed-loop position feedback on heavy horizontal boring mills and large machining centers.

Measuring principle: Incremental optical scanning Output Signal: 1 Vpp sinusoidal voltage signal Grating period: 20 μm Onboard components: DIADUR glass scale substrate, scanning head, double lip sealing, built-in signal processing circuit, 14-pin flange connector

LED indicators: POWER, SIG, FAULT diagnostic lights

Hardware self-diagnosis: Signal amplitude monitoring, scanning head signal integrity check

Programming software: HEIDENHAIN proprietary diagnostic software for signal amplitude inspection

Electrical Parameters

Supply voltage: 5VDC ±5%

Power consumption: Max 2.6W

Mechanical & Structure:

Mounting: Scale rail fixed on machine bed, scanning head mounted on slide carriage Protection class: IP67 (scale housing)

Environmental:

Operating temperature: 0℃ ~ +50℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer legacy sealed incremental linear encoder

System compatibility

Compatibility description: LS187 belongs to HEIDENHAIN LS series linear encoder family. 1Vpp sinusoidal output compatible with many CNC controllers including Fives Giddings & Lewis PIC900 system. Widely applied on heavy CNC boring mills.

Function

Function description: LS187 is sealed incremental linear encoder manufactured by HEIDENHAIN. DIADUR glass grating provides stable high-precision incremental position signals. Double lip seal structure protects internal optical components from metal chips, coolant and workshop dust. It transmits sinusoidal position signals to CNC for closed-loop axis control, and needs reference mark homing after power-up. It is legacy linear position measuring spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off CNC and encoder 5VDC power. Mount scale rail parallel to machine travel axis, install scanning head on slide carriage. Adjust gap and parallelism between scanning head and scale. Connect shielded encoder cable to CNC control unit. Restore power, verify POWER and SIG LED indicators, run encoder diagnostic and check position counting.

Interface

Interface list: 14-pin flange socket, 5VDC power terminal,on-board POWER / SIG / FAULT LED indicators for HEIDENHAIN LS187.

Diagnostic

Troubleshooting: No position counting: Check 5VDC power supply, cable breakage or connector pin damage. FAULT LED lit: Low signal amplitude, contamination on glass scale or scanning head misalignment. Position tracking error: Coolant/chip contamination, poor cable shielding or signal amplitude attenuation.

Product Brief

Brief description: LS187 is HEIDENHAIN large profile sealed incremental linear encoder with 1Vpp sinusoidal output,provides high precision linear position feedback for heavy CNC boring mill axis closed loop control,legacy CNC linear scale spare.