HEIDENHAIN 594878-01 Linear Encoder Scanning Head

Technical Specifications

Model：594878-01 Brand：HEIDENHAIN Product Type: Incremental optical scanning head for exposed linear encoder

Module Feature

Function: HEIDENHAIN 594878-01 is incremental scanning head for exposed linear scale. It outputs 1Vpp sine/cosine A/B incremental measuring signals with distance-coded reference marks. Adopt single-field optical scanning principle, good anti-pollution performance, stable signal amplitude. It supports high interpolation and high dynamic position acquisition. Widely used on heavy horizontal boring mills, machining centers for linear axis closed-loop position measurement.

Measuring principle: Optical single-field scanning Output Signal: 1 Vpp sine/cosine incremental signals, distance-coded reference marks Onboard components: Optical scanning assembly, signal processing circuit, metal housing, shielded cable and D-sub connector

LED indicators: Not equipped on scanning head body

Hardware self-diagnosis

Signal amplitude test, reference mark detection, optical window inspection, cable continuity monitoring

Programming software

HEIDENHAIN diagnostic software for signal waveform analysis and parameter verification

Electrical Parameters

Supply voltage: 5VDC ±5% Power consumption: ≤150mA

Mechanical & Structure

Mounting: Flange mounting with fixing screws, precise air gap control required between scanning head and linear scale Protection class: IP64 (housing)

Environmental

Operating temperature: -20℃ ~ +70℃ Ambient humidity: 5~85% non-condensing Certification: CE Status: HEIDENHAIN heavy-duty linear scanning head

System compatibility

Compatibility description: 594878-01 scanning head works with matched HEIDENHAIN linear scale and EXE interpolation units supporting 1Vpp sinusoidal input. Suitable for Fives Giddings & Lewis PIC900 CNC heavy boring mill linear feed axis.

Function

Function description: 594878-01 is scanning head manufactured by HEIDENHAIN. It reads grating information from linear scale and converts optical signal into high-quality 1Vpp sinusoidal electrical signals for interpolation. Distance-coded reference marks enable fast axis reference homing. Single-field scanning design reduces sensitivity to dust and cutting fluid. Compact metal housing resists workshop vibration. It is core measuring spare for heavy CNC boring mill linear closed-loop motion control.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off all power supply. Mount scanning head onto machine carriage, adjust air gap and parallelism between head and scale. Connect shielded cable to interpolation unit. Lock all fasteners. Restore power, run signal amplitude test and reference mark detection test.

Interface

Interface list: D-sub connector, 5VDC power and 1Vpp measuring signal terminals, no LED indicators on 594878-01.

Diagnostic

Troubleshooting: No measuring signal: Check 5V power supply, cable breakage or connector pin contact. Weak or distorted signal: Optical window contamination or incorrect air gap. Intermittent signal loss: Loose mounting screws or cable abrasion.

Product Brief

Brief description: 594878-01 HEIDENHAIN incremental optical scanning head for exposed linear scale,1Vpp sine/cosine output with distance-coded reference marks,used for linear axis position measurement of heavy CNC boring mill,linear encoder spare.