HEIDENHAIN EQN 1325.001-2048 Absolute Rotary Encoder

Technical Specifications

Model：EQN 1325.001-2048 Brand：HEIDENHAIN Product Type: Bearing-integrated absolute rotary encoder for CNC spindle

Module Feature

Function: HEIDENHAIN EQN 1325 absolute rotary encoder. It detects spindle angular position and rotational speed, delivers singleturn absolute data via EnDat01 serial interface. Tapered 9.25mm 1:10 shaft design for direct motor mounting. 2048 incremental lines per revolution. Max mechanical speed up to 12000 rpm. Widely applied on heavy horizontal boring mills, machining centers and high-speed spindle systems.

Measuring principle: Absolute optical scanning Incremental lines: 2048 lines per revolution Interface: EnDat 01 Shaft specification: Tapered shaft 9.25mm, taper ratio 1:10 Onboard components: Optical grating disc, scanning assembly, precision bearing, metal housing, 12-pin connector

LED indicators: POWER, COM, FAULT diagnostic lights

Hardware self-diagnosis

Encoder internal temperature monitoring, signal amplitude detection, EnDat communication fault diagnosis

Programming software

HEIDENHAIN diagnostic software for encoder parameter reading and fault log checking

Electrical Parameters

Supply voltage: 3.6VDC ~14VDC Power consumption: Max 0.8W

Mechanical & Structure

Mounting: Tapered shaft directly fitted onto spindle Protection class: IP40 (housing)

Environmental

Operating temperature: -40℃ ~ +115℃ Ambient humidity: 5~85% non-condensing Certification: CE Status: HEIDENHAIN high-speed spindle absolute rotary encoder

System compatibility

Compatibility description: EQN1325 belongs to HEIDENHAIN EQN1300 encoder family, EnDat01 interface. Compatible with HEIDENHAIN CC series control units. Suitable for Fives Giddings & Lewis PIC900 CNC heavy boring mill spindle axis.

Function

Function description: EQN 1325 is absolute rotary encoder manufactured by HEIDENHAIN. The 1:10 tapered shaft realizes rigid connection and minimizes mechanical backlash. Absolute position data can be read immediately after power-up without reference homing. Robust structure withstands high spindle rotation and mechanical vibration. It is high precision spindle measuring spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off encoder DC power. Install encoder onto tapered spindle shaft and secure locking assembly. Connect shielded EnDat encoder cable to servo control unit. Restore power, verify LED indicators, run encoder test and spindle orientation calibration.

Interface

Interface list: 12-pin connector, DC power and EnDat signal terminals,on-board POWER / COM / FAULT LED indicators for HEIDENHAIN EQN 1325.001-2048.

Diagnostic

Troubleshooting: No encoder communication: Check 3.6~14V DC supply, cable breakage or connector pin damage. FAULT LED lit: EnDat communication timeout, low signal amplitude, over-temperature or shaft misalignment. Spindle orientation error: Shaft runout, loose mounting or grating surface contamination.

Product Brief

Brief description: EQN 1325.001-2048 HEIDENHAIN tapered-shaft absolute rotary encoder with EnDat01 interface and 2048 lines,provides absolute spindle angular position and speed feedback for heavy CNC boring mill spindle closed-loop control,spindle encoder spare.