Model Code Definition

DKR = DIAX02 high-current spindle dedicated drive series

02 = 2nd generation DIAX hardware platform

.1 = Hardware Revision Release 1

W = Built-in axial fan forced air cooling

300 = Continuous rated output current 300Arms

B = Internal integrated bleeder brake chopper

BE = SERCOS fiber digital CNC mainboard

79 = Dual stacked composite mainboard(DSS02.1M+DZF03.1M): four-channel mixed feedback + expandable modular IO + multi-master electronic gearing + redundant spindle safety monitoring + extended C-axis positioning logic, U2/U3/U4 spare slots for optional expansion cards

01 = Standard fixed factory hardware configuration

-FW = Front slot factory pre-mounted DSM firmware memory card, official standard spindle firmware pre-programmed, no blank slot

Technical Specifications

Input Power:3Φ AC400~480V ±10%,50/60Hz; isolated DC24V auxiliary control power supply

DC Bus Nominal Voltage:700VDC

Output Rating:Continuous 300A RMS;250% overload sustain 300ms,300% instantaneous peak overload;max output frequency1200Hz,match max 93kW spindle motor;switching frequency optional4kHz/8kHz(derate 141A@4kHz,110A@8kHz)

Braking Parameter:B-type built-in bleeder continuous dissipation≈43kW;external high-power braking resistor required for frequent heavy inertia emergency stop

Cooling:Built-in blower forced convection,total internal power loss≈1820W

Protection Class:IP20(IEC),vertical cabinet exclusive installation

Ambient Operation:0~+45℃ full load(auto derate above45℃);storage -30~+85℃;altitude≤1000m;RH＜90% non-condensing non-condensation

Dimension & Weight:H1065×W468×D392mm,net weight≈60.2kg

Interface & Communication Configuration

Power Terminals:Heavy-duty L1/L2/L3 mains input, U/V/W high-current motor output terminals

Command Bus(BE79):Full digital SERCOS fiber optic bus for CNC speed/torque setpoint transmission

Feedback Ports:Four independent 15pin D-SUB for sine encoder/resolver/HTL/TTL four-type mixed feedback(unique BE79 four-channel design)

IO Layout:Onboard fixed 18DI/14DO base digital IO;U2/U3/U4 vacant slots for optional extension IO/feedback plug-in modules

Slot Distribution:U1 fixed pre-install BE79 dual stacked mainboard;front dedicated slot pre-plugged DSM-FW memory card

Debug Port:Front RS232 serial for IndraWorks parameter tuning,fault diagnosis,firmware upgrade

Auxiliary Terminals:Drive enable,hardware E-stop,motor thermal protection,spindle brake interlock,fault relay dry contact,drive ready status terminal

Core Functions

Full digital three-loop closed-loop regulation(position/speed/torque) optimized for heavy redundant spindle loads;preloaded factory FW unlock full embedded functions:high-precision C-axis arbitrary indexing,rigid tapping,multi-spindle electronic synchronization,four-feedback redundant fault auto-switchover,multi-axis master-slave electronic gearing. Complete multi-layer protection(overcurrent,DC bus over/undervoltage,power module overtemperature,feedback loss,cooling fan malfunction) with front LED fault code display;preloaded FW supports one-click full parameter backup/copy for quick drive replacement without repeated motor auto-tuning。

Application Fields

Oversized heavy vertical/horizontal CNC machining center main spindle,multi-spindle compound processing equipment,high-power gravure rotary printing main drive,heavy metallurgy winding spindle,high-end precision textile winding machine,imported legacy heavy-duty machine tool CNC retrofit project。

Operation & Maintenance Instructions

Strictly connect rated three-phase AC400~480V industrial power;single-phase input triggers persistent DC bus undervoltage alarm and output locking.

Reserve ≥100mm upper/lower ventilation clearance inside cabinet to guarantee blower air circulation,prevent overheating shutdown or power derating.

Built-in B-type bleeder meets conventional regular deceleration;install external high-power braking resistor under frequent heavy-load emergency braking to avoid DC bus overvoltage tripping.

Commissioning requires matching SERCOS version IndraWorks software;BE79 dual-board FW cannot be interchanged with single-board BE series firmware program.

Pre-installed FW card stores factory default spindle parameters;backup machine modified parameters via IndraWorks before drive maintenance;if FW card damaged,match exclusive BE79 dedicated firmware card for replacement only.