Model Code Definition

DKR = DIAX02 dedicated spindle servo drive product series

02 = 2nd generation DIAX hardware platform

.1 = Hardware revision Release 1

W = Internal axial blower forced air cooling design

300 = Continuous rated output current: 300Arms

B = Onboard embedded internal bleeder brake chopper for routine regenerative energy dissipation

BE = SERCOS fiber-optic digital bus mainboard for CNC optical fiber command transmission

23 = Hardware configuration code: Sine-wave incremental encoder + resolver dual feedback, built-in dedicated C-axis positioning, rigid tapping & electronic gearing synchronization circuit

01 = Factory fixed standard hardware configuration version

FW = Factory pre-mounted pluggable firmware memory card for full parameter backup & cross-unit data migration

Technical Specifications

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

DC Bus Nominal Voltage:700VDC

Output Rating: Continuous 300A RMS; 250% overload sustain 300ms, 300% short peak overload; max output frequency 1200Hz, matches up to 93kW heavy spindle motor; optional switching frequency 4kHz/8kHz (continuous current derate to 141A@4kHz,110A@8kHz)

Braking Performance: B-type integrated internal bleeder with continuous regenerative dissipation ~43kW; external high-power braking resistor required only for frequent heavy inertia emergency stop

Cooling: Built-in blower forced convection, total internal power loss approx.1800W

Protection Class: IP20 (IEC standard), vertical cabinet mounting only

Ambient Condition: Full-load operating 0~+45℃ (auto power derating above 45℃); storage -30~+85℃; install altitude ≤1000m; relative humidity＜90% non-condensing

Dimension & Weight: H1065×W468×D392mm, net weight 59.87kg

Interface & Communication Configuration

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

Command Interface(BE23): Full digital SERCOS fiber bus, optical fiber link to upper CNC controller for speed/torque setpoint transmission

Feedback Ports: Two independent 15pin D-SUB connectors for sine incremental encoder and resolver feedback signals

Slot Layout: U1 fixed slot pre-installed BE23 SERCOS control board; U2/U3/U4 empty spare slots for optional digital I/O or extended feedback modules

Debug Port: Front panel RS232 serial port for IndraWorks parameter setting, fault diagnosis and firmware upgrade

General I/O Terminals: Drive enable, hardware E-stop, motor thermal protection, spindle brake interlock, fault relay dry-contact output, drive ready status output terminals

Exclusive FW Card Slot: Front dedicated slot with factory pre-inserted FW memory card for one-click full parameter backup & replication

Core Functions

Three closed-loop full digital regulation (position/speed/torque) optimized for heavy spindle load; embedded C-axis indexing, rigid tapping and high-precision electronic gearing functions in base firmware. Built-in B brake chopper reduces external wiring for normal deceleration. Complete multi-layer fault protection against overcurrent, DC bus over/undervoltage, module overtemperature, feedback loss and cooling fan failure with front LED fault code indication. Pre-installed FW card enables full parameter copy when replacing spare drive, eliminating repeated motor auto-tuning and on-site commissioning.

Application Fields

Large vertical/horizontal CNC machining center main spindle drive, high-power gravure printing main transmission, heavy textile winding spindle, forging & metallurgy main drive and legacy heavy machine tool CNC upgrade engineering.

Operation & Maintenance Instructions

Strictly apply rated 3Φ AC400~480V industrial input; single-phase power input triggers persistent DC bus undervoltage alarm and output lockout.

Reserve ≥100mm upper/lower ventilation clearance inside cabinet to ensure blower airflow and avoid overtemperature shutdown.

B-type internal bleeder covers regular deceleration; install external high-power braking resistor under frequent heavy-load emergency braking to prevent overvoltage trip.

Parameter commissioning needs matched SERCOS-version IndraWorks software; BE-series SERCOS board firmware cannot interchange with BA analog control card firmware.

Drive replacement operation: pull original FW memory card and insert into new spare unit to instantly restore all stored parameters without re-commissioning.