1. General Introduction

2. Electrical & Hardware Specifications

• Input Power: DC24V ±10V, supplied from system internal switching power supply module

• Onboard configuration: built-in main CPU chip, system program ROM, user RAM memory, servo bus drive circuit, I/O signal processing circuit and dedicated panel communication interface

• External connectors: multi-pin terminal sockets for servo drive bus, operator panel cable, machine peripheral I/O terminal block

• PCB dimension: approx 310mm × 225mm; net weight ~0.95kg

• Working ambient voltage fluctuation tolerance: ±10% for rated input power

3. Core Functional Description

1. NC Motion Calculation: Process G-code machining programs, generate position commands for each feed axis & spindle servo drive, realize interpolation control of linear/circular machining paths

2. PLC Logical Control: Execute built-in machine ladder logic, manage peripheral auxiliary equipment including coolant pump, spindle brake, automatic tool changer, door interlock and limit switch signal processing

3. HMI Data Interaction: Transmit coordinate, program, parameter and alarm data bidirectionally with JZNC-OP15/OP16 front operation panel via dedicated communication cable

4. Parameter Storage & Management: Store system servo parameters, machine geometry data, tool compensation values and user NC part programs on onboard memory chip

5. Fault self-diagnosis: Detect abnormal signals of servo, I/O circuit and communication link, send corresponding alarm codes to display on operator panel once fault occurs

4. Environmental Operation Requirements

• Operating temperature: 0℃ ~ +55℃ inside sealed CNC control cabinet; storage temperature: -25℃ ~ +75℃

• Humidity range: 10%~88%RH without condensation; strictly avoid cutting fluid vapor, oil mist, conductive dust and corrosive gas inside cabinet

• Anti-interference requirement: Keep away from high-power contactor, inverter and welding equipment to prevent strong electromagnetic surge damage to onboard circuit

5. Replacement & Installation Steps

1. Cut off total machine AC input power completely, wait more than 10 minutes for cabinet internal power supply capacitor full discharge

2. Mark definition for all plug-in connectors on RK32 board before unplugging servo bus, panel communication and I/O wiring one by one

3. Remove fixed mounting screws on PCB fixing base and extract original JZNC-RK32 board from cabinet card slot

4. Insert new replacement board into original installation slot and fasten all fixing screws tightly

5. Recover all connectors strictly following pre-marked labels; power on equipment after wiring completion, verify system boot-up, panel communication and axis jog function before formal production

6. Common Fault Troubleshooting

1. System no boot / operator panel no display: Inspect DC24V input power supply, loose plug connectors and onboard fuse burnout of RK32 mainboard

2. Panel display normal but axis cannot jog: Check servo bus wiring contact failure or mainboard servo output circuit damage

3. Random system alarm & intermittent communication loss: Troubleshoot poor cabinet heat dissipation leading to overheating or aged onboard memory component

7. Safety Notes

• Forbid plug/unplug onboard connectors under powered status to avoid instantaneous overvoltage burning PCB circuit

• All maintenance and component replacement must be operated by professional maintenance personnel familiar with Yasnac LX3/MX3 system

• Do not arbitrarily modify original onboard circuit wiring or replace non-standard electronic components on mainboard