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　　UM111BD Other Names:

　　Inverter Module UM111BD

　　UM111BD Inverter Module

　　Servo Drive UM111BD

　　Core Features

　　Modular Architecture and Power Configuration

　　Belongs to the UM 1xx D series, supporting multi-axis (up to 13 axes) and spindle drive. Power supply range is 22kW-125kW, spindle power up to 40kW, feed axis motor torque covers 0.4Nm-120Nm, and spindle motor power is 5.5kW-40kW.

　　Power modules must be arranged according to the "larger on the left, smaller on the right" rule to ensure system stability; the total motor power must not exceed the rated capacity of the power supply unit to avoid current overload.

　　Compatible with Heidenhain servo motors (QSY feed axis motors: 0.4-120Nm; QAN spindle motors: 5.5-40kW), and adaptable to various encoder interfaces such as EnDat 2.1, 1Vpp, TTL, and HTL. Supports incremental/absolute grating rulers (e.g., UM 111BD grating ruler with accuracy ±3μm, signal period 20μm, IP53 protection rating, and a maximum speed of 120m/min).

　　Power modules are arranged with larger modules on the left and smaller modules on the right to ensure system stability; electronic identification tags provide advanced diagnostic functions.

　　Rated voltage 380V, compatible with Heidenhain servo motors (e.g., QAN spindle motors 5.5kW-40kW). Total motor power should not exceed the rated capacity of the power supply unit to avoid overload.

　　Integrated electronic identification tags support advanced diagnostic functions for easy and rapid fault location.

　　High Precision and Dynamic Performance

　　Compatible with HEIDENHAIN synchronous motors, optimized rotational inertia design achieves consistent torque and excellent speed stability across the entire speed range, meeting the requirements of high-speed cutting (up to 120m/min) and micron-level positioning.

　　Integrated electronic identification tags support advanced diagnostic functions for easy troubleshooting and maintenance.

　　Cooling and Heat Dissipation Design

　　Water-cooled inverter components are recommended for high-power applications. Coolant/water initial temperature should be 20°C-40°C. A separate distributor connected to a closed-loop water-cooling system is required. High-power modules (such as UM116D) require additional fan cooling and must have reserved space in the electrical cabinet.

　　Electrical Compatibility and Protection

　　Rated voltage 380V, requires matching power supply unit capacity; DC 15V/24V power supply current consumption must be checked. If limits are exceeded, an external +24V power supply is required.

　　Features overload protection, electrostatic interference protection, and grounding fault detection functions to ensure safe equipment operation.

　　Compact Design and Optimized Heat Dissipation

　　Compact size and low heat generation make it suitable for dense installation in electrical cabinets. High-power modules (such as UM116DW/UM117DW) support water-cooling systems, connected to closed-loop water cooling via an independent distributor. The initial coolant temperature is 20°C-40°C, ensuring stable operation under high loads.

　　High Precision and Reliability

　　Equipped with Heidenhain encoders (such as the UM111BD linear encoder, accuracy ±3μm, signal period 20μm, IP53 protection), it achieves micron-level positioning accuracy, suitable for demanding applications such as five-axis CNC machine tools, electronic component placement production lines, and high-speed elevator drives.

　　Supports advanced functions such as CS-axis control and rigid tapping, ensuring spindle speed and feed synchronization and preventing abnormal vibration or positioning jitter.

　　Compatibility and Expandability

　　Can be paired with different power modules (such as UM113D/UM114D) and power supply units (22kW-125kW) to adapt to diverse drive requirements from the feed axis to the spindle.

　　Supports serial/parallel interfaces, compatible with CNC systems (such as FANUC and Siemens) and I/O Link buses, enabling flexible integration.

　　Usage and Operation Specifications

　　Installation and Configuration

　　Location Selection: Install away from vibration sources, ensuring minimal distance between the encoder and the object being measured to avoid signal interference; the spindle drive module must be installed horizontally to ensure unobstructed heat dissipation.

　　Electrical Connection: Use dedicated serial/parallel cables to connect the encoder and driver; the interface must be secure; the power input terminal (e.g., TB1 terminal) must be connected to a DC 300V power supply, and a DC 24V control signal must be connected in series through the CXA2B/CXA2A terminals.

　　Parameter Settings: Configure the encoder type (linear/rotary), signal period, reference point mode, counting direction, and error monitoring parameters (e.g., frequency/contamination detection) through the CNC system or dedicated software (e.g., HEIDENHAIN ND280).

　　Debugging and Operation

　　Initialization: After power-on, the PIL green light illuminates, and the digital tube displays the ROM series number and version number. After NC startup, the digital tube flashes "-" while waiting for parameter loading. Once loading is complete, "00" is displayed, indicating successful motor excitation.

　　Calibration: Perform zero-point calibration, position calibration, and dynamic response testing to ensure the spindle speed matches the command value and avoid overload or abnormal vibration.

　　Monitoring: Monitor the operating status in real time via status indicator lights (PIL/ALM/ERR) and digital tube alarm codes. A red ALM light indicates a fault, requiring troubleshooting based on alarm codes (e.g., overload, abnormal encoder feedback, power failure, etc.).

　　Operation and Maintenance

　　Daily Operation: Automatically adjust speed according to CNC system commands, supporting stepless speed change and integration with ATC (Automatic Tool Change). During high-speed cutting, monitor the spindle load meter to ensure power remains within a constant power range.

　　Maintenance: Regularly clean surfaces and connections, check for wiring aging; update software to optimize performance; avoid overload operation and adhere to safety procedures.

　　Troubleshooting:

　　No alarm but spindle malfunction: Check cutting speed, forward/reverse frequency, motor/drive malfunction, mechanical speed change device, and drive belt.

　　ALM light on: Based on the alarm codes displayed on the digital display (e.g., 01 motor overheating, 02 abnormal speed, 03 DC bus blown), check for problems with the power supply, motor, encoder, or parameter settings.

　　ERR light on: Check for incorrect parameter settings, operational control logic, or connection problems with external devices (e.g., the CNC system).

　　Parameter Configuration and Debugging:

　　Initial Setup: After power is connected, the PIL green light illuminates, and the digital display shows the ROM series number (e.g., "00" corresponds to the 9D00 series) and version number; after NC startup, parameters are automatically loaded, and the digital display shows "00" after motor excitation.

　　Parameter Adjustment: Set the speed, acceleration/deceleration time, feedback signal gain, etc., through the CNC system; ensure the total motor power does not exceed the rated capacity of the power supply unit to avoid overload.

　　Fault Diagnosis: Utilize ALM/ERR lights and digital display alarm codes (e.g., 01-Motor Overheating, 02-Speed Deviation) to locate problems. Refer to the diagnostic manual to troubleshoot power phase loss, encoder failure, and mechanical transmission abnormalities.

　　Operation and Maintenance

　　Daily Operation: Monitor the spindle load gauge to ensure cutting parameters (speed, feed) are within the optimal range; avoid frequent forward/reverse rotation and overload cutting.

　　Maintenance: Regularly check the cooling system (water-cooled/air-cooled), drive belts, and hydraulic cylinder limit switches; clean the electrical cabinet to ensure it is free of dust/emulsion corrosion; use original manufacturer diagnostic tools to check module status.

　　Troubleshooting: If the ALM light is on, check the motor, driver, and power module according to the alarm code; if the ERR light is on, check parameter settings or operational errors; if there are no alarms but the spindle is abnormal, check the mechanical speed changer, speed measuring device, or feedback signal disconnection.

　　Application Scenarios and Advantages

　　High-end Manufacturing: Widely used in five-axis CNC machine tools, aero-engine blade machining, semiconductor chip manufacturing, and new energy battery packaging, ensuring micron-level precision and high dynamic response.

　　System Collaboration: Often used in conjunction with HEIDENHAIN encoders (such as linear scales and magnetic sensors) to achieve closed-loop control, improving positioning accuracy and vibration resistance.

　　Upgrading Existing Equipment: Compatible with existing German-made machine tools (such as DMG and HAUSER), extending equipment lifespan and reducing downtime costs through modular design.

　　Summary: The HEIDENHAIN UM111BD spindle drive module, with its high precision, modular design, and reliable performance, has become a key drive component in high-end manufacturing. Proper installation, parameter configuration, and regular maintenance are crucial for ensuring long-term stable operation. Troubleshooting requires comprehensive analysis of status indicator lights, alarm codes, and system logs.

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