The NUM1050 is a high-performance, open CNC system that leverages a 64-bit CPU for fast processing and precise position control. It supports both basic RS232C serial communication and advanced FIPWAY network communication, making it versatile for different application needs. The system offers user-friendly parameter settings, program loading, and tool management, enhancing operational efficiency. Below is an overview of the electrical control system for a three-axis gantry milling machine using the NUM1050 and NUMDRIVE.
The machine features three linear axes—X, Y, and Z—with the X-axis having a maximum stroke of up to 10.5 meters. All three axes are equipped with HEIDEHAIN linear encoders (1Vpp sine wave) for full closed-loop feedback, ensuring high accuracy. The spindle is an electric motor, providing smooth and efficient operation. To meet the demands of flexible manufacturing systems and DNC (Direct Numerical Control), the system includes an FIPWAY network communication module.
Each axis is driven by BPH motors: X-axis at 36 N·m, 200 rpm; Y and Z axes at 17 N·m, 200 rpm. A Schneider inverter is used for motor control, while the NUM1050 provides a comprehensive set of I/O modules. The operator panel features 39 customizable keys, offering direct access to frequently used functions. These keys are optically connected to the system, ensuring reliable operation.
The system includes 32 input modules with LED indicators, supporting various signal types including proximity sensors. The 24-bit output relay module can handle up to 8A, effectively controlling solenoids and contactors. Additionally, the analog input/output and external interrupt interface (IT/ANA) provide flexibility for integrating other devices. For example, the analog output is used to control the spindle inverter, enabling seamless speed control of the electric spindle.
The NUM1050 comes with powerful software tools such as PLCTOOL, SETTOOL, MMITOOL, and PCKITTOOL, all built on the Windows platform. These tools simplify PLC programming, parameter tuning, and system diagnostics. Position compensation software like INTERAXIS CALIBRATION helps maintain accuracy by compensating for beam deformation caused by the moving spindle head.
Using PLCTOOL, we quickly developed the machine’s control logic, while SETTOOL allowed us to fine-tune parameters and adjust motion data such as reference points and feed rates. The system also includes a built-in oscilloscope for monitoring feed speed and current waveforms, ensuring accurate position control.
The NUMDRIVE digital servo drive system supports multiple feedback types, including TTL, 1Vpp, and absolute encoders via SSI or EnDat protocols. By adjusting servo parameters, we optimized the PUD position adjuster’s ratio and integration factor. The system also includes low-pass filters and allows switching between half and full closed-loop modes, which is invaluable during debugging.
For the X-axis, which extends over 10 meters, we used a laser to measure full-length errors and adjusted the system parameters to minimize position errors. SETTOOL was used to monitor quiescent currents and make necessary adjustments to achieve optimal performance. With these configurations, the machine met the required acceptance standards without additional position error compensation.
In summary, the NUM1050 and NUMDRIVE combination delivers exceptional performance, ease of use, and precision, making it ideal for complex machining applications.
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