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Application of NUM1050 CNC System in Three-axis Gantry Milling Machine
The NUM1050 is an open, powerful CNC system that uses a 64-bit CPU for fast processing and high position control accuracy. The system can perform both simple RS232C serial communication and complex FIPWAY network communication. System parameter settings and transmission, loading and unloading machine tool parts program are very convenient. The electrical control of a three-axis gantry milling machine using NUM1050 and NUMDRIVE is briefly described below. 1 machine tool electrical control system components The machine has 3 linear coordinates, X coordinate drive gantry, the stroke of up to 10.5m, 3 coordinates using HEIDEHAIN linear encoder (1Vpp sine wave) full closed-loop feedback, the machine tool spindle is electric spindle. For the structural characteristics of the machine, the NUMI050 CNC system, NUMDRIVE digital servo drive system, and MDLU digital feed drive module are configured for its electrical control system. In consideration of the DNC control of the machine tool and the function of the FMS incoming line, the inserting type is configured. FIPWAY network communication module; BPH motors (X: 36N"m, 200r/min, Y: 17N·m, 200r/min, Z: 17N·m, 200r/min) are installed on the three feed coordinates. Schneider Inverter 2 NUM1050 CNC peripheral interface module NUM1050 The machine operator panel has as many as 39 custom keys.The panel and the system are optically connected.We combine some of the characteristics of the machine control operation and define some on the operation panel. The operation keys completely satisfy the requirements of the machine control.The NUM1050 provides users with a variety of input output modules, among which 32 input modules, each with an LED indication, can receive three lines in addition to the normal 24VDC switch. The proximity sensor signal, which provides a convenient and reliable connection to some of the three-wire proximity switches of the machine, the 24-bit output relay module, the maximum output current up to 8A It fully meets the control requirements for the solenoid valve and the contactor in the electrical system of the machine tool.The NUM1050 itself has an analog input and output and an external interrupt interface (IT/ANA), which provides a flexible analog output port for the machine tool, facilitating other modules This machine tool uses this interface and outputs it as the command voltage of the spindle inverter, and successfully realizes the stepless speed control of the numerical control system to the frequency conversion electric spindle.3 The software development tool of the NUM1050 numerical control system is the machine tool manufacturing of the NUM1050 numerical control system. Providers have provided abundant software resources and powerful software development tools such as PLCTOOL, SETTOOL, MMITOOL, PCKITTOOL, etc. They are all built on the WINDOWS platform, which brings great convenience to the electric control system development personnel of the machine tool. A variety of position compensation software is provided for users, among which the INTERAXIS CALIBRATION is a feature that is a position compensation software designed for gantry milling machines.The weight of the spindle is due to the movement of the spindle on the gantry. Causes the longitudinal deformation of the beam, which is nonlinear in the direction of the mainshaft movement Through this software, the system can perform position compensation in real-time on the Z-axis according to the amount of movement of the spindle head on the crossbeam, so that the machine tool achieves good position control accuracy.We have used PLCTOOL software to develop the machine tool in a short time. The PLC controls the program and uses SETTOOL to quickly and accurately set and adjust the machine parameters and servo drive parameters, and adjust the machine-related motion data (reference point, soft limit, machine maximum feedrate, etc.). The interferometer is used to measure the 3-coordinate positioning error, and the position correction of the parameters is performed using the "axes correction" software provided by the system. NUMDRIVE digital servo drive system uses parameters to configure the feedback elements of the machine. The system is compatible with various position measurement feedback systems, such as TTL type, 1Vpp type, absolute position coding, serial SSI protocol absolute position coding and serial EnDat protocol absolute position coding. A series of position measurement feedback elements. Through the modification of the servo parameters, the ratio and integration factor of the PUD position adjuster can be optimally adjusted. The digital servo drive system also has a low-pass filter function for special applications. Modifying the parameters of the system can easily switch the machine half closed loop and full closed loop. This function is especially useful for debugging machine tools. The machine uses a 1Vpp type linear encoder, does not require EXEC: signal conversion unit, only set the parameters V0350 simple, you can achieve system and measurement system matching. When debugging the Z-axis coordinate of the machine tool, observe the current through SETTOOL, adjust the Z-direction motor's up-down current in a timely manner, and adjust the Z-direction servo parameters V051 and V052 so that the Z-axis coordinate operation is stable and accurate. The system can detect the quality of the feedback position signal of the grating rule in real time, and the signal will alarm in time when it fails. The use of SETTOOL built-in oscilloscope to observe the coordinate feed speed and current waveform, accurately determine the quality of the system position adjustment, the three-coordinate servo speed proportional gain and speed integral gain was adjusted. The length of the scale is adjusted by the laser to measure the full-length error of the coordinates. Use SETTOOL to observe the quiescent currents of the 3 coordinates, and timely adjust the system parameters and the mechanical system to make the 3 quiescent current minimum. More than 10m of X-direction feeding cancels the position error compensation, only using the servo system's own position adjustment, it reaches the machine tool acceptance accuracy requirement. In short, NUMDRIVE digital servo drive system is very convenient and efficient for adjusting the static and dynamic accuracy of the position of the machine tool.