Application of NUM CNC System on Double-axle Assembly Turning Machine

NUM CNC system has multi-axis group and multi-channel functions. It can control up to 8 axes groups. Each axis group can control up to 9 interpolation axes, 32 servo axes and 4 spindles, and each channel can operate independently. control. We used the NUM1040T to modify the Japanese OKUMA twin-shaft group lathe and achieved satisfactory results. 1 Overview of Machine Tool The left and right sides of Japanese OKUMA two-axis group lathe are relatively independent, and there are independent X, Z axis, spindle, turret type tool holder, cooling system, and automatic protection door. The machine tool lubrication system, hydraulic system, and chip removal system are common. 2 Control Modes for Two Axis Groups The NUM1040T CNC system can control up to two axes groups. Each axis group can control up to four interpolation axes, six servo axes, and two spindles. The control of the dual-axis group is that the system has two relatively independent channels. Each channel has an independent PLC and NC information exchange area, M code, T code, and PLC variables and flags. The system can be switched between the common axis group mode and the independent axis group mode. When the system works in the common axis group mode, the two axis groups have the same working mode. When the system works in the independent axis group mode, the two axis groups have different working modes and can operate independently. By setting the corresponding system parameters and programming the PLC control program, two-axis group control can be realized. 3 Twin-axis group-related system parameter P97—Define the number of axes in the control system. P0—Defines the axis on which the CNC is displayed. P2—Define the CNC measuring axis. P3 - Define servo control and interpolation axes. P5 - Define the machine type of the axis group. P9—Used to associate the axis name with the actual address. P6—Used to configure the spindle with measurement function and specify the spindle type. 4 Twin-axis group-related PLC variable %W2.2—common axis group and independent axis group switching. %W17.B—Axis group selection. Used to display the corresponding axis group data. %Wg03.B—Selection of working mode of independent axis group. (g-1～8 are group numbers, the same below) %Wg00.5—M function response signal of axis group g. %Wg01.2—Cycle start request of independent axis group g. %Wg01.1—Circular stop request for independent axis group g. %Wg02.B—feedrate override for axis group g. %Rg1E.W—Axis group g requires the M function code of the reply. %Rg7C.L—Tool number of axis group g. 5 User Program for Two-axis Group Program Description Multi-axis group machining program is composed of programs corresponding to each axis group. Each program has a common basic sequence number, followed by an index number for the specified axis group. Subroutines in a machining program do not require an index number. For example: %6.1 Program No. of Axis Group 1 % 6.2 Program No. of Axis Group 2 T The function No. of index No. 1 The tool No. TXX in the program can have the same number as that of other tools, and does not need to be the same tool. Tool correction values ​​All programs share the tool correction table. Program variables L0 to L19, L100 to L999, and L900 to L959 can be used for each axis group. Using the multi-axis group function of the NUM CNC system provides the user with a control method for a compound machine tool, enabling a compound machine tool to have the functions of multiple single machine tools.