Introduce the input process of CNC lathe processing program

The so-called input of CNC lathe processing program refers to the process of sending the CNC lathe processing program 'written' on the information carrier to the CNC lathe processing program memory of the CNC system through a certain input method. There are two ways of inputting information in the numerical control system: one is manual data input (MDI), which is generally input by keyboard; the other is automatic input, which generally includes photoelectric reader input, disk input, communication interface input or from the upper level computer Communication input with CNC system. The manual input method is generally limited to simple CNC lathe processing program input, and the input of a large number of complex parts processing program should use the automatic input method.
From the inside of the computer numerical control system, the program memory that stores the numerical control program is divided into two parts: one part is the processing program buffer of the numerical control lathe; the other part is the processing program memory of the numerical control lathe. Only one or several program data segments can be stored in the NC lathe processing program buffer, and its scale is relatively small. It is an important part of the input path of the CNC lathe processing program. During processing, the data segment in the buffer It is directly related to the subsequent decoding program. When the NC lathe processing program buffer only accommodates one data segment at a time, the management operation is very simple, but when the scale can store multiple data segments at the same time, a corresponding one must be configured. The buffer management program. The NC lathe processing program memory is used to store the entire NC lathe processing program, and is generally large in scale. When multiple complete CNC lathe processing programs need to be stored in the memory at the same time, in order to facilitate the call or edit operation of the CNC lathe processing program, a directory area is generally opened in the storage area, and the corresponding format is stored in the directory area according to the specified format. Information about CNC lathe processing procedures.
For the input method of photoelectric reader, if it is processing while reading, when the reader is working intermittently, the read program is stored in the buffer, and there is no CNC lathe processing program memory. The early CNC system, especially the hardware This is how the CNC system works. If the part processing program is input once, the reader first reads the program into the buffer, and then sends it to the memory for all storage, and then reads it from the memory section by section into the buffer during processing.
For the input mode of communication between the upper-level computer and the numerical control system, the upper-level computer usually sends a complete program to the NC lathe processing program memory for storage at a time, and then reads it into the buffer section by section during processing. Of course, due to the limitation of the memory capacity of the NC lathe processing program, sometimes a complete program cannot be stored at one time. The solution is to manually divide the program into several complete subprograms in the upper level computer. After processing a subprogram, Then enter the second subroutine until the processing is completed. If the CNC system has the function of dynamic data transmission with the upper level computer, the entire large program can be processed while being transmitted, without being divided into subroutines.
For manual input with the keyboard, the general numerical control system is specially set up with MDI buffer. The program input buffer is stored through the keyboard and used for processing directly, or the CNC lathe processing program can be transferred to the CNC lathe processing program memory for later use.