Nc machine tool are controlled with PLC - related content - Sequence control

As automation control equipment, numerical control machine tool is in the work under automatic control, controlled by CNC machine tool can be divided into two kinds: one kind is finally to the 'digital control' of each axis movement. Such as: the X axis and Z axis CNC lathe, CNC milling machine X axis and Y axis and Z axis movement distance, such as interpolation, compensation of the shaft running control is the 'digital control'. Another kind is 'sequence control'. For nc machine tools, sequence control is in the process of nc machine tool operation, with every stroke of CNC machine tools and internal switches, sensors, button, relay switch state condition of signal, such as logical sequence and in accordance with the prescribed for such as spindle start-stop, reversing, tool change, workpiece clamping, loosen, hydraulic, cooling and lubricating system of operation and control. Compared with 'digital control', 'sequence control the amount of information is mainly switch signal.