Nc machine tools in the X, Y, Z axis is out of control?

Nc machine tools in the X, Y, Z axis is out of control? 2020 - 12 - 09 nc machine tools is now widely used in the single varieties of large quantities of parts processing, due to the strong stability, high precision, high efficiency, has replaced the original ordinary machine tools. At the same time, CNC milling machine, CNC lathe into product large-scale configuration automation production line, realized the automation into management. But in production due to the servo system of nc machine tool malfunction, causes in the process of machining, CNC milling machine X, Y, Z axes fast moving at the same time; Y axis CNC lathe feed suddenly out of control, etc. Below we give fault phenomena, analysis, inspection, and troubleshooting. A, CNC milling machine processing suddenly appeared in the process of X, y, Z axes fast exercise 1 at the same time. Fault phenomenon. CNC vertical milling machine, FANUC - 7 cm CNC milling machine, in the process of machining, sudden X, Y, Z axes fast moving at the same time, lead to machine tool collision, cause the damage of the cutting tool and the workpiece. 2. Failure analysis. Is the usual cause of axis suddenly out of control caused by open loop of position loop. When a shaft above problems, who is due to the servo system of general industry measurement system failure. But on the machine, because all the axis machine tool problems at the same time, therefore the cause of the problem should be related to the system of public section. Considering the entire position encoder of the machine tool is the unification of the power supply module power supply, if the power supply module of + 5 v is bad, will lead to a system of three axis position loop fault at the same time. 3. Failure to check. Carefully measuring machine tool power module and compared with the similar machine, the machine of + 5 v power when idle, the voltage is normal. Study group of 806540922 nc counterparts. 4. Failure analysis. Measured, found after connecting the load, the power supply module when the output current for 4 a, the output voltage to 4. 25 v; Output current is 10 (a. Rated output) When the output voltage to 2 v. But in normal machine tool, the output current of 10 (a. Rated output) , still keep the 5 v output voltage, thus confirm the fault related to the power supply module. 5. The breakdown maintenance. Directly replace the power module, machine back to normal. 6. Breakdown maintenance record registration. Ready to machine breakdown maintenance record registration on the implementation of the mission. Second, the numerical control lathe 1 Y axis feed out of control. Fault phenomenon. Feed is out of control, numerical control lathe in Y axis feed point move or program, guide once moved, can't stop, until we press the emergency stop. 2. Failure analysis. According to the basic principles of position control of CNC system, the fault can be determined file on the X axis position loop, and is likely to be the position feedback signal loss. So, once the nc device feeding instructions given position, feedback actual position is always zero, position error can't eliminate all the time, lead to machine tool feed out of control. Remove the position measuring unit pulse encoder for inspection, found that the encoder filament has broken, causing no feedback input signal. 3. The processing results. After change the y axis coder, troubleshooting. 4. Breakdown maintenance record registration. Ready to machine breakdown maintenance record registration on the implementation of the mission. （ Source: web)