The control system of the CNC pipe thread lathe has a very high degree of intelligence and generally has a fault self diagnosis function. In general, there is an alarm message when a fault occurs. According to the troubleshooting methods in the manual, most faults can be found and resolved. Here are some common methods for handling and analyzing non alarm faults in CNC pipe thread lathes:

1、 In CNC equipment, the most common occurrence of no alarms is due to machine tool errors or inaccurate dimensions

The phenomenon of the CNC pipe threading lathe appearing larger and smaller in the diameter direction is more common. The reason for this type of failure is generally due to the different frequency and likelihood of failure caused by the coupling structure between the screw and the motor, and the different phenomena after the failure occurs. Some sizes only increase in the negative direction, but there is a possibility of positive and negative direction changes. According to experience, for couplings that use elastic connections in the middle, the negative direction increases more, while for couplings that use key connections in the middle, both types of failures will occur.

2、 During the process of turning threads on a CNC pipe thread lathe, the threads are randomly threaded

At first, I thought it was a problem with the system software. After deleting the original software and reinstalling the system, the system malfunction still persists. After analysis, it may be a mechanical failure. Upon opening the box cover, it was found that the mechanical connection between the spindle and the spindle encoder was loose. After recalibration and fixing, the fault was eliminated.

3、 In the use of CNC pipe thread lathe, manual movement is normal, automatic return to zero movement for a certain distance but does not move, and manual movement is normal again when restarted

The CNC pipe thread lathe uses economical CNC and stepper motor. When manually moving, due to slightly slower speed, it automatically returns to zero, and the fast moving distance is longer, resulting in mechanical jamming. Based on the analysis of the malfunction, it is mainly due to mechanical reasons. This kind of malfunction often occurs without proper attention during repair, so it should be taken seriously in work to avoid its occurrence.