The reason of irregular spiral pitch in CNC lathe machining in Shandong
From:Taian Haishu Machinery Co.,Ltd. Updatetime:2018-4-17 17:56:46 Views：
When machining the thread in Shandong CNC lathe, the pitch of the thread at the beginning of the thread is irregular, and so-called turbulence occurs.
The reason of irregular spiral pitch in CNC lathe machining in Shandong
When machining the thread in Shandong CNC lathe, the pitch of the thread at the beginning of the thread is irregular, and so-called turbulence occurs.
Analyze and solve: The thread is machined on the CNC lathe, and the actual X-axis rotation angle is interpolated with the Z-axis feed. The turbulence is caused by the fact that the X-axis feed cannot be synchronized with the Z-axis, and the machine servo system itself causes hysteresis. GSK980T is an economical CNC system. The spindle speed is open-loop control. Under different loads, the spindle start-up time is different. At the start, the spindle speed is unstable, and the rotation speed will also have a corresponding change. The start of thread cutting is to detect the position on the spindle. The encoder starts after a turn signal and therefore may cause the X axis and Z axis feed to fail to synchronize. The above problems can be solved by modifying the program.
1. Change the positioning point of the thread machining program to make it far away from the workpiece. In this way, the unstable spindle speed changes are completed in the space. After the stability is reached, the tool actually touches the workpiece and starts the thread processing.
2. Add the G04 pause command before the spindle rotation command M03, thread processing command to ensure that the spindle speed is stable and then start the thread processing.
