In the use of CNC lathes, the automatic rotary tool post often fails, and many people don't know how to solve it. Now the editor will introduce to you the failure of the rotary tool post and the elimination measures.

Fault 1: The tool post of the CNC lathe does not rotate (generally the system will prompt that the signal of the rack position is wrong). There are various reasons that can cause the tool post to not rotate.

Reason analysis: 1. The tool post relay is disconnected after overload. The phase error of the turret motor 380V. Since the tool post can only rotate clockwise (there is a directional positioning mechanism inside the tool post), if the three-phase connection is wrong, the tool post motor will reverse immediately after powering on, and the tool post cannot rotate. 2. Three-phase phase loss of the tool post motor. The 24V power supply for the position signal of the tool post fails, and the thrust ball bearing 7 on the central axis 2 of the tool post is crushed by the axial positioning disk. The bearing cannot rotate, so that the tool holder motor cannot drive the tool holder to rotate. 3. The control system "system location board" is faulty. After the tool post is in place, the "system positioning board" should be able to detect the tool post position signal.

Elimination measures: check the high current circuit of the machine tool, disassemble the tool post, adjust the thrust ball bearing to the gap, replace the damaged parts, check the 24V power supply, and replace the "system positioning board".

Fault 2: The tool post of the CNC lathe is indexed, but the lock is not tight or not in place. The tool post will sway from side to side when you pull it by hand.

Reason analysis: the reverse circuit of the tool post motor is faulty, and the motor does not reverse, because when the tool rotates, the motor should be reversed immediately, and the tool post body should be put down and locked in the positioning groove of the tool post base. If the motor does not reverse, the above actions cannot be completed and the tool post will loosen. When the knife holder rotates, the initial position of the screw used to lift the knife holder is wrong, so the recovery position is also wrong.

Troubleshooting measures: check the motor reverse control circuit, disassemble the tool holder body, adjust the notch of the bolt rod boss and the initial position of the target.

Fault 3: The tool post of the CNC lathe is shifted, but the tool post has rotated multiple tool positions and cannot be fixed on any tool position.

Cause analysis: The Hall element that detects the position of the tool post is faulty. The CPU board or position signal board of the control system is faulty.

Elimination measures: check the static and dynamic parameters of the Hall element, if the parameters are abnormal, replace the parts. Replace the CPU board and locate the multiplier board.