What is the reason for the abnormal noise of the ball screw of the CNC milling machine and the abnor

Ball squeak is generally worn. If it is newly assembled. It may be that the assembly is too tight or the slag is in.

But you didn't make it clear. Balls are said to be ball bearings? Or a ball nut?

The front says "when the X-axis screw is going in the right direction", and the back says "the screw does not turn". If the lead screw does not turn, then the nut should not turn either. It is impossible to make abnormal noises.

That's the problem with the ball bearings. The lead screw does not rotate, but the realistic coordinates of the system are constantly changing. It can only mean that there is a problem with the coupling.

Because of the semi-closed-loop system. The system coordinates only detect the motor. When the motor turns, the coordinates move.

It doesn't matter if the machine is moving or not. If the coupling is not tightened, it may be rubbed and there will be abnormal noise. It's not necessarily a bearing problem.

The landlord's method of selection is very good, using the contrast elimination method, but I think the work you have done is not perfect. According to you, I think there are 2 problems:

1. Your lead screw is worn, and the accuracy becomes low, resulting in high resistance, which in turn causes the motor to be overloaded.

Without machining (i.e., without external load), if there is an abnormal sound in the forward and reverse directions, and the reverse is normal, it means that there is a problem with your lead screw.

2. The torque of the motor is not enough.

The landlord can check the information of the motor, some motors can be controlled within a high speed, but there is no way to control it at a low speed. Basically, the torque of the motor is high at low speed, and low torque at high speed, so it is necessary to consider the problem of speed and torque.

Test method: The motor and the new motor are used in different positions, and the comparison of "A: the new motor and the lead screw" and "B:

The old motor and the new lead screw "are compared with the same load and dry operation, so that it is easy to rule out the cause. If it's not clear, it can be discussed.

Generally, it is the abnormal sound of the bearing, and the sliding guide rail generally has no sound.

Check the thrust bearing on the screw, which is the most prone to wear.

The life of the ball screw pair is relatively long, so it is unlikely to be an abnormal sound from the ball screw pair.

If there is no problem with the thrust bearing, check the ball screw pair.

1.Lead screw-related bearing problems.

2.If there is a problem with the lead screw nut on the lead screw, it is recommended that the landlord remove the motor and manually rotate the lead screw, is it smooth???

If the motor runs normally after being removed, the installation is shaken, and after a long time, your motor will burn out.

It is possible that there is a problem with the servo motor.

Hello, the reason is (1) the dynamic balance of the spindle parts is not good.

2) The gear meshing gap is uneven or severely damaged.

3) The bearing is damaged or the transmission shaft is bent.

4) Poor gear accuracy.

5) Poor lubrication.

Troubleshooting:

1) The dynamic balance of the spindle components is not good, and the dynamic balance is redone.

2) The gear meshing clearance is uneven or seriously damaged, the clearance is adjusted or the gear is replaced, 3) the bearing is damaged or the transmission shaft is bent, repair or replace the bearing, straighten the transmission shaft, the reason is (1) the dynamic balance of the spindle components is not good, (2) the cavity return gear meshing clearance is not uniform, or seriously damaged, (3) the bearing is damaged or the transmission shaft is bent (4) the gear accuracy is poor, (5) the lubrication is poor troubleshooting methods: (1) the dynamic balance of the spindle components is not good, and the dynamic balance is redone (2) the gear meshing clearance is uneven or seriously damaged Adjust clearance or replace gears (3) Bearing damage or bending of the transmission shaft Repair or replace the gear round bearing, straighten the transmission shaft (4) Poor gear accuracy Replace the gear (5) Poor lubrication Adjust the amount of lubricating oil to maintain the cleanliness of the headstock.

First, fix the connecting gear of the end milling head at the place of the horizontal milling spindle and tighten the tie rod. The ruined feast quietly made it firmly fixed on the horizontal mill. Then use a forklift to plug in the end mill head, and then slowly approach the column to make the connecting disc contact with the guide rail, and slightly tighten the clamping block of the guide rail so that it is not easy to fall off.

Then install the dowel pins and finally tighten the screws. The steps of disassembling the slag of the end milling head: 1. Lift the end mill head first.

Stress it on the ominous bridge.