CNC Knowledge: How to deal with the long braking time of CNC lathe spindle?

Spindle startup and braking time is too long or no braking

If the spindle startup time is too long, mainly check the performance of the inverter and whether the parameter settings are reasonable. Focus on checking the starting frequency, starting mode and acceleration and deceleration time settings of the inverter. , and try to adjust them to the best value. If the spindle is not braked, you should first check whether DC braking is selected for the spindle stop mode and whether the braking time setting is reasonable. If the parameters are set correctly but still do not meet the requirements, it may be a hardware failure of the inverter. How to solve the problem:

Problem Details: The spindle inverter was broken, replaced with a new one, then the problem occurred.

Check if the problem is the same as described by the user: first check other functions, replace the tool, the cooling pump and both axes move well. Then check the spindle, start the spindle, it works fine but stops longer than usual.

Diagnosis: If the spindle motor is stopped longer than usual, check the following:

Step 1: Incorrect Inverter Settings

Step 2: The brake system wiring is faulty

Step 3: The spindle belt slides.

It was found that it must be a parameter issue and the inverter needed to be replaced.

Step 1 – Backup the original inverter settings.

Step 2 – Save the wiring before uninstalling the inverter.

Step 3- Replace the inverter as per the records.

Step 4 – It is recommended to format the frequency converter parameters before writing them.

After checking, it was found that the braking time parameter setting was too long, only 10 seconds. After changing it to 3 seconds, the CNC lathe worked normally again.