tamizhxpress

Did you solve this problem ?

I face same issue in our machine. Please let me know the solution

Hello,

It means when spindle motor speed is reduced, DC bus voltage increases as spindle motor energy is fed into DC bus.

What type of Infeed module & spindle motor you have?

Is it new machine under commissioning or old running machine?

Have you changed any hardware recently or modified any parameter? 

What is application i.e. chuck (rotation of job) or cutting tool?

 @tamizhxpress

he told you he replaced the infeed module (Power supply ), problem solved.

You did not say module information, but I guess you have Siemens E/R module--Infeed and regeneration module , normally 16 KW or 36KW or 55KW and so on.

when the module regeneration function failed you will have trouble when big motor reduce speed (normally spindle ).

If you want detail, you need post module information

tamizhxpress

Did you solve this problem ?

I face same issue in our machine. Please let me know the solution