HELP -- Strange Problem in AD-7260S

When i connect AD-7260S -ZR in DVD Duplicator (ACARD or ILY), it works well for 2 or 3 days after that the spindle motor is not working. The same problem happens in DRU-880S also.

There was no problem if AD-7240S/AD-5240S used.

Let me know the reason for this?

Clearly, they are not built for duplicators.