In the process of using the machining center, the parameters should be strictly controlled within the range of its use, otherwise, may damage the machine, such as: CNC machining center, CNC milling machine on the table fixture workpiece can not exceed the maximum load bearing unit auxiliary agent, or will lead to damage in the track movement; Cutting force to avoid overload, otherwise will cause damage to the transmission mechanism, failure, due to more serious current too large spindle motor burned or feed shaft motor.