1.       Test the machine without workpieces or tools. Make sure that the machine runs well before it starts to work.

2.    Check the input data of the system carefully before operating the machine. Incorrect input data may cause the machine to work improperly, so as to damage the workpiece and the tool, as well injure the operator.   

3.    Make sure that the input feedrate of the system is suitable for the expected operation. Feedrate has a maximum for each machine, and the amount of the feed rate is subject to change with operation. Choose the maximum according to the instructions of the machine. Improper feedrate leads the machine to work wrongly, so as to damage the workpiece and the tool, as well injure the operator.                                                                                                                                                            

4.    When tool compensation is needed, check the direction and the amount of the compensation. Improper compensation causes the machine to work wrongly, so as to damage the workpiece and the tool, as well injure the operator.

5.    If the machine is to run in Manual Mode, check the current position of the tool and the workpiece, and correctly specify the moving axis, moving direction and the feedrate. Handwheel control with great override, such as 100, may damage the machine and its tool, even injure the operator.

6.    If the tool is return to the reference point, make sure that the machine has been equipped with the device to detect the reference point, otherwise, the tool can not reach the reference point, which may damage the machine and its tool, and even injure the operator.