G04 nc意思

"G04 NC" is a programming command used in CNC (Computer Numerical Control) programming. The "G04" part is a code that indicates a dwell or a pause in the program, while "NC" stands for "Numerical Control."

Here's what the command means and how it's used:

• G04: This code is used to specify a dwell or a pause in the CNC program. During a dwell, the machine will stop all motion at the current position for a specified duration. This can be useful for various reasons, such as allowing the machine to settle after rapid movement, or to ensure that a tool is in the correct position for the next operation.

• NC: This is a general term that refers to the technology of numerical control. In the context of CNC machining, "NC" is often used interchangeably with "CNC." However, the term "NC" is more generic and was used before the advent of computers in machine tools, while "CNC" specifically refers to computer-controlled machines.

An example of how "G04 NC" might be used in a CNC program is as follows:

G00 X100.0 Y50.0 Z20.0; Rapid to start position
G01 X90.0 Y40.0 F100.0; Linear interpolation to a position at a feed rate of 100mm/min
G04 P1000; Pause for 1 second
G01 X80.0 Y30.0 F200.0; Linear interpolation to a new position at a feed rate of 200mm/min
G04 P2000; Pause for 2 seconds
G00 X10.0 Y10.0 Z10.0; Rapid to the home position
M30; End of program

In this example, after each movement command (G01), there is a dwell command (G04 Pxxxx) that specifies a pause for a certain period (measured in milliseconds). The "P" parameter followed by a number indicates the duration of the pause. The number is typically specified in milliseconds (thousandths of a second), but the exact meaning of the parameter depends on the machine's control system.

It's important to note that the specific meaning and usage of the "G04" command, including the format of the pause duration parameter, can vary between different CNC machine models and control systems. Always refer to the documentation or manual for your specific CNC machine to determine the correct usage of this command.