Emergency help, machining center, when the tool loses its length compensation, its z value in the coordinate system g54 is lost. How to throw it away? If you don't lose in the No.1 cutter, you will get extra points. Generally speaking, the first knife is the coordinate zero, so you don't need to enter the knife length. Don't want to input, you first determine the zero point of z, input it to G54, and run it in the input state (G54; ), the absolute value of the screen is the coordinates of G54. If you check the tool length, the z value displayed by the absolute value of G54 coordinate is the tool length, and you only need to input it into the corresponding tool compensation (remember to cancel the tool compensation if it has been run).