No need. XY: Generally, machine programmers have set the coordinates, which will only be changed when doing special work. XY is also divided into the XY coordinate value of the machine itself and the XY coordinate value of the current workpiece. Under normal circumstances, XY doesn't need to set the knife. You can check with the programmer who set the coordinates whether to set the knife every time. After all, the workflow of each factory is different, and the knives used in the tool magazine don't need to be aligned again, because the last batch of work has been aligned. If you don't hit Xin 'an's knife on the bed, you must aim it, because the relative compensation value of each knife is different. If the current knife needs to be re-centered, because the new knife is worn, it will definitely be bad if it is just pressed. Grasp the accuracy according to the requirements of residence. The compensation in the Z direction is similar to what the above brother said. To put it bluntly, it is the distance from the flange (the plate with the knife) to the tip. If you open a rough knife, it is φ 65438+. Because the milling cutter is thick, its length must be longer than φ 2 or φ 3. In other words, each tool must have different compensation, otherwise each tool will work with the compensated tool distance, so the work will be wasted. Haha, friendly reminder: the exposure time of Xin 'an tool must be longer than the machining depth, otherwise the nozzle of the tool will hit the workpiece. Fanuc is the milling machine of Frank System.