First of all, from the hardware analysis, the rigidity of the machine tool is not enough, the power of the 3-axis driving motor is not enough, the power of the spindle is not enough, the tool extends too long, the workpiece is not firmly clamped, and the hardness of the workpiece is too high. . . . etc

From the perspective of process planning, the path direction is wrong (the root is easy to produce tool marks), the path spacing is too large, the tool selection is improper, the tool is worn, and the rough machining is over-cut. . . .

There are so many influencing factors that I can't think of them at the moment. It depends on the specific knife method to judge.