I have a CNC lathe Dalian Jingao 6 140. When chamfering, there are random lines, no cutter lines, one line after another. X phase is handled separately, and Z phase is fine. ...

Constant speed limit rotation G96 is harmful to the motor. Can you see that the cutting speed of the machine tool is faster under the condition of two-axis linkage? If so, there may be a problem with the machine parameters. You can also see if the knife is worn, or grind an arc chamfer at the tip of the knife, or simply chamfer it with a 45-degree knife, I hope it will help you. . . .