1. The size of the workpiece differs by a few millimeters from the actual size, or there is a significant change in a certain axis

Causes: The speed of rapid positioning is too fast, and the drive and motor cannot react; After long-term friction and wear, the mechanical drag plate screw and bearing are too tight and stuck; The tool holder is too loose and cannot be locked tightly after changing the tool; The editing program was incorrect, and the end and end did not correspond or the knife repair was not cancelled; The electronic gear ratio or step angle of the system is set incorrectly.

Solutions: If the fast positioning speed is too fast, adjust the speed of GO appropriately, increase or decrease the cutting speed and time to ensure that the driver and motor work normally at the rated operating frequency; If the drag plate and screw crane bearing are too tight and stuck due to machine tool wear, they must be readjusted and repaired; If the tool holder is too loose after changing the tool, check whether the reverse time of the tool holder is met, whether the turbine worm inside the tool holder is worn, whether the gap is too large, and whether the installation is too loose; If it is caused by program reasons, it is necessary to modify the program, improve according to the requirements of the workpiece drawing, select a reasonable processing technology, and write the correct program according to the instructions in the manual; If the size deviation is found to be too large, check whether the system parameters are set reasonably, especially whether the electronic gear and step angle parameters are damaged. This phenomenon can be measured by using a dial indicator.

2. There is a change in the processing of a certain process of the workpiece, while the dimensions of other processes are accurate

Causes: Is the parameters of the program segment reasonable, within the predetermined trajectory, and whether the programming format meets the requirements of the manual

Solutions: If there is tooth disorder and incorrect pitch during the thread program segment, immediately associate it with the peripheral configuration (encoder) of the thread processing and the objective factors of this function.