The reason why the workpiece size in cnc machining differs from the actual size by a few millimetersThe cause of the failure: the speed of the cnc machining center is too fast, the drive and the motor react too much; after the long-term friction loss, the mechanical lead screw and the bearing are too tightly stuck; the tool post is too loose after the tool change, and the lock is not tight; The edited program error, the head and tail did not respond or did not cancel the tool to complete; the system's electronic gear ratio or step angle setting is wrong.Solution: cnc machining center fast positioning speed is too fast, according to the processing material, the GO speed is adjusted appropriately. The cutting acceleration and deceleration time and time make the drive and the motor work normally at the rated operating frequency; the drag occurs after the cnc machining center wears out. If the plate and screw crane bearing are too tightly stuck, they must be re-adjusted and repaired. If the tool post is too loose after the tool change, check whether the tool post reversal time is satisfied. Check whether the worm gear inside the tool post is worn or not. Whether it is too loose; if it is caused by the program, 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 of the manual; if the dimensional deviation is too large, check whether the system parameters are The setting is reasonable, especially if the parameters such as the electronic gear and the step angle are damaged. This phenomenon can be measured by dialing a dial indicator.
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