The measurement accuracy of CNC machining depends on the accuracy of the detection components and the accuracy of the machine tool feed chain. The machining accuracy of closed-loop CNC machine tools largely depends on the accuracy of position detection devices, and CNC machine tools have very strict requirements for position detection components, with resolutions typically between 0.001 and 0.01mm or less.
Compared with CNC equipment, the probability of detecting component failures is still relatively high, and phenomena such as cable damage, component scaling, collision deformation, etc. can often be seen. If you suspect the fault of the detection component, you should first check for cable breakage, dirt, deformation, etc. You can also judge the quality of the detection component by measuring its output. This requires you to be proficient in the working principle and output signal of the detection component. For example, what should be done when the mechanical oscillation (acceleration and deceleration) of the detection device malfunctions
1) The pulse encoder has malfunctioned. At this point, check if the voltage of the feedback line terminal on the speed unit drops at a certain point. If there is a decrease, it indicates that the pulse encoder is not working properly and should be replaced.
2) The pulse encoder cross coupling may be damaged, causing the shaft speed to be out of sync with the detection speed. The coupling should be replaced
(4) Reasonable use of hardware accessory processing equipment
Large rough machining allowance and cutting amount can be used for machine tools with high power, good stiffness, high efficiency, and low accuracy. Low precision cutting force and minimal damage to the machine tool, using high-precision machine tools. This fully utilizes the respective characteristics of the equipment, which can improve production efficiency and extend the range of use of precision equipment.
