Generally, the control system of CNC machine tool can control the machine tool according to the digital program instruction to realize the automatic start stop, reversing and speed change of the spindle. It can automatically control the feed speed, direction and processing route for processing. It can select the tool and adjust the cutting amount and travel track according to the size of the tool. It can complete all kinds of auxiliary actions needed in the processing. When we use machine tools to process parts, we usually need to control the various actions of the machine tool, one is to control the sequence of actions, the other is to control the displacement of each moving part of the machine tool. When machining with ordinary machine tools, such operations as start-up, stop, feed, change direction, change speed of spindle and switch cutting fluid are all controlled by manual. When automatic machine tool and copying machine tool are used for machining, the above operation and motion parameters are controlled in the form of analog quantity through the designed cam, profiling and blocking device. Although they can process more complex parts, and have certain flexibility and versatility, the machining accuracy of parts is affected by the manufacturing accuracy of cams and profiling machines, and the preparation time of working procedure is also very long 。
When machining parts with large CNC machine tools, it is only necessary to compile program codes in the form of digital information, such as part graphics, process parameters and processing steps, and input them into the control system of machine tools, and then convert them into the command signals of driving servo mechanism after calculation and processing, so as to control the coordinated action of various parts of the machine tool and automatically process the parts. When the processing object is changed, it is only necessary to re write the program code and input it to the machine tool, and then the NC device can replace most of the functions of human brain and hands, control the whole process of processing, and produce any complex parts.
After a speed command is given in MDI mode, the spindle does not move a little bit. At first, it is suspected that the shift signal is incorrect. When the z-axis gearbox is disassembled, it is found that the shift of the spindle gear is normal and in place signal is correct. But the spindle doesn’t rotate. In principle, if the spindle encoder or the spindle is not powered on, it will cause an alarm. Therefore, I have ruled out the above two doubts. Do you want to know what good solutions are available for such problems?
The solution can refer to 1: first of all, we should know whether we can see the parameters after 9000, and if we can see them, whether the parameters are needed. I have encountered such a situation, it is 0i-MC system, all axes are normal, that is, the main shaft does not rotate. Later, we changed the parameters after 9000. I don’t know if 21i is like this
The solution can be referred to 2: there was an oi-m in the company before, and it was found that it was caused by the clamping of the pneumatic valve of the tool arm. After the tool change, the tool arm should be ready for the next knife, but the knife arm did not put down, and there was no alarm. After the valve was replaced, it was ready. And whether there is a hydraulic fixture, the fixture is not tightened, or the clamping signal is disconnected.
Solution can refer to 3: first look at the spindle monitoring, turn the spindle by hand to see if there is a value? Is the value correct? In the past, there is no alarm and the spindle does not rotate. No monitoring value. Adjust the distance. Or replace it with a new one.
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