For CNC machine tools v1370, the learning of CNC programming is a process from theory to practice. The so-called apply what you have learned, you will hate less when you learn. Many students will find it easy and solid to learn the theory, but will feel at a loss when it comes to practical operation. In fact, what I lack in this process is experience. The book is always shallow, and practice is the only criterion for testing truth. Below I will give you a rough classification of some of the details you pay attention to in the operation of the machine, so that you can know it well, so that you will not panic when you operate the machine.
One, switch machine
Machine tools have strong and weak currents. The machine tool control power supply is strong current, and the CNC system power supply is weak current. In order to prevent the strong current from impacting the weak current, we must give priority to the weak current being turned on at the earliest and turning off at the latest. So the steps to switch the machine are as follows:
Boot steps
Turn on the main power supply and turn on the power switch of the machine tool;
Turn on the power of the CNC system;
Turn on the control power after the screen display is stable; (that is, the hydraulic pump starts to work)
Shutdown steps
After the machine tool returns to zero, press the emergency stop switch, the control power is turned off, and the hydraulic pump stops;
Turn off the power of the CNC system panel, the screen disappears;
Turn off the power supply of the electric cabinet;
2. Preparation
After the power-on is completed, we must first check whether the machine tool has alarm information, if it is running normally, open the program MDI interface and enter the single-segment program G91G28X0Y0Z0. This is for each axis to return to the reference point, in order to prevent the machine position error. Of course, you can also manually return to zero on the operation panel.
Secondly, we need to check the tools, arrange the tools according to the technological requirements, load the required tools into the tool magazine, and record the corresponding tool number of each tool. After the workpiece is clamped, the tool setting operation can be started.
In the process of manual tool setting, we will encounter accidental overtravel, and we have to cancel the alarm. When an alarm occurs, the screen will display an alarm page to inform X or Y of overtravel. We need to press the RESET key to cancel the alarm, and then move the overtravel axis to the stroke position in the opposite direction.
Three, programming
This process is the most familiar to us in the process of theoretical study, so I won't repeat it here.
4. Anti-collision knife, check the correctness of the procedure
This point is the most critical and most important in the hands-on operation. Knife bumping is the most taboo for beginners. It will not only leave a psychological shadow on the learner, but also may face compensation for damage to the machine tool. So we must be careful and careful.
We must standardize the operation and strictly follow the "three look, two important, one stop" processing guidelines, which can greatly reduce the collision problem in the operation of the machine tool.
Three look:
Look at the program, find out the problems in the program by checking the program statement and program name, and correct it in time. Use the form of computer software simulation to detect whether there is an error in the specific program statement. If there is a problem with the upper and lower logic of the statement, the simulation software will automatically point out the problem, so that the programmer can modify the program in time until the operating program does not exist. problem.
Second, look at the coordinates of the workpiece. When inspecting the machine tool, you should focus on the position of the tool tip. After a period of use, the tool tip will wear out. After adjusting the tool, check the actual position and the data displayed on the screen.
Two important:
First, single-segment execution is required. The advantage of single-segment execution is to give operators sufficient inspection time, including tool inspection, coordinate inspection, and program inspection, thereby greatly avoiding collisions.
Second, low magnification. Reduce the feed rate of the tool by adjusting the speed adjustment knob of the CNC machine tool. You can observe whether the tool tip position is consistent with the coordinate display value before the tool is processing the workpiece. If the two values are not equal, you can turn it off in time. Stop the equipment to avoid collision problems.
One stop:
Through the pause, the operator can have enough mental preparation to observe and compare the position of the tool tip and the coordinate display on the screen, especially when the chips are wound on the workpiece or the tool, they can press the cycle stop key, and use this time to solve the CNC machine tool Problems in processing can prevent errors caused by panic during operation.
