Program operation processing and fault detection of economical CNC lathe
With the development of the machine tool industry, more and more economical CNC lathes are applied to all walks of life. The following is a brief introduction to the reader's knowledge of the operation, processing and fault detection of economical CNC lathes.
Operation of economical CNC lathe program
Economical CNC lathes use digital information for automatic control. The economical CNC lathe is off-position when the program runs and the tool returns to the origin. This phenomenon is generally caused by the running resistance of the mechanical transmission system. When the cutting feed is in progress, the tool holder runs at a low speed, and the low voltage is driven. The stepping motor has a small running torque, which is insufficient to overcome the resistance and cause lost steps. When returning to zero, the stepping motor is driven by high voltage, the running speed is high, the torque is large, and there is no force resistance. The stepping motor runs normally without losing steps. This will cause the above phenomenon when you go back and lose when you go back. At this time, it can be checked whether there is any iron filings on the transmission gear between the stepping motor gearbox or the stepping motor and the lead screw, or whether the slide plate is too tight to increase the running resistance.
It inputs the machining program into the numerical control device through the control medium. After the numerical control device is analyzed and processed, it sends various signals and commands corresponding to the machining program to control the machine tool for automatic machining.
About the handling of economical CNC lathes
Economical CNC lathes have been developed on the basis of ordinary lathes, but their automation has been greatly improved. Its automatic control system is mainly composed of a single-chip microcomputer. Through the control program, the vertical and horizontal feed device and the tool change device of the machine tool are controlled to automatically complete the processing of the parts. When the program runs, the tool returns to zero, which is generally caused by a control system failure. The tool requires low speed operation during feeding or machining. At this time, the stepping motor runs at a low speed and is powered by a low voltage power supply. When the program returns to zero, it needs to be quickly retracted. At this time, the stepping motor is required to run at a high speed, and the high voltage driving power source is used. , so that the output torque is increased to ensure normal zero return. A switch triode that controls the output of the high-voltage drive power supply. When the switch triode is damaged, the high-voltage power supply cannot be turned on when the high-speed return to the zero point, and the output torque of the stepping motor is not enough, causing the return to zero, causing the tool to return to the original point. The faulty replacement switch triode can be eliminated. If you encounter such a problem, you can exclude and handle it yourself.
Fault detection of economical CNC lathe
The economical CNC lathe tool holder is not easy to malfunction; the electric tool holder has common failures: the tool holder can not find the desired tool position during the tool change process, the tool position cannot be locked, and the positioning accuracy is in error.
The simple CNC lathe is a more complex machine-electrical integration device, so it should be comprehensively analyzed from the mechanical structure and electrical control of the machine tool in case of failure. The stepping motor runs normally at low speed, and the stepping motor loses step at high speed. This phenomenon may be caused by a decrease in the driving power supply voltage and a decrease in the output torque of the stepping motor. Therefore, it is important to check the drive power section. When the high voltage starting transistor is damaged, the high voltage power supply cannot be turned on, which reduces the output torque of the stepping motor at high speed, resulting in lost steps. It may also be caused by a mechanical failure.
Therefore, in the case of checking the above-mentioned components, check the screw, the nut, the slide, the stepper motor reducer, etc., and when the parts are bent, deformed, or have foreign objects stuck, the running resistance will increase. When running at low speed, the phenomenon is not obvious, but when running at high speed, it can not completely overcome the running resistance and cause lost steps.