Statistics of China's Fully Automatic CNC Machine in 2019 found that China's machine tool industry scale is lower than Japan, accounting for about 31.5% of the global proportion, mainly in East China. With the modular development of Fully Automatic CNC Machine, CNC machining equipment has increased the characteristics of flexibility. The control system can logically process programs with control codes or other symbolic instructions, decode them, represent them with coded numbers, and input them into numerical control devices through information carriers. So you know what? Most of its faults are caused by software errors, and after determining that the software is trouble-free, it can save a lot of trouble and improve maintenance efficiency without dismantling the mechanical part of the machine tool.
1. When cutting, the machining surface has ripples. It indicates that the spindle is loose and poor lubrication caused by bearing wear. Adjust the front and back nuts of the spindle, and adjust the radial runout and axial movement values of the spindle within 0.01.
2, the machine does not work according to the program, the size of the pulse step phenomenon, resulting in reset, inaccurate positioning, machining workpiece unqualified. The reasons are: the connection between the tool holder and the slide board is loose, the connection between the guide rail and the slide board is loose, and the connection between the guide rail and the slide board is loose; The wear gap between the guide rail and the slide plate increases, and the gap between the connecting key of the lead screw and the driven gear in the reduction gear box is large. The guide rail must be scraped and the connection key of the driven gear must be replaced. (If the gap is not too large, it can be solved by adjusting the host control gap compensation data)
3. The long-term operation of the machine tool, the screw wear is not uniform, some parts are too loose, some parts are too tight, resulting in stuck or vibration. Replacing the worn screw or the ball screw nut pair is conducive to improving the positioning accuracy of the machine tool and prolonging the service life of the stepper motor.
4. Poor positioning accuracy during processing. First check whether the damper in the back cover of the stepper motor is too loose, and then find whether the connection between the stepper motor and the screw is loose, or whether the screw has axial movement.
5. The machine feed is not running smoothly, the size deviation is too large and the phenomenon of losing step after reversing. Check whether the taper pin at the joint of the stepper motor and the driving gear is loose or broken.
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