| 摘要 |
<p>PURPOSE:To enable the method to simultaneously perform a suitable control and abnormality detection, by gathering a value of cutting load electric current in every very short specific time and determining the control value from a mean value in every relatively short specific cutting time and from a mean value of fellow low values obtained in the continuous preceding two times and following two times. CONSTITUTION:The method determines the maximum value, obtained in every mean program in every 0.2sec of an actual cutting load electric current A in every 0.01sec during monitoring cutting, as a control value A0 for a suitable control. Next, the method, comparing the value with a value Ai in every 0.2sec by actual cutting and changing a cutting speed or a feed speed 10% by 10%, controls cutting. The maximum value B0, obtained in every mean program of low values in the continuous preceding two times and following two times of said actual cutting load electric current in every 0.01sec, is increased to 1.5 times, setting a threshold level to be determined, and if a gathered value Bi during actual cutting exceeds the threshold level, the method stops operation by an alarm signal. Accordingly, the cutting can be controlled by the method preventing the suitable control from becoming sensitive while a current noise from mixing in an abnormality detection value.</p> |
