| 摘要 |
PURPOSE:To make highly accurate working control simultaneous linear interpolation control is performed by controlling a working arm of two or more shafts, such as electric discharge machine, etc., by comparing the present position with an ideal line and, when any difference occurs between them, moving the present position to the ideal line by inserting a correction pulse for returning the working arm to the ideal line. CONSTITUTION:Under the numerical control of a CPU1, digital signals for controlling feed motors 6 and 6' are outputted from a distribution calculating unit 3 and revolving speeds of the motors 6 and 6' are detected by feedback detecting units 7 and 7' and fed back to motor driving circuits 5 and 5'. When advance working is performed by repeating the setting and updating of numerical control data through an interpolation correcting process, the interpolation correcting process compares new data with ideal data before writing the new data to the distribution calculating unit 3. When any difference occurs, the present point is approached to the ideal data by causing the unit 3 to distribute the difference as correcting data. Therefore, the working arm of an electrospark machining machine can always be kept on a fixed interpolation line by repeating the above-mentioned operations. |
