| 摘要 |
PURPOSE:To make a preceded variable limitable to a fixed quantity so accurately, by compensating slippage between delivery timing and execution timing of machining information. CONSTITUTION:A copying data processing part 25 performs linear approximation operation of point sequence data by sampling on the basis of a central position of a stylus 11, and finds the newest block while limiting length of a long shaft of one block to less than the specified value. This machining information block is delivered to a separate numerical control system 28 as machining information 27. At this time, an auxiliary code is added to all blocks. At the copying side where these block data are delivered, a preceded variable to be used for override control required for synchronized operation is calculated as watching a preceding auxiliary code execution finishing signal to be fed back from the machining side. That is to say, final calculation for the preceding slippage is made so as to do synchronously with a one block completion signal 35 at a copying speed control part 14. With this constitution, an adverse effect due to buffering of block data stored in the separate numerical control system comes to nothing.
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