| 摘要 |
PROBLEM TO BE SOLVED: To improve estimating accuracy of a spindle position increment value by providing a means storing a spindle position command calculated from a stored spindle position command increment value, means storing a spindle position calculated from a stored spindle position increment value, and a means determining an estimated value of the spindle position increment value. SOLUTION: An arithmetic device in a command forming device is provided with a means which arithmetically stores a spindle position command rs (i+M-1), rs (i+M-2),..., rs (i-K-Nn ) from a spindle position command increment value Δrs stored in a memory. From a spindle position increment value Δys stored in the memory, a means is provided, which stores a spindle position ys (i-K), ys (i-K-1),..., ys (i-K-Na ). Further, from the stored spindle position command rs and the spindle position ys , a means is provided, which determines as a formula an estimated value of the spindle position increment value Δys (i+m), m=D, D+1, ...D+M. |
