Method for controlling feeding motion of numerical controlled machine and numerically controlled machine

摘要

In a handle feeding control method in a numerical control apparatus in which a control axis can be controlled in response to a pulse signal output from a manual pulse generator for generating the pulse signal according to the turning quantity of a manual handle so as to perform handle feeding, at least one of a movement quantity, a target position and a movement range of the control axis is set and stored; and the movement quantity or position of the control axis at the time of the handle feeding is monitored, and pulse signals from the manual pulse generator thereafter when the movement quantity or position of the control axis at the time of the handle feeding reaches the limit of the set and stored movement quantity, target position or movement range are, invalidated so that the movement quantity or position of the control axis at the time of the handle feeding is prevented from exceeding the set and stored movement quantity, target position or movement range. Furthermore, the number of pulses per interpolation period of a pulse signal output from the manual pulse generator is n-divided per interpolation period (wherein n represents an integer of 2 or larger), the division number of pulses is distributed and output to the interpolation period at the time of inputting of the pulse signal and its following (n-1) interpolation periods, and then, the handle feeding is endowed with speed increasing/decreasing characteristics.