摘要:
In a numerically controlled machine tool a feed control apparatus is provided which includes a gauging means for controlling the movement of a movable component, such as a wheel head or a work table, of the machine tool. Control means are coupled to a numerical control means of the numerically controlled machine tool and to the gauging means. The control means will enable a shifting of the numerical control means from a numerical control mode to a jog mode for allowing a miscellaneous function to be performed and from a jog mode to a numerical control mode after a sizing signal is generated by the gauging means whereby the tool is first moved in a coarse numerical mode to a preset position, then the workpiece is gauged while the system is in the jog mode, and finally switched back to a fine numerical control for final machining with a resultant saving in the amount of numerical information required.