Data input-output device for interactive numerical controller

A data input-output device for an interactive numerical controller which enables an operator to input data necessary for numerical control of a machine tool into a memory device in dependence upon an instruction image selectively displayed on a display device in accordance with a numerical control program stored in the memory device, the data input-output device comprising:

• input means having a set of numerical keys arranged to input data used for machining operations of said machine tool into said memory device, a first group of selection keys arranged to correct the input data in accordance with a workpiece to be machined, and a second group of selection keys arranged to change process management data of the machining operations;
• and
• means for disabling data input by manipulation of said second group of selection keys in a condition where said first group of selection keys is being manipulated and for permitting the data input by manipulation of said second group of selection keys when said numerical keys have been manipulated in a particular manner under an inoperative condition of said first group of selection keys.

A data input-output device for an interactive numerical controller which enables an operator to input data necessary for numerical control of a machine tool into a memory device in dependence upon an instruction image selectively displayed on a display device in accordance with a numerical control program stored in the memory device, the data input-output device comprising:

• input means having a set of numerical keys arranged to input data used for machining operations of said machine tool into said memory device, a first group of selection keys arranged to correct the input data in accordance with a workpiece to be machined, a second group of selection keys arranged to change process management data of the machining operations, and a permission switch arranged to be turned on only by using an authorized key;
• and
• means for disabling data input by manipulation of said second group of selection keys in a condition where said first group of selection keys is being manipulated and for permitting the data input by manipulation of said second group of selection keys in a condition where said permission switch is being turned on after said numerical keys have been manipulated in a particular manner under an inoperative condition of said first group of selection keys.