The Logical Design of a Third Generation Numerical Control System |
Common terms and phrases
absolute data input acceleration logic analog BCD numbers Bidirectional binary-coded decimal Boolean expressions borrow output chips circuitry clock input command number command point command register command signal control section controlled mechanism count count-down mode count-up mode data input section decade of subtraction decade subtraction decode digital-to-analog conversion discrete diodes end-of-block signal error counter error signal output exclusive-nor gate fan-in FF's fifteen's complement half subtractor hundred's complement in-position incremental feedback incremental pulse incremental system input signals integrated circuit J-K flip-flops logic gates machine tool table machine zero minuend minus mono-shot nand gates numerical control system operation order Includes machines position number position register position signals printed circuit cards proper decades punched tape rapid-traverse speed reset row counter sequencing logic serial sequencing counter servo-drive shown in Figure significant decade silicon-controlled rectifi slow-down logic slow-down point Subtract six subtractor outputs subtrahend switch tape reader ten's complement truth table voltage