Numerical control including zero offset and pulse counting digital comparison

Claim 2

In a control system for positioning a controllable member: an input signal system for producing discrete electrical signals indicative of a desired position of said member in accordance with a predetermined signal program, and including at least one correction signal indicating a correction in said discrete electrical signals of said input signal system is to be made; an incremental position transducer system controlled by said member for producing discrete electrical signals indicative of displacement of said member; electrical means coupled to said input signal system and said transducer system for producing an electrical output when the signals of each system are different; electrically controlled drive means responsive to said electrical output and coupled to said member for positioning said member; an adjustable discrete signal device for producing discrete position offset signals indicative of a correction to be made in the discrete signals of said input signal system; and means forming a part of said input signal system for combining the discrete signals of said adjustable device with the discrete signals of said input signal system in response to said correction signal.

Claim 3

In a control system for positioning a controllable member: an input signal system for producing respective groups of electrical signals, a correction signal and a sign signal indicating that an addition to or subtraction from the input signal is to be made; an incremental position transducer system controlled by said member for producing electrical signals in accordance with increments of displacement of said member; adjustable electrical means producing adjustable groups of electrical signals respectively indicative of a correction to be made to individual groups of said electrical signals of said input signal system; means controlled by said correction signal for combining an adjustable group of electrical signals with a group of electrical signals of said input signal system in the sense indicated by said sign signal; electrical comparator means coupled to said input signal system and said transducer system for producing an electrical output when the signals of each system are different; and electrically controlled drive means for said member coupled to said comparator means for receiving said output signal and controlling said member.

Claim 4

In a control system for positioning a controllable member: an input signal system for producing respective groups of electrical signals, a correction signal and a sign signal indicating that an addition to or subtraction from the input signal is to be made; an incremental position transducer system controlled by said member for producing electrical signals in accordance with increments of displacement of said member; adjustable electrical means producing adjustable groups of electrical signals respectively indicative of a correction to be made to individual groups of said electrical signals of said input signal system; means controlled by said correction signal for combining an adjustable group of electrical signals with a group of electrical signals of said input signal system in the sense indicated by said sign signal; electrical comparator means coupled to said input signal system and said transducer system for producing an electrical output when the signals of each system are different; and electrically controlled drive means for said member coupled to said comparator means for receiving said output signal and controlling said member.

Claim 5

A numerically controlled machine tool system for controlling a machine tool member comprising: input signal circuits for producing respective discRete input signal groups which are differently weighted; an adjustable signal device for producing respective groups of discrete signals which are differently weighted; a circulating register having an output circuit; signal converting and combining circuits including said circulating register, coupled to said input signal circuits and to said adjustable signal device for converting said respective signal groups into serial signal trains and for algebraically combining serial signals from correspondingly weighted signal groups; an incremental position transducer system coupled to and controlled by said member for producing discrete electrical signals in response to displacement of said member; a circulating register synchronized with said first circulating register and coupled to said incremental position transducer to receive signals therefrom and having an output circuit; movement control circuits coupled to the output circuits of both of said circulating registers; and drive means coupled to said movement control circuits and controlled thereby and coupled to said member to move said member.

Claim 6

A numerically controlled machine tool system for controlling a machine tool member comprising: input signal circuits for producing respective discRete input signal groups which are differently weighted; an adjustable signal device for producing respective groups of discrete signals which are differently weighted; a circulating register having an output circuit; signal converting and combining circuits including said circulating register, coupled to said input signal circuits and to said adjustable signal device for converting said respective signal groups into serial signal trains and for algebraically combining serial signals from correspondingly weighted signal groups; an incremental position transducer system coupled to and controlled by said member for producing discrete electrical signals in response to displacement of said member; a circulating register synchronized with said first circulating register and coupled to said incremental position transducer to receive signals therefrom and having an output circuit; movement control circuits coupled to the output circuits of both of said circulating registers; and drive means coupled to said movement control circuits and controlled thereby and coupled to said member to move said member.

Claim 7

A numerically controlled machine tool system for controlling a machine tool member comprising: input signal circuits for producing respective discrete input signal groups which are differently weighted and a sign signal indicating that an addition or subtraction is to be made to at least one of the input signal groups; an adjustable signal device for producing respective discrete correction signal groups which are differently weighted; a circulating register having an output circuit; signal converting and combining circuits, including said circulating register, coupled to said input signal circuits and to said adjustable signal device for converting said respective signal groups into serial signal trains and for algebraically combining serial signals from correspondingly weighted signal groups in response to and in the sense indicated by said sign signal; an incremental position transducer system coupled to and controlled by said member for producing discrete electrical signals in response to displacement of said member; a circulating register synchronized with said first circulating register and coupled to said incremental position transducer system to receive signals therefrom and having an output circuit; movement control circuits coupled to the output circuits of both of said circulating registers; and drive means coupled to said movement control circuits and controlled thereby and coupled to said member to move said member.

Claim 8

A numerically controlled machine tool system for controlling a machine tool member comprising: input signal circuits for producing respective discrete input signal groups which are differently weighted and a sign signal indicating that an addition or subtraction is to be made to at least one of the input signal groups; an adjustable signal device for producing respective discrete correction signal groups which are differently weighted; a circulating register having an output circuit; signal converting and combining circuits, including said circulating register, coupled to said input signal circuits and to said adjustable signal device for converting said respective signal groups into serial signal trains and for algebraically combining serial signals from correspondingly weighted signal groups in response to and in the sense indicated by said sign signal; an incremental position transducer system coupled to and controlled by said member for producing discrete electrical signals in response to displacement of said member; a circulating register synchronized with said first circulating register and coupled to said incremental position transducer system to receive signals therefrom and having an output circuit; movement control circuits coupled to the output circuits of both of said circulating registers; and drive means coupled to said movement control circuits and controlled thereby and coupled to said member to move said member.

Claim 9

In a control system for positioning a controllable member: means for producing discrete electrical signals indicative of a desired position of said member; an incremental position transducer system coupled to and controlled by said member for producing discrete electrical signals in response to movement of said member; circulating register means for receiving and circulating said first-mentioned electrical signals and said second-mentioned electrical signals; circuit means coupled to said circulating register means for receiving said first-mentioned and said second-mentioned electrical signals and for producing an electrical output when said first-mentioned electrical signals and said second-mentioned electrical signals are different from one another; and means coupled to said circuit means and controlled by said electrical output and coupled to said member for controlling movement of said member.

Claim 10

In a control system for positioning a controllable member: means for producing discrete electrical signals indicative of a desired position of said member; an incremental position transducer system coupled to and controlled by said member for producing discrete electrical signals in response to movement of said member; circulating register means for receiving and circulating said first-mentioned electrical signals and said second-mentioned electrical signals; circuit means coupled to said circulating register means for receiving said first-mentioned and said second-mentioned electrical signals and for producing an electrical output when said first-mentioned electrical signals and said second-mentioned electrical signals are different from one another; and means coupled to said circuit means and controlled by said electrical output and coupled to said member for controlling movement of said member.

Claim 11

In a control system for positioning a controlable member: input means for producing discrete electrical signals indicative of a desired position of said member; incremental position transducer means coupled to and controlled by said member for producing discrete electrical signals in response to movement of said member; a storage device coupled to said incremental position transducer means for receiving electrical signals therefrOm; delay line storage means; means coupling said input means and said storage device to said delay line storage means for applying electrical signals to said delay line storage means; arithmetic circuits coupled to said delay line storage means for receiving electrical signals therefrom and for performing arithmetic operations on received electrical signals; and means coupled to said arithmetic circuits and controlled thereby and coupled to said member for controlling movement of said member.

Claim 12

In a control system for positioning a controlable member: input means for producing discrete electrical signals indicative of a desired position of said member; incremental position transducer means coupled to and controlled by said member for producing discrete electrical signals in response to movement of said member; a storage device coupled to said incremental position transducer means for receiving electrical signals therefrOm; delay line storage means; means coupling said input means and said storage device to said delay line storage means for applying electrical signals to said delay line storage means; arithmetic circuits coupled to said delay line storage means for receiving electrical signals therefrom and for performing arithmetic operations on received electrical signals; and means coupled to said arithmetic circuits and controlled thereby and coupled to said member for controlling movement of said member.

Claim 13

In a control system for positioning a controllable member; input means for producing discrete electrical signals indicative of a desired position of said member; incremental position transducer means coupled to and controlled by said member for producing discrete electrical signals in response to movement of said member; a storage device coupled to said incremental position transducer means for receiving electrical signals therefrom; delay line storage means; circuitry coupling said input means and said storage device to said delay line storage means to apply electrical signals to said delay line storage means; timing circuits coupled to said circuitry for controlling the timing of the application of electrical signals to said delay line storage means; arithmetic circuits coupled to said delay line storage means for receiving electrical signals therefrom and for performing arithmetic operations on received electrical signals; and means coupled to said arithmetic circuits and controlled thereby and coupled to said member for controlling movement of said member.

Claim 14

In a control system for positioning a controllable member; input means for producing discrete electrical signals indicative of a desired position of said member; incremental position transducer means coupled to and controlled by said member for producing discrete electrical signals in response to movement of said member; a storage device coupled to said incremental position transducer means for receiving electrical signals therefrom; delay line storage means; circuitry coupling said input means and said storage device to said delay line storage means to apply electrical signals to said delay line storage means; timing circuits coupled to said circuitry for controlling the timing of the application of electrical signals to said delay line storage means; arithmetic circuits coupled to said delay line storage means for receiving electrical signals therefrom and for performing arithmetic operations on received electrical signals; and means coupled to said arithmetic circuits and controlled thereby and coupled to said member for controlling movement of said member.