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4748555 |
Control unit for a moving body
A control unit for a moving body such as an optical system of a copying machine includes detection means for detecting a moving status of the moving body and control means for controlling the...
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4742285 |
Full follow-up type servo-system
In a servo-system of a conventional numerical control (NC) device, a delay in response or deformation is always observed on an output side with respect to an inputted speed command or position...
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4733150 |
Device and method for compensating the gravitational effect on an element, raisable and lowerable by an electric motor, of a machine tool or of a robot
For use with overhead axes of a machine tool or the axes which ride astride one another of a robot, the gravitational effect can be eliminated for controlled drives if a control variable which...
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4724370 |
Servo system for a disk drive
A servo system intermittently samples servo sectors from a data disk to obtain the position of the read/write head and to maintain an on-track alignment. A glass scale measures the movement of the...
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4714988 |
Feedforward feedback control having predictive disturbance compensation
In a method and a system for process control comprising in combination a feed-back control in which a manipulated variable is determined in accordance with a deviation of a controlled variable with...
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4710691 |
Process and apparatus for characterizing and controlling a synchronous motor in microstepper mode
A process for characterizing the motion of a synchronous motor in microstep mode to achieve desired precise velocity motion at the final output. The motor velocity is directly proportional to the...
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4707780 |
Method and apparatus for reducing track errors in computer controlled machine tools or industrial robots
In a computer-controlled machine tool, an auxiliary filter is inserted into the reference value channel of the drive control circuit, which filter has a transfer function approximately the inverse...
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4706000 |
Tool posture control system
A tool posture control system according to the present invention rotates a tool vector v 1 indicative of a present tool position to a target tool vector v 1 through vector rotation, and generates...
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4701686 |
Line tracking control method
A line tracking control method of controlling a robot (51) to cooperate with a conveyor (50) in its movement determines a speed of movement of the conveyor (50) as a constant, determines a...
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4698570 |
Boom positioning apparatus for rock drill
A boom positioning apparatus for a rock drill, including a boom mounted with a drilling apparatus, an input device for determining, as set values expressed in a rectangular coordinate system,...
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4684861 |
Interface unit between a numerical controller and an electric power control circuit
An interface unit is connected beween a numerical controller (NC) and an electric power control circuit (PC). The interface unit includes an actual speed memory (50) into which the numerical...
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4682004 |
Measuring arrangement having a capacitive measuring electrode and a working tool with integrated electrode
In a measuring arrangement for measuring or regulating spacing on thermal working machines (for example, flame cutting installations), two capacitive electrodes are arranged at different spacings...
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4680521 |
Stabilization aid for a vehicle-or vessel-borne search unit
A stabilization aid for a vehicle- or vessel-borne search unit comprises two servomechanisms for stabilizing the observation part (3) of the search unit about two mutually perpendicular axes (S 1 ...
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4670849 |
Position error correcting method and apparatus for industrial robot
A position error correcting method and apparatus suitable for operating an industrial robot with high accuracy, in which, after the industrial robot disposed on a working site is moved according to...
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4658193 |
Sensing arrangement
A sensor arrangement for providing positional information about a component (1) to a robot (11) comprises sensors (4,5) sensing index marks (2,3) on the component. The sensing arrangement derives...
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4651073 |
Positioning control device for an electric motor
A rotational position, velocity and acceleration of an electrical motor are detected and an amount of overrun produced when the motor has stopped is estimated from the detected velocity and...
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4642781 |
System for automatically calibrating a robot
A system for automatically compensating for inaccuracies of a robot in all degrees of freedom. The system includes moving a measuring body held by the robot gripper in response to a command...
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4638221 |
Reaction force compensator
Reaction force compensation means 70 (FIG. 1) for countering the reaction torque of a heavy body, such as rotatable yoke assembly 20, when accelerated relative to flimsily supported body 21 about...
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4638230 |
Bang-bang controlled velocity command generator
In a disc information storage system which employs a servo data disc, a servo data head and a moveable carriage assembly for transporting a plurality of magnetic heads radially across the surface...
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4633423 |
Coherent error suppression in digital tachometers and the like
Synchronous or coherent error appearing as one or more FM sidebands in the high frequency pulse signal of an incremental position encoding digital tachometer or the like and in an error signal...
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4629954 |
Closed loop control method for hydraulic apparatus
A non-linear function f(A) of an effective value D' with respect to a desired value A regarding speed, pressure or the like of an actuator of a hydraulic apparatus in a closed loop control for the...
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4628458 |
Method of detecting lift of tool based upon cumulative machining distance
Life of a tool used in a machining center having various sorts of tools can be detected by steps that a tool selection code at every execution of NC program is detected and the current-use tool...
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4622504 |
Speed correcting device for use in speed command system
In a speed correcting device for use in a speed command system such as a numerical controller or a tracer controller in which a movable machine part is driven at a speed corresponding to a speed...
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4620281 |
In-process cutting tool condition compensation and part inspection
The condition of the cutting tool is monitored during a turning operation and the machine is adjusted to compensate for tool condition. The device is also used as an in-process part inspection...
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4611156 |
Method and apparatus for determining the position or dimensions of a test object
An improved apparatus and process for sensing a test object by means of a switching sensor which is movable relative to the test object, in which the relative position between the test object and...
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4608645 |
Numerical control system for a machine tool with a tool dimension compensation function
A numerical control system is provided wherein numerical controllers associated with machine tools are respectively coupled to auxiliary controllers communicating with a host computer. Each...
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4606489 |
Process and apparatus for controlledly decelerating a mobile tool or workpiece
For the controlled slowdown of a translatory or rotary machine part to arrest same in a predetermined stop position of an entrained load, the part being driven by an electric motor against a...
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H000104 |
Digital resolver compensation technique
The technique compensates the resolver's output digitally by means of a dtal processor and a predetermined resolver error characteristic. The technique uses a digitally compensated resolver which...
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4603284 |
Control system for manipulator apparatus with resolved compliant motion control
A control system for manipulator apparatus having a manipulator arm movable in a plurality of axes utilizes resolved compliant motion control to improve servo response characteristics. The position...
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4595867 |
Steering amplifier
Described herein is a steering amplifier for use in the steering systems of watercraft. Potentiometers are mounted within the helm unit and the feedback unit of the craft and these potentiometers...
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4594670 |
Robot control apparatus
An apparatus for controlling a robot having multi-articulation-type arms with a high accuracy. Work point data and work point instructions for the robot are stored in a main storage section, while...
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4594537 |
Redundant control system for X-wing valve actuators
The capability of compensating automatically for a failure in an actuator and the associated drive circuit is enhanced by providing a dual channel actuator, each channel having a drive coil and a...
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4593237 |
Servo-system having an adjustment indicator
An adjustable servo-system for controlling the operating condition of its servo-motor adjustably includes an indicator unit capable of indicating a new optimum operating time to be used. The...
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4591772 |
Load positioning system with gravity compensation
A load positioning system with gravity compensation has a servo-motor (12), position sensing feedback potentiometer (38) and velocity sensing tachometer (42) in a conventional closed-loop servo...
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4591771 |
Numerical control system
In order to permit manual operation under a condition where the axial direction of a tool and the direction of a hole to be machined in a workpiece are held in agreement, the tool of a radius γ is...
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4590578 |
Off-line programmable robot
Machine operations are performed by a robot at a plurality of locations on a workpiece based on off-line data. The off-line data is corrected based on two levels of workpiece/robot alignment. First...
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4587883 |
High resolution control system for a pressure-responsive positioning device
Two magnetic valves, one of which reduces the pressure and the other one of which increases the pressure by which the displacement of a positioning member is controlled, only one of them operated...
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4587470 |
Multiplex control system
A multiplex control system including a plurality of controllers, the main controller being arranged by hardware, while the subsidiary controller being accomplished by software. Each of the...
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4587469 |
Electric servo system
An electric servo system has an electrical drive and a controllable object driven by the electrical drive whereby an error between an actual amount of actuation of the controllable object and a...
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4583159 |
Numerical controlled machine tool making intermediate measurements
A numerical controlled machine tool apparatus capable of providing intermediate measurement (in process measurement) during the carrying out of a machining process on a workpiece. A spindle of the...
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4583031 |
Device for compensating geometrical defects in the ring of a radial detector of the active magnetic suspension of a rotor
For compensating the geometrical defects of the annular armature of a radial position detector slaving an active radial magnetic bearing, a reference rotor having a small diameter is co-axially...
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4581566 |
System for automatically calibrating a robot
A system for automatically calibrating a robot in all degrees of freedom in one point to compensate for inaccuracies in the different coordinate directions. The system includes moving a measuring...
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4578627 |
Device for correcting the control or the display of the position of a cutting tool of a cutting machine
With cutting machines, having their loading means (7) adapted to be lowered below the running surfaces (11) of the crawlers (2) of the drift advancing machine, there results an erroneous position...
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4578748 |
Positioning control system
A positioning control system wherein variations in the robot coasting distance are substantially eliminated by stopping the command pulse signals simultaneously with a generation of the origin...
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4578763 |
Sampled data servo control system with deadband compensation
The present invention provides a high response inexpensive microprocessor based control system. The system uses only one detector that detects only one motion characteristic of the object...
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4575802 |
Robot/workpiece orientation
A robot "touches off" on the orthagonal touchblock faces of a workpiece holding fixture and the coordinate of the touches along axes nominally normal to the faces provide significant data from...
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4567417 |
Actuator
The invention relates to an actuator and to its application to the position servocontrol for a master-slave remote manipulator. The actuator comprises a box or case in which are housed an electric...
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4563735 |
Process controlling method and system involving separate determination of static and dynamic compensation components
A method and system of process control comprising in combination a feed-back control in which a deviation of a controlled variable with reference to a target value is applied to a velocity type...
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4562392 |
Stylus type touch probe system
A non-cutting tool or stylus (32), mounted in a position where a tool normally resides on a turret (26) of a numerically controlled machining system, rubs against the workpiece (41) as it rotates....
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4556834 |
Numerically controlled pattern cutting machine for glass panes
A system for control of movement of a cross sled which follows movement in an X-Y coordinate system according to a stored program, and for extending or shortening the path of movement either in the...
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