US 5,313,403 AGranted

Numerical control apparatus having a circular interpolation locus display function and control method thereof

AssigneeToshiba Kikai Kabushiki Kaisha

InventorsJun Fujita, Teturo Kurokawa, Sadaji Hayama

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Abstract

A method for displaying a circular interpolation locus which is used in a numerical control apparatus. The method is constituted by the steps of detecting movements of axes controlled by the numerical control apparatus, synthesizing signals detected in the detected step, displaying a movement locus of two axes as a circular interpolation locus on a display. A numerical control apparatus which has a circular interpolation locus display function is also disclosed. The numerical control apparatus is constituted by first detecting unit for detecting a motion of a control object controlled by a first servo motor, second servo detecting unit for detecting a motion of the control object by a second servo motor, two axes synthesizing unit for synthesizing the output signals for the first detecting unit for displaying the two axes movement locus. The method and apparatus can be applicable both semi-closed loop and hybrid control.

Claims17

Dependent claims

A method for displaying a circular interpolation locus of a numerical control apparatus, comprising the steps of:

obtaining a commanded circular interpolation locus in a form suitable for display;
detecting movements of two axes that are controlled by said numerical control apparatus responsive to said commanded circular interpolation locus and generating detected signals related to said movements;
synthesizing signals from said detected signals generated in said detecting step into a form suitable for display;
and
displaying said commanded circular interpolation locus on a display and displaying the movement locus of said two axes as a circular interpolation locus on the display, superimposed on said displayed commanded circular interpolation locus, using signals synthesized in said synthesized step to thereby simultaneously display a command circle and a measured circle,
wherein said displaying step includes the steps of:
calculating a difference between values of said commanded circular interpolation locus, and values of said measured circular interpolation locus;
exaggerating an amount of said difference, and
displaying said command circle and said measured circle in their entirety while displaying an exaggerated difference between an actual value from a command circuit and said circular interpolation locus which emphasizes the difference therebetween on the same display.

6 more elements

A numerical control apparatus having a circular interpolation locus display function, comprising:

means for obtaining a commanded circular interpolation locus in a form suitable for display;
first detecting means for detecting a motion of a control object by a first servo motor which control a first axis and for outputting a first detected signal indicative thereof;
second detecting means for detecting a motion of the control object by a second servo motor which controls a second axis and for outputting a second detected signal indicative thereof;
two axis synthesizing means receiving said first detected signal and said second detected signal, for synthesizing the outputs into a form suitable for display;
and
display means for displaying the displayed commanded circular interpolation locus superimposed with the two axis movement locus from an output signal of the two axis synthesizing means to obtain optimum servo characteristics for the first and second servo motors, said synthesizing means including:
means for calculating a difference between values of said commanded circular interpolation locus, and values of said measured circular interpolation locus;
and
means for displaying said commanded circular interpolation locus and said measured circular interpolation locus in their entirety while exaggerating an amount of said difference, and displaying an exaggerated difference between an actual value from a command circuit and said circular interpolation locus which emphasizes the difference therebetween on the same display.

6 more elements

Dependencies are inferred from the claim text.