TOOL TRAJECTORY DISPLAY DEVICE HAVING FUNCTION FOR DISPLAYING INVERSION POSITION OF SERVO AXIS

• US 20140100688A1
• Filed: 10/09/2013
• Published: 04/10/2014
• Est. Priority Date: 10/10/2012
• Status: Active Grant

• Current Assignee: Fanuc Corporation
• Original Assignee: Fanuc Corporation
• Inventors: TEZUKA, Junichi, OGAWA, Hajime
• Granted Patent: US 9,423,785 B2
• Time in Patent Office: Days
• US Class Current: 700/186
• CPC Class Codes: G05B 19/404 characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia G05B19/19, G05B19/41 take precedence
• CPC Class Codes: G05B 19/409 characterised by using manual data input [MDI] or by using control panel, e.g. controlling functions with the panel; characterised by control panel details or by setting parameters G05B19/408, G05B19/4093 take precedence
• CPC Class Codes: G05B 2219/36171 Edit velocity, motion profile, graphic plot of speed as function of time, position

Abstract

A tool trajectory display device capable of displaying an inversion position of a servo axis on a tool trajectory. The display device has a position information obtaining part and velocity information obtaining part which obtain position information and velocity information of at least one servo axis, respectively, from numerical controller; a tool coordinate calculating part which calculates a coordinate value of a tool center point based on the position information and information of a mechanical constitution of the machine tool; an inversion position calculating part which calculates an inversion position where a polarity of a velocity of the servo axis is changed, based on the velocity information and the calculated coordinate value; and a displaying part which displays a trajectory of the tool center point based on the calculated coordinate, and displays the inversion position of the servo axis on the trajectory.

Claims

1. A tool trajectory display device for displaying a trajectory of a tool center point of a machine tool with a plurality of servo axes including at least one rotation axis controlled by a numerical controller, the tool trajectory display device comprising:

a position information obtaining part which obtains position information of at least one of the servo axes;

a velocity information obtaining part which obtains velocity information of the servo axis;

a tool coordinate calculating part which calculates a coordinate value of the tool center point based on the position information of the servo axis and information of a mechanical constitution of the machine tool;

an inversion position calculating part which calculates an inversion position where a polarity of a velocity of at least one servo axis is changed, based on the velocity information of the servo axis and the coordinate value of the tool center point; and

a displaying part which displays a trajectory of the tool center point based on the coordinate value of the tool center point, and displays the inversion position of the servo axis on the trajectory of the tool center point.

2. The tool trajectory display device as set forth in claim 1, wherein the displaying part simultaneously displays the inversion positions of the plurality of servo axes on the trajectory of the tool center point.

3. The tool trajectory display device as set forth in claim 1, wherein the displaying part displays an inversion position where the polarity of the velocity of the servo axis is changed from plus to minus and an inversion position where the polarity of the velocity of the servo axis is changed from minus to plus, by using marks with different shapes.

4. The tool trajectory display device as set forth in claim 1, wherein the displaying part changes a display attribute of the trajectory of the tool center point based on the polarity of the velocity of the servo axis.

5. The tool trajectory display device as set forth in claim 1, wherein the displaying part displays an arrow, a sign or a character which represents the inversion position.