Time series data display device converting point sequence data to time series data regarding drive axes to be displayed

Patent metadata

Field	Value
Publication number	US-2016109873-A1
Application number	US-201514876863-A
Country	US
Kind code	A1
Filing date	Oct 7, 2015
Priority date	Oct 16, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

A time series data display device calculates position data in time-series of a movement point on drive axes based on the position feedback data, generates a command movement trajectory of the machine end based on the position command data, generates an actual movement trajectory of the machine end based on the actual position data, calculates position data of the machine end which are intersection points between straight lines, which are perpendicular to the command movement trajectory and pass through the movement point, and the actual movement trajectory, converts the position data of the machine end to position data with respect to drive axes, and displays the position feedback data in time-series and the position data in time-series.

First claim

1 . A time series data display device, comprising:
a position feedback data acquisition unit which acquires position feedback data, which are position feedback data of drive axes driven by servo motors and obtained by first measuring instruments, with a predetermined sampling period; a command data acquisition unit which acquires position command data to a machine end, which moves driven by the drive axes, from a numerical control device; a position data acquisition unit which acquires actual position data of the machine end, which are obtained by a second measuring instrument, with a predetermined sampling period; a drive axis position calculation unit which, based on the position feedback data acquired by the position feedback data acquisition unit, calculates position data in time-series of a movement point on the drive axes; a command trajectory generation unit which, based on the position command data in time-series to the machine end acquired by the command data acquisition unit, generates a command movement trajectory of the machine end; an actual trajectory generation unit which, based on the actual position data in time-series of the machine end acquired by the position data acquisition unit, generates an actual movement trajectory of the machine end; a machine end position calculation unit which calculates position data of the machine end which are intersection points between straight lines, which are perpendicular to the command movement trajectory generated by the command trajectory generation unit and pass through the movement point expressed by the position data calculated by the drive axis position calculation unit, and the actual movement trajectory generated by the actual trajectory generation unit; a position data conversion unit which converts the position data of the machine end calculated by the machine end position calculation unit to position data with respect to the drive axes; and a display unit which displays the position feedback data in time-series acquired by the position feedback data acquisition unit and the position data in time-series converted by the position data conversion unit in the same display style as each other.

2 . The time series data display device according to claim 1 ,
wherein the display unit, in addition to the position feedback data and the position data, displays the position command data in time-series acquired by the command data acquisition unit at the same time.

3 . The time series data display device according to claim 1 ,
wherein the command data acquisition unit acquires position command data to the drive axes from the numerical control device and, based on the position command data to the drive axes and machine configuration information, acquires the position command data to the machine end.

4 . The time series data display device according to claim 1 ,
wherein the actual trajectory generation unit generates the actual movement trajectory by interpolating values between actual position data in time-series of the machine end with straight lines.

5 . The time series data display device according to claim 1 ,
wherein the actual trajectory generation unit generates the actual movement trajectory by interpolating values between actual position data in time-series of the machine end with polynomials.

Assignees

• Fanuc Corp

Inventors

• Ogawa Hajime
• Tezuka Junichi

Classifications

• G05B19/4062

  Monitoring servoloop, e.g. overload of servomotor, loss of feedback or reference · CPC title

• G05B19/402 Primary

  characterised by control arrangements for positioning, e.g. centring a tool relative to a hole in the workpiece, additional detection means to correct position (G05B19/19 takes precedence) · CPC title

• G05B19/18

  Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form (G05B19/418 takes precedence) · CPC title

• G05B2219/33336

  first dsp calculates commands for each motor, second dsp regulates position · CPC title

• G05B2219/39219

  Trajectory tracking · CPC title