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

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.