US Patent No. 9,557,729

TOOL TRAJECTORY DISPLAY DEVICE INCLUDING DISPLAY UNIT FOR TRAJECTORY DATA


Patent No. 9,557,729
Issue Date January 31, 2017
Title Tool Trajectory Display Device Including Display Unit For Trajectory Data
Inventorship Hajime Ogawa, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 9,557,729

1. A tool trajectory display device comprising:
a numerical control device that controls at least one drive shaft of a machine tool based on an instruction position in a
machining program;

an actual position data acquisition unit that acquires an actual position of the at least one drive shaft controlled by the
numerical control device;

a start point coordinate storing unit that stores a plurality of coordinate positions of the at least one drive shaft as start
point coordinate positions upon initiation of executing a plurality of repetition portions included in the machining program
for repeatedly machining identical shapes or symmetric shapes;

a movement amount determining unit that determines a movement amount of the at least one drive shaft from a first start point
coordinate position to a second start point coordinate position among the plurality of start point coordinate positions stored
in the start point coordinate storing unit;

a trajectory calculation unit that calculates a first actual trajectory of a tool tip point of the machine tool from the actual
position acquired by the actual position data acquisition unit based on the first start point coordinate position after adding
the movement amount and a repetition portion corresponding to the first start point coordinate position, and that calculates
a second actual trajectory of the tool tip point from the actual position based on the second start point coordinate position
and a repetition portion corresponding to the second start point coordinate position; and

a display unit that superimposes and displays the first actual trajectory and the second actual trajectory calculated by the
trajectory calculation unit.