US Patent No. 10,338,563

NUMERICAL CONTROL DEVICE


Patent No. 10,338,563
Issue Date July 02, 2019
Title Numerical Control Device
Inventorship Junichi Tezuka, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 10,338,563

1. A numerical control device that controls a machine tool having a drive mechanism causing a tool to move in a plurality of axial directions, the numerical control device comprising:a command position calculation unit that calculates command position information based on a machining program;
a command path calculation unit that calculates command path information, based on the command position information calculated by the command position calculation unit;
an estimated actual position calculation unit that calculates estimated actual position information, based on the command position information and transmission characteristic information of the drive mechanism;
an estimated actual path calculation unit that calculates estimated actual path information based on the estimated actual position information calculated by the estimated actual position calculation unit;
a path error calculation unit that calculates path error, based on the command path information calculated by the command path calculation unit and the estimated actual path information calculated by the estimated actual path calculation unit;
a machining time calculation unit that calculates a machining time based on the estimated actual path information;
a jerk calculation unit that calculates jerk in each axis based on the estimated actual position information;
an evaluation value calculation unit that calculates an evaluation value, based on the path error calculated by the path error calculation unit, the machining time calculated by the machining time calculation unit, and the jerk calculated by the jerk calculation unit; and
a parameter correction instruction unit that instructs correction of various parameters including the transmission characteristic information based on the evaluation value.