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US 10,649,434 B2Granted
Numerical controller
AssigneeFanuc Corporation
InventorKousuke Uno
Life of this patent
Estimating the term…
Abstract
A numerical controller can suppress overshoot in adaptive control and includes a speed calculation unit and a spindle load correction unit. The speed calculation unit performs PID control to adjust a feeding speed based on a spindle load measured by a measurement unit. The spindle load correction unit corrects the spindle load so as to have a value close to a target load until the spindle load reaches the target load. The speed calculation unit performs PID control using the corrected spindle load.
Claims3
A numerical controller comprising:
- a spindle load measurement unit that measures a spindle load;
- a speed calculation unit that performs PID control to adjust a feeding speed based on the spindle load;
- and
- a spindle load correction unit that calculates a value based on a ratio between the spindle load and a cutting volume as a feedback value,
- wherein the speed calculation unit is configured to perform the PID control using the feedback value.
2 more elements
A numerical controller comprising:
- a spindle load measurement unit that measures a spindle load;
- a speed calculation unit that performs PID control to adjust a feeding speed based on the spindle load;
- and
- a spindle load correction unit that corrects the spindle load so as to have a value close to a target load until the spindle load reaches the target load,
- wherein the speed calculation unit is configured to perform the PID control using the corrected spindle load, and wherein
- the spindle load correction unit is configured to correct the spindle load based on a ratio between a length of a chord of an arc, which indicates a contact surface between a tool and a workpiece, and a diameter of the tool.
3 more elements
Dependencies are inferred from the claim text.