Numerical control device
US-9851709-B2 · Dec 26, 2017 · US
Numerical controller performing speed control that suppresses excessive positioning deviation
US2016246284A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016246284-A1 |
| Application number | US-201615019023-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 9, 2016 |
| Priority date | Feb 19, 2015 |
| Publication date | Aug 25, 2016 |
| Grant date | — |
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Abstract
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A numerical controller sets a parameter actually used for servo control on the basis of command data generated by analyzing a machining program. Based on the set parameter and a predefined allowable position deviation amount, a feed speed which is given by a position deviation not exceeding the predefined allowable position deviation amount is calculated. Then, when a feed speed commanded by the command data is larger than the calculated feed speed, the feed speed commanded by the command data is clamped at the calculated feed speed.
First claim
Opening claim text (preview).
What is claimed is: 1 . A numerical controller which controls a machine on the basis of a machining program, the numerical controller comprising: a program analysis unit that analyzes the machining program to generate command data; a parameter setting unit that sets a parameter actually used for servo control on the basis of the command data; and a speed control unit that obtains a feed speed which is given by a position deviation not exceeding a predefined allowable position deviation amount, on the basis of the set parameter and a predefined allowable position deviation amount, and when a feed speed commanded by the command data is larger than the obtained feed speed, clamps the feed speed commanded by the command data at the obtained feed speed. 2 . The numerical controller according to claim 1 , wherein the parameter contains at least a position gain of a servo and a feedforward coefficient. 3 . The numerical controller according to claim 1 , wherein the speed control unit obtains the feed speed which is given by a position deviation not exceeding the predefined allowable position deviation amount, as a maximum speed which satisfies the expression: V≦ERR ×PG/(1−α) where V is the feed speed which is given by a position deviation not exceeding the predefined allowable position deviation amount, ERR is the allowable position deviation amount, PG is a position gain of a servo, and α is a feedforward coefficient.
Assignees
Inventors
Classifications
- G05B19/404Primary
characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia (G05B19/19, G05B19/41 take precedence) · CPC title
Correction of position error · CPC title
Interpolation general · CPC title
- G05B19/4103Primary
Digital interpolation · CPC title
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- What does patent US2016246284A1 cover?
- A numerical controller sets a parameter actually used for servo control on the basis of command data generated by analyzing a machining program. Based on the set parameter and a predefined allowable position deviation amount, a feed speed which is given by a position deviation not exceeding the predefined allowable position deviation amount is calculated. Then, when a feed speed commanded by th…
- Who is the assignee on this patent?
- Fanuc Corp
- What technology area does this patent fall under?
- Primary CPC classification G05B19/404. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Aug 25 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).