Profiling control apparatus and control method thereof
US4719578A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1985 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Dec 9, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23Q35/123
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved profiling control apparatus controls a profiling machine so that the apparatus judges whether an exact profiling operation is performed by the machine at a place where a surface shape of the model to be profiled is suddenly changed, for example at a step, without jumping of a stylus from the model surface, and the profiling machine performs the exact profiling operation without jumping of the stylus. The profiling control apparatus, which detects a displacement of the stylus pressed on the model surface from a tracer head and controls the profiling machine in accordance with the displacement detection signal, includes a displacement compounding unit for compounding three dimensional displacement signal .epsilon.x, .epsilon.y and .epsilon.z to produce a displacement signal .epsilon.(=.sqroot..epsilon.x.sup.2 +.epsilon.y.sup.2 +.epsilon.z.sup.2), a displacement differentiating unit for differentiating the displacement signal to produce a differentiated value d.sup.2 .epsilon./dt.sup.2, a comparison voltage producing unit for producing a comparison voltage Vc corresponding to a maximum acceleration .beta.max of the pressed stylus which can be produced thereon, and a compar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.