Method of digitizing a profile locus
US4746251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Jan 23, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/30196
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a profiling method constructed so that NC working is performed on the basis of profile locus data obtained by profiling a shape of a model by a profiling machine, a digitized method of the profile locus is characterized in that position data of the model surface, obtained by adding a position of the profiling machine and a displacement signal from a tracer head at each sampling time, are rounded through a low-pass filter upon a profiling operation, and a time constant of the filter is automatically changed in response to the rate of change of the shape of the model. According to this method, fluctuation of the profiling machine, which can not be corrected by the filter heretofore and is an error as it is, is corrected, and a stylus displacement signal, delayed as compared with a response of a profiling machine position signal upon high speed profiling operation, is greatly improved so that high speed profiling operation can be attained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.