Vacuum clamping detection method and vacuum clamping detector
US7263890B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Aug 24, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53178
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When suction/release-passage-internal pressure Pin is equal to or less than a suction detection pressure Pj, a suction of a workpiece is detected and a transfer operation is started. As long as the suction/release-passage-internal pressure Pin does not rise to pressure having an upper limit value or more of the drop detection range during a transfer, it is recognized that the workpiece is not dropped from the sucker. The drop detection range is computed by adding predetermined allowable deflection width ΔD to the suction/release-passage-internal pressure Pin that is read as reference pressure under the condition that the workpiece is sucked by the sucker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.