Laser cutting machine
US5491318A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1994 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Jan 7, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50201
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A laser cutting machine which invalidates an alarm generated by a distance sensor during piercing, or invalidates said alarm in a first movement after piercing until a movement is made over a predetermined distance, or invalidates said alarm in a block having no movement, or keeps invalidating said alarm from a piercing start until a movement is made over a predetermined distance after piercing, or invalidates said alarm from a point a predetermined distance before a cutting end point to the cutting end point, or keeps invalidating said alarm from a point a predetermined distance before the cutting end point until a movement is made over a predetermined distance after the arrival at the cutting end point, or invalidates said alarm over a predetermined travel distance in a specified moving command block from the NC program, whereby said laser cutting machine can prevent cutting from being stopped by an unnecessary alarm generated by the alarm signal of the sensor due to scattered or accumulated spatters, the influence of plasma, or inclination of a workpiece or contact with a piece of the workpiece which has blown away at the cutting end point, and cutting can be continued as requir…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.