Apparatus and method for measuring small increases in machine tool drive motor power
US6526359B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1999 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Dec 10, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50203
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for measuring the electrical load on a motor driven tool operating in a cycle having idle and cutting or machining states. The electrical power is continuously measured and an average power value is established during the idle state of at least one cycle and used as an offset subtracted from the measured electrical power values to generate an output proportional to the incremental power drawn by the cutting tool during the cutting state. The offset value is recalculated at the start of each new cycle and/or just prior to the commencement of a cutting operation by a tool. At least one filter and/or an amplifier are used to improve the signal-to-noise ratio of the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.