Control apparatus of machine tool including feed shaft motor and main spindle motor
US9092027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2013 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Jan 25, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50083
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control apparatus includes a converter for converting an AC voltage to a DC voltage, a feed shaft motor inverter for converting the DC voltage to an AC voltage for a feed shaft motor, a main spindle motor inverter for converting the DC voltage to an AC voltage for a main spindle motor, a power outage detection unit for detecting a power outage of the AC power supply, a voltage detection unit for detecting the DC voltage, and a control unit which, upon power outage of the AC power supply side, outputs a feed shaft motor deceleration command to the feed shaft motor inverter and outputs, to the main spindle motor inverter, a main spindle motor acceleration command when a DC voltage is greater than an upper limit and a main spindle motor deceleration command when the DC voltage is less than a lower limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.