Homing and establishing reference frames for motion axes in radiation systems
US8692503B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Jun 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50038
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of homing motion axes in a radiation system uses a motor and one or more hardstops. A load is driven by a motor to move toward a hardstop during which an electrical parameter of the motor is monitored. A reference position for the motion axis is defined when the monitored electrical parameter reaches or exceeds a determined value. Alternative to monitoring the motor electrical parameter, the motor velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored motor velocity falls to or below a determined value. Alternatively, the load velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored load velocity falls to or below a determined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.