发明申请
- 专利标题： Homing and Establishing Reference Frames for Motion Axes in Radiation Systems
- 专利标题（中）： 归位和建立辐射系统中运动轴的参考框架
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申请号： US12641538申请日： 2009-12-18
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公开(公告)号： US20110148339A1公开(公告)日： 2011-06-23
- 发明人: Robert T. Wiggers
- 申请人： Robert T. Wiggers
- 申请人地址： US CA Palo Alto
- 专利权人： Varian Medical Systems, Inc.
- 当前专利权人： Varian Medical Systems, Inc.
- 当前专利权人地址： US CA Palo Alto
- 主分类号： G05G5/04
- IPC分类号： G05G5/04
摘要：
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.