发明名称 |
Tool setting or analysis device with backup or repeated trigger signal for detecting a tool |
摘要 |
A tool setting or tool analysis device for a machine tool comprises a light source for producing a light beam. A light receiver receives the light beam and produces a signal indicative of the amount of light received. This is analyzed by a main analysis circuit to generate a trigger signal to a machine controller when the beam is at least partially occluded. To provide fail-safe operation should the main circuit not recognize the tool, a back-up trigger signal is produced after a delay by a delay circuit. In one preferred form, the back-up trigger signal may oscillate, providing repeated edges which can ensure fail-safe operation even if the machine controller suffers from a blind window and therefore misses the initial trigger signal. |
申请公布号 |
US8530823(B2) |
申请公布日期 |
2013.09.10 |
申请号 |
US20080450899 |
申请日期 |
2008.05.02 |
申请人 |
EGGLESTONE EDWARD BENJAMIN;MARSHALL DEREK;MERRIFIELD BENJAMIN JASON;RENISHAW PLC |
发明人 |
EGGLESTONE EDWARD BENJAMIN;MARSHALL DEREK;MERRIFIELD BENJAMIN JASON |
分类号 |
G06M7/00;H01J40/14 |
主分类号 |
G06M7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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