发明名称 |
Spot facing method and apparatus for printed circuit board |
摘要 |
A spot facing method and apparatus for processing a printed circuit board incorporates a sensing device having a sensor probe capable of sensing the level of the surface of a printed circuit board, another sensing device for sensing the position of the end of a tool, measuring circuits for measuring the distance between the sensing probe and the end of the tool and the distance between the surface of the printed circuit board and the end of the tool in accordance with the signals from the sensing devices, and a controller connected to the measuring circuits so as to control the feed of the tool thereby attaining a high dimensional precision in the depthwise direction in the spot facing.
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申请公布号 |
US5094574(A) |
申请公布日期 |
1992.03.10 |
申请号 |
US19900585972 |
申请日期 |
1990.09.21 |
申请人 |
HITACHI SEIKO LTD. |
发明人 |
NISHIGAI, MASAO;OTANI, TAMIO;KANAYA, YASUHIKO |
分类号 |
B23Q15/013;B23B41/00;B23K26/02;B23Q15/24;H05K1/02;H05K3/00 |
主分类号 |
B23Q15/013 |
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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