| 摘要 |
PURPOSE: An automatic horizontal state adjusting device for a laser horizontal system is provided to horizontally maintain the laser horizontal system by selectively driving two servo motors based on a gradient value of X-axis and Y-axis sensors. CONSTITUTION: An automatic horizontal state adjusting device for a laser horizontal system(59) includes X-axis and Y-axis sensors(63,64), an amplifier(65), a microcomputer control section(67) and a motor driving section(68). The X-axis and Y-axis sensors(63,64) are installed in the laser horizontal system(59) positioned below a table(62) so as to detect the gradient in X-axis and Y-axis directions of the laser horizontal system(59). The gradient value in X-axis and Y-axis directions of the laser horizontal system(59) is amplified to a predetermined level by means of the amplifier. The microcomputer control section(67) analyzes the gradient value so as to determine a horizontal state of the laser horizontal system(59). The motor driving section(68) adjusts the laser horizontal system(59) such that the laser horizontal system(59) is maintained in the horizontal state.
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