| 摘要 |
<p>PURPOSE:To provide a coordinate input device which can input plural pieces of tool force information and which can easily correct tool force information with respect to a phase angle without reducing a range where tool force can be detected. CONSTITUTION:A position indicator 2 having a tuning circuit where the center of a tuning frequency changes to one of the plural frequencies which are previously set in accordance with a switch operation, and the tuning frequency continuously changes with at least two of the plural frequencies as a center in accordance with tool force is used. The electric waves of the plural frequencies are transmitted to the position indicator 2. The electric wave reflected from the tuning circuit at that time is received, and the coordinate value of an indicating position and the phase angle are detected from the electric wave. Then, which is the tuning frequency of the tuning circuit is judged among the plural frequencies.</p> |
