| 摘要 |
PURPOSE:To execute correctly and exactly positioning of an original point, by providing a device for detecting in which turning area of positive or negative a rotating body exists against an intermediate turning position set in advance, in addition to a device for detecting an original point position of the rotating body against the body. CONSTITUTION:When it is decided to be the first positioning after an electric power source is turned on, whether an output signal of a switch SW1 is logic ''1'' or ''0'' (namely on or off) is deciced. As a result, in case when projections 12, 19 are in a full line position and also an operating body 13 is in a turning position of a full line, an output signal of the switch SW1 is logic ''0'', and consequently a turning position of a rotating body 5 against a truck 1 is in the negative direction, a command is outputted to a motor M3 in order to turn the rotating body 5 at a high speed in the positive direction, and the rotating body 5 is turned until the output signal of the switch SW1 is varied to logic ''1''. On the contrary, in case when the operating body 13 is in a turning position of a chain line, SW1 is ''1'', and it is known that the turning position of the rotating body against the truck 1 exists in the positive direction turning area. |
