| 摘要 |
PURPOSE:To prevent the occurrence of unexpected setting and releasing by using a system in which only when one of switches for left-side setting, right-side setting and deviation correcting is operated by pushing, an action command is given to a setter or a deviation corrector. CONSTITUTION:A controller 13 for a microcomputer, which gives automatically commands through a control valve 10 for turning direction and speed of a slewing base on the basis of information from an operating condition sensor 7 attached to a slewing operation lever 6, is provided. Both left- and right-side setting switches (b) and (c) for left- and right-handed setters 12A and 12B are provided for an operating panel and a deviation correcting switch (a) for a deviation corrector 15 is also adjacently set. Only when one of the three switches (a). (b) and (c) is operated by a judger 23, the setters 12A and 12B or the corrector 15 is operated. The trouble to be occurred when two or more switches are operated erroneously can thus be prevented.
|
