| 摘要 |
<p>In the system, a computer controls the height of the lift and tilt of the mast. The program adjusts the height and tilt on data recovered from a store. A controller (100) receives information from a lift height sensor (57) and tilt limit switches (82,83). These read respectively from the height of a lift (having a cylinder (6) and a fork (8)) and the inclination of a tilt cylinder (5). The controller (100) controls lift and tilt actuators (90,93) which respectively operate hydraulic valves (91,94) driven from a pump (92). When an engine key is turned on for starting the engine, the display panel of the control board displays zero. When fork is raised, a clutch of the lift actuator is engaged and voltage applied to a motor is gradually increased by voltage controller. Motor operates the lift valve.</p> |
