Control system for working machine having boom

Details Control system for working machine having boom Control system for working machine having boom

G - Physics

05

D

341/98

G05D 3/12 (2006.01) B62D 1/18 (2006.01) E02F 3/43 (2006.01) E02F 3/96 (2006.01) E02F 9/20 (2006.01)

Patent

CA 1334996

A control system for a working machine which has a boom equipped with a working implement at its forward end and pivoted to a vehicle body movably about a vertical axis, and control valve for controlling the movement of the boom. The system comprises a variable resistor for setting a target position where the boom is to be stopped to produce a setting signal, a sensor for detecting the moved position of the boom to produce a detection signal, diffferential device for determining the difference between the setting signal and the detection signal to produce a difference signal, a detector for detecting the direction of movement of the boom from the magnitude of the difference signal, a pulse- width modulator for subjecting the difference signal to pulse-width modulation to produce a pulse signal, and a driver for driving the control valve by the pulse singal in the detected direction in proportion to the difference signal.

562214

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