
30
MicroController Control System
Systems Operation
This control panel accept a analog lift control signals
and tilt/aux lever signals. The analog voltage is
controlled by valve control card (1) mounted at the top
of the control valve.
The valve control card uses a hall-effect transducer
(LIFT SENSOR) and a magnet to sense lift lever
movement. The closer the magnet is to the
transducer the greater the hydraulic pump motor
speed.
Location of Components
(2) Lift Sensor. (3) Magnet.
2
LIFT SPOOL
3
When the operator pulls the lift lever, magnet (3)
moves closer to the lift sensor (2). The sensor
detects the increasing magnetic field and sends an
increasing voltage to the valve control card. The
valve control card produces voltage changes which
input to the logics at PC-1. The logics uses these
changing voltages to determine what speed to
operate the pump motor. The logics then controls the
pump transistor TP.
Lift Control Circuit
1
Location of Components
(1) Valve control card.
Содержание B20S-3
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