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Figure 152 Sub-screen “Steering sensitivity calibration”
The sub-screen “Steering sensitivity calibration” is used to finish the commissioning
of three parameters, namely “Left take-off voltage”, “Right take-off voltage” and
“Steering sensitivity”.
5.5.4.1
Calibrate Left & Right take-off Voltage
The value of left/right take-off voltage means that when the voltage applied to the
left/right drive port of the hydraulic valve is less than this value, the guide wheel of
the tractor keeps standstill and does not turn; when the voltage applied to the left/right
drive port of the hydraulic valve is more than this value, the guide wheel of the tractor
start to turn left/right slowly.
The hydraulic steering systems of different tractors are different in terms of machine
conditions, pressure of power steering pump, steering gear wear, oil cylinder leakage,
mechanical gap etc. Therefore the value of left/right take-off voltage has to be
calibrated based on the characteristics of each vehicle. Based on our experience, the
typical value for left take-off voltage and right take-off voltage is usually 2.3V (i.e.
the default left/right take-off voltage displayed when the sub-screen “Steering
sensitivity calibration” is opened) and the usual commissioning range is 2.0V~2.8V.
The difference between left and right take-off voltage usually is no more than 0.3V
after the commissioning.
The calibration is done as follows. Keep the tractor stationary at flat cement road
surface, pitch road surface or farmland etc.; start the engine and maintain a speed of
