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Farmer 400
Fav 700
Fav 900
Power lift / Electrohydraulic control EPC
Operation and control conditions of EPC-C
A
General
Fav 900 chassis number 23/3001 and up
11.04.2001
8610
000003
A
a
1/5
Capitel
Docu-No.
Index
Date
Version
Page
Operation and control conditions of EPC-C
Text-module
Working with EPC-C ECU (A005)
Position control
The controlled variable is the position of the lift assembly relative to the tractor and thus the working
depth of the mounted implements.
The "Position" sensor B030 , which monitors the position of the lifting shaft, supplies the actual value.
Text-module
Draft force control
The controlled variable is the draft force at the bottom link. If this is kept constant, the tractor power is
used to the optimum extent, for example when ploughing on rolling terrain and in non-homogeneous
soil.
The actual value of the "KMB" draft-sensing pin B031 / B032 is the change in the voltage in the signal
line. This is caused by the change in the magnetic field in the draft-sensing pin when subjected to
tensile or compressive loads by the bottom links in a horizontal plane.
The draft force is corrected by changing the working depth of the mounted implement (e.g. plough).
Text-module
Hybrid control
The actual value of the position and draft force is mixed in an adjustable ratio at the Vario terminal A008
and processed as the controlled variable.
The hybrid control enables changes in the working depth resulting from varying soil resistances, as
occur when using pure draft control, to be reduced.
Text-module
Floating position
In this the setpoint working depth is set to the max. working depth (item 10) on the control console
A004 .
The position and draft force actual values are not processed as controlled variables. The height of the
lift arms is maintained by the self-supporting implement.