User Manual

TIC LEXION 500 Electric System
03/05 Lex-e-22a 22a-3
Description of function:
1/2
Reel variable-speed drive The hydraulic reel speed control is realised using a variable displacement-
type axial piston pump. The pump drive and therefore the sense of
rotation depends on the front attachment. A CAN signal is transmitted to
the reel controller module (A16) by the +/- pushbuttons provided that the
function pre-selection rotary switch (T11) is set to the reel symbol. Module
(A16) now actuates the solenoid coils (Y95 or Y96) using pulse-width
modulation, depending on the required swivel angle of the variable
displacement pump. The sensor (B73) transmits the swivel angle of the
variable displacement pump to module (A16).
Note: After shutting down the front attachment, the reel speed slow
solenoid valve (Y96) is energised for another 4 seconds in order
to fully retract the ram in the reel drive control hydraulic cylinder
(356) (zero displacement of pump). The accumulator (512) also
supports this process.
Front attachment
identification
The axial piston displacement pump is adjusted only if the cutterbar or
maize picker with hydraulic down maize augers is engaged and activated.
Front attachment identification is by means of reel controller module (A16)
on pin 17. If a corresponding front attachment is identified, upon engaging
the front attachment the pump swings to the position it had before it was
shut down the last time, but at least to 1.2 Volt signal voltage of the reel
speed control variable displacement pump sensor (B73). This
corresponds to a reel speed of approx. 3.5 km/h (± Offset).
When working without a front attachment or with another non-identified
front attachment, there is no adjustment of the axial piston displacement
pump. It remains in its basic position.
Reverser drive When the reversing function is active, a signal is connected to the reel
controller module (A16) which makes the speed adjustment variable
displacement pump swing to maximum delivery – circuit diagram 17a.
Automatic reel speed Automatic reel speed control is assumed by the reel controller module
(A16) which receives the necessary information about the vehicle's
ground speed via the CAN bus connection with the fieldwork computer
module (A10). The reel speed (B17) is now adjusted according to the
ground speed and the differential speed set value on the CEBIS terminal
(A30).