3.4 ELEVATOR AND SUB CONVEYOR
3.4.1 Settings
The speed of the elevator belt and the sub conveyor may be changed from the display unit, on the machine
settings page.
3.5 CHAMBER
The bale chamber can handle high loads, but the set chamber pressure and the resulting bale density must
be considered and possibly limited according to type of material. When baling certain material, too high
chamber pressures may reduce the bale chamber life time. See and section 0.0.1 "Settings and explan-
ations" for how to set the chamber pressure.
NOTE: All references to valves found in this sub chapter can be found in the hydraulic schematic and valve over-
view in chapter 11 "Hydraulics"
3.5.1 Opening speed settings
Closing speed: Adjusting the bale chamber closing speed is done by turning the K1 valve. Clockwise
decreases the speed. Counterclockwise increases the speed.
Default setting: Close the valve and then open 1/2 turn.
3.5.2 Chamber pressure settings
The chamber pressure settings is set on the display unit. When the baling starts, the elevator will run at its
higher set speed. When the chamber pressure surpasses the elevator slow threshold, the speed is reduced
in order to allow a higher bale density. The bale is done when set maximum chamber pressure is reached.
The plastic tying unit will then start.
Parameters that may be set on the display unit are:
Chamber max pressure: 100 - 280 bar
Elevator slow threshold: 30 - 100% of set pressure
Example:
Material: Wood chips
Set chamber pressure: 180 bar
Chamber slow threshold: 75 %
When the chamber pressure sensor registers a pressure of 135 bar (75 % of 180 bar) , the elevator speed is
reduced. The elevator will maintain the low speed until a chamber pressure of 180 bar is reached. Then the
plastic tying starts automatically.
IMPORTANT: The chamber pressure must never exceed 280 bar!
3.6 PLASTIC TYING UNIT
3.6.1 Principle of operation
Laying net or film on the bale in the chamber is done by the plastic tying unit on the top of the machine.
When set maximum chamber pressure is reached, a set amount of net/film is fed into the chamber by the
feed rollers in the plastic tying unit. When the “tail” is long enough, it is grabbed by the bale and pulled. The
feed rollers stop and open, so that the net/film spreads on the bale. The feed rollers allow the net/film to
spread over the whole width of the bale. The brake engages and puts tension on the net/film. The bale is now
laid with a predefined number of layers of net/film. Afterwards, the feed rollers close again and the net/film
is cut by the knife. Finally, the chamber door opens and the bale is transported to the wrapper by the sub
conveyor. The chamber closes again and the baling resumes while the wrapper starts.
3 SETTINGS AND HYDRAULIC ADJUSTMENTS 23
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