Krone 1022623 - Checking the Tension of the Inserted Film

Operation 8
Net and chamber film wrapping 8.16
Comprima F 155
Original Operating Instructions 150001049_01_en 91
8.16.4 Checking the tension of the inserted film
The round bale must be tied with the appropriate film tension. KRONE recommends a pre-
tension of 5-15%. You can check whether this pre-tension of 5-15% has been obtained as
follows.
X
1
2
RP000-024
ü A round bale is pressed with chamber film wrapping and set down in the field.
ü The machine is shut down and safeguarded, refer to page27.
 Use a marker pen to draw 2 horizontal lines(1) on the film at a distance of X=100mm.
 Cut out the section(2) around the 2 lines which you have drawn. Ensure that you cut out all
film layers.
 Allow all film layers of the cut-out section(2) to rest for at least 3minutes.
 Measure the distanceX between the lines(1) which you have drawn.
Æ If the distanceX is between 86 and 95mm, the pre-tension has been correctly set.
Measured value
X
Pre-tension Evaluation
<86 mm >15% The pre-tension is too strong. Reduce the brake force
on the wrapping material brake, refer to page169.
86mm 15% Correct
95mm 5% Correct
>95mm <5% The pre-tension is too weak. Increase the brake force
on the wrapping material brake, refer to page169.
INFORMATION
KRONE recommends 3.5-4 film layers to ensure optimum chamber film wrapping, refer to
page134. The minimum required film layers depend on the condition of the crops.
For round bales with a diameter greater than 130cm and/or very dry or very wet crops,
KRONE recommends using at least one additional film layer.