McHale Fusion Vario Baler & Wrapper
101
8.2.1 Determining the number of wrapping ring rotations
Extra care, regarding the amount of wrapping ring rotations must be taken when
wrapping bales with the Fusion Vario. This is because of the following reasons and
these should always be taken into account when deciding the number of wrapping ring
rotations to apply:
1. It is a variable diameter baler, and so each time the bale size is changed, the
no. of wrapping ring rotations must also be changed.
2. Variable conditions of the forage material being baled will give variations to the
bale size for wrapping. i.e. higher % DM in the forage will usually give slightly
larger diameter bales when compared to low DM forage. The best way to
resolve this is to apply extra net in the baler in order that the bale size is
maintained.
3. Bales from the Fusion Vario are usually more dense, than bales of the same
size from a typical fixed chamber eg. roller baler and because of this extra
weight, a minimum of 6 layers of wrapping film must be applied. Where bales,
regardless of size are likely to exceed 1,000 kg in weight, then 8 layers of
wrapping film are recommended.
4. Also with this extra bale weight, consideration must be given, firstly, to the
handling machinery and secondly, to the distance, the wrapped bales are to be
transported. It is much more difficult to safely handle, without damaging the
film, bales of 1,000 kg + compared to more typical 800 kg bales. Where either
of the above conditions are not ideal, then an extra 2 film layers must be
applied, and then check at the bale stack for any signs of damage to the film
on the bale.
5. It is important to note that for high density bales, bale weight does not decrease
when baling high %DM forage (eg. 50%DM) when compared to low %DM
forage (eg. 25%DM).So it cannot be assumed that because the forage is
higher %DM in one field compared to another, that it is safe to reduce the
number of layers. Bale weights could still be + 1,000 kg, and so the extra layers
of film will still be required.
To determine the number of wrapping ring rotations required to cover a bale, carry out
the following procedure:
1. Using manual operation, from the control box, manually count the number of
wrapping ring rotations to cover the bale completely with plastic film
2. Add 0.5 to this number
3. Multiply the resultant figure by 3 (for 6 film layers), 4 (for 8 film layers), 5 (for 10
layers), 6 (for 12 layers), etc
4. Round up to the next full number if the result contains a fraction of a full number
Example:
Number of ‘Wrapping ring rotations’ to cover bale: 3.5 = (x)
Number of rotations to apply 6 layers of film to bale = (3.5 + 0.5) x 3 = 12
Important Notes:
(x) ‘Wrapping ring rotation’ = both dispensers rotating 360° around the bale.
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