| CPC A01G 23/003 (2013.01) [B60P 1/5433 (2013.01); B60P 3/41 (2013.01); B66C 13/085 (2013.01); B66C 1/585 (2013.01)] | 15 Claims |

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1. An arrangement for controlling unloading of a forestry machine, the forestry machine comprising:
a load space for timber load,
a boom structure,
a wood-handling tool attached to said boom structure,
a control system and a measuring apparatus of the forestry machine,
wherein said measuring apparatus is arranged to measure a position of the forestry machine and a rotation angle of the boom structure, and a position of single boom parts of the boom structure and a position of the wood-handling tool, and
wherein said control system is arranged:
to define and note down a location of a timber pile,
to calculate and note down a position of an edge of the timber pile,
to control the wood-handling tool to pick a timber bundle from the timber load,
to allow a driver and/or the control system to justify the timber bundle against a load screen,
to calculate a distance of an end justified to a load screen of said timber bundle from the wood-handling tool,
to calculate an unloading place for said timber bundle in the location of timber pile defined for the timber pile, and
to control and unload said timber bundle in said calculated unloading place in the timber pile with said control system, and said measuring apparatus of the forestry machine such that one edge of the timber pile becomes even and straight.
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