AE50 AWARD 2011, INNOVATION GOLD MEDAL AGROSALOON 2010, TECHNICAL INNOVATION FIMA 2010, SILVER MEDAL AGRITECHNICA 2009
DEALING WITH LONGITUDINAL SLOPES:THE OPTI-FAN™ SYSTEM BLOWING PRECISION
The multi award-winning Opti-Fan™ system consists of a simple yet very effective way of correcting fluctuations in the speed grain flow across the cleaning shoe. Whether working up-hill or down-hill, the fan speed automatically adapts to the direction and to the degree of the slope.
The Opti-Fan™ system takes combine performance on slopes to the next stage, with automatic compensation for continuous uphill or downhill gradients.
When driving downhill, material moves against gravity and therefore more slowly over the grainpan and top sieve, causing it to remain longer in the cleaning shoe and the layer thickness to increase. More ‘material other than grain' (MOG) remains in the cleaning shoe as the set cleaning fan speed is insufficient to clear the crop. Driving uphill causes the material layer to decrease as it moves more quickly out of the shoe under gravity. The air flow from the fan is too high for the thin layer of material which results in the material travelling too quickly over the top causing increased grain losses.
The fan speed control system senses the combine’s angle of ascent or descent and automatically adjusts the cleaning fan speed to compensate. The operator sets the level-field fan speed and the system reduces the speed when travelling uphill and increases it downhill to optimise the material layer thickness on the cleaning shoe. No extra work is required from the driver and losses are reduced and the grain sample is improved.