Lemken automatic depth wheel pressure adjustment

The new automatic depth wheel pressure adjustment on Lemken seed drills aims to ensure that seeds are placed correctly, regardless of soil type (heavy or light) and regardless of variations in forward speed.
This innovation was awarded a DLG silver medal at the Agritechnica show 2011.

Without any change in depth wheel pressure, the OptiDisc double-disc seeding units, mounted on a parallelogram, sink in slightly deeper when moving from heavy soil to light soil.

In addition, this deeper penetration increases the pressure on the depth wheel. The reverse happens when they move from an area of light soil to an area of heavier soil. This results in variations in seed placement depth and in the intensity of reconsolidation by the press wheel.

With the new patented Lemken automatic depth wheel pressure adjustment, the desired pressure is first set on the control terminal of the seeding combination.

During work, a sensor then continuously monitors the pressure on the press wheel.

If this pressure changes as a result of a change in speed or soil type, the automatic depth wheel pressure adjustment system reacts immediately.

The reconsolidation pressure of the press wheel is kept at a constant level by means of the central hydraulic depth wheel pressure adjustment. As a result, the penetration depth of the depth wheel also remains constant, as does the seedbed for the seeds.

According to Lemken, these functions ?optimize sowing quality. The operator's task is also made much easier, as there is no need to adjust the depth wheel pressure manually.

In addition to autonomous depth wheel pressure adjustment, this new system can also transmit data for GPS guidance and comply with it. Furthermore, no location data needs to be entered beforehand.?

The measurement signal sent to the depth wheel can also be used to modulate seeding rate and harrow pressure.