11 September 2015, 15:17
After receiving the Agritechnica gold medal for the “EMC” electronic mass flow control and regulation system for twin-disc fertiliser spreaders in 1999, RAUCH now presents a new generation of the first fully automatic metering system in the world with separately controlled left and right fertiliser spreader metering slide.
In contrast to weighing with weigh cells used in classical weighing spreaders, AXIS EMC controls the fertiliser flow separately for both metering slides. EMC verifiably increases metering precision.
The success of the EMC automatic metering system for hydraulically driven AXIS-H fertiliser spreaders is based on the following physical basis: The drive torque of the spreading discs is proportional to the fertiliser flow rate at the metering slide.
In previous EMC fertiliser spreaders, the drive torque of the spreading discs was still determined by oil pressure sensors and rev counters. The new AXIS.2 H EMC-2 generation works with state-of-the-art, contact-free hightech sensors at both spreading disc drive shafts. RAUCH uses magnetostriction speed measurement modules which have been tried and tested thoroughly in the drives of E bikes or Segway personal transporters. The simple functional principle: The magnetic field of the spreading disc drive shafts changes under load. The change of the magnetic field is measured in a contact-free manner and converted into a precise torque signal. EMC-2 enables precise measurement and control of the flow rate every 2 seconds with a precision of plus/minus one percent.
The new EMC-2 automatic metering system has made precise fertiliser metering even simpler, more comfortable and safer. EMC-2 calibrates itself fully automatically within a short time after the start of work. Additional calibration processes, the so-called adaptive idle measurements, are only performed by the system if the operating conditions change significantly. Influences of the oil temperature on the EMC sensor technology are now a thing of the past. Since the new EMC sensors measure the torque and the spreading disc speed at the same time in a contact-free manner, the technical expenses regarding design and maintenance have been significantly reduced. With EMC-2, the user friendliness, precision, operational safety and the economic efficiency of the entire system have been optimised.
Source: RAUCH Landmaschinenfabrik Gmb