Sorting; Drum Suitability - Mepu Major 2000 User Manual

6. Sorting

The following sample procedures are the basic adjustments, according to the product to be
sorted. It is impossible to give precise adjustment instructions, because grains will vary
depending on the size of the grains, hectolitre weights, rubbish content, and pieces of straw. The
grain is fed to the machine using a pipe of Ø 200, maximum. When using a smaller pipe, e.g. Ø
160, it is recommended to use a converter.
1. The inclination angle of the drums is set to low.
2. The feed shut-off damper is closed.
3. The drums are started, and set at a low speed.
4. The fan is started, the intake air is adjusted to approximately mid-range. If the intake is
off, or too low, the feed roller's air gap can become blocked when the feeding of the grain
to the machine starts.
5. When the shut-off damper is open, grain is fed to the machine. At the same time, the
passage of the grain through the machine must be monitored.
6. The suction is increased up to a point when grains start flying out with the rubbish.
7. If the layer of grain becomes too big at one end, the feed is increased, and the drums are
gradually inclined more, so that the grain will proceed downwards quicker. If the
inclination is too great, the internal drum may grind on the feed pipe.
8. A suitable layer of grain on the lower level of the external drum would be 5 - 10cm. The
suitable rotation speed for grains is 10-15 r/min, for peas 10-12 r/min, when the worm
gear reducer change range is 7-22 r/min.
9. The rotating speed can be adjusted, in which case the width of the grain mass can be
adjusted. If the rotation speed of the drums is too high, the end result of the sorting will
be of lesser quality, and the cleaning will not be as efficient.
The basic setting for inclination is the top position for grains with hulls (barley / oats). Grains
without hulls (wheat): medium inclination. Inclination for rapeseed and peas: the bottom
position.
Please note! You may only adjust the variator when the machine is
running!

7. Drum suitability

The yearly differences in grain quality affect the selection of drums. The table below is for
recommendations only. Drums must be handled carefully so that they would not become dented.
External drum
2.0 x 15 mm
2.0 x 15 mm
2,0 x 15 mm
2.3 x 15 mm
2.5 x 15 mm
2.7 x 15 mm
Rapeseed drum 3 mm
Pea 5 x 30 mm
SS = seed sorting, CO = commercial, MB = malting barley
Internal drum Grain type
8 or 10 mm Oat
8 or 4 x 15 Barley, wheat, rye
5 x 30 mm Mixture of oat / pea
8/10 or 4 x 15 Oat, wheat, barley, rye
8-10 or 4 x 15 Barley, wheat
8 / 10 Barley
6, or 4 x 15 Rapeseed, canola
10 or 12 Pea
Type of sorting
SS
CO
CO
SS
MB / SS
MB / SS
CO
CO / SS
20