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3. Adjust the spring-loaded device (C) of the "grain
shutter", so that the shutter will not open until there
is grain throughout the width of the shutter. This may
be checked through the inspection window (2) on
the sides.
Loosen the thumbscrew, push to the desired posi-
tion and tighten. As a starting point, the handle
should be placed in the middle for wheat and barley.
For lighter crops, move the thumbscrew to the left,
and for heavier crops, move the screw to the right.
When the cleaner is running, the crop is checked
according to the illustration.
The spring load device determines how long the
grain remains in the aspiration chamber.
4. Adjust the air slot in the aspiration cleaner using the
handle (D), to avoid extraction of too many whole
grains. Loosen the thumbscrew, push to the desired
position and tighten.
This may be checked as follows
4.1 If there are many whole kernels in the
screenings, they will produce noise in blower and
pipeline.
4.2 Collect the screenings after the dust
cyclone and check that there are not too
many whole kernels.
4.3 The screenings can also be inspected
through the window on the back of the
aspiration cleaner.
5. When handling light crops, too many whole kernels
may be extracted, although the aspiration
cleaner is set to minimum extraction. In such cases,
open the damper (A) a little.
Control of cleaning / sorting efficiency
After the initial adjustment of the cleaner, and operation
at the capacity stated for two or three minutes, samples
should be taken to check if the desired final result has
been achieved.
Sampling can be done at the opening (E).
Loosen the thumbscrew, push the damper to the left
and extract the sample through the opening. Beware of
sharp edges, and remember to close the shutter after
finishing sampling.
If the cleaner is used for sorting, it is required that there
is a certain size difference between the two crops that
are to be sorted.
If the sorting between the two crops is too low, reduce
the capacity, and if it is too high, increase the capacity.
As crops will vary, however, it will be wise to allow for a
minor safety margin.
If the capacity is changed, new samples will have to be
taken. Continue this way until the desired grading result
of the finished product has been obtained. When the
correct capacity setting has been reached, it is recom-
mended to deliver a sample of the finished product to
the feedstuff dealer for testing, as the test screens are
intended as a guide only.
B
C
E
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