30°
52
English
11.4 Machine maintenance
11.4.1 Checking the blades
Sharp shred knives will give the machine optimum performance and provide maximum operating
speed. Enhance your own work comfort by taking some time to check the blades, and if neces-
sary, sharpen them.
SHARP BLADES = OPTIMUM PERFORMANCE
Pay particular attention to the following:
Shredding garden waste with the ELIET shredding system takes place
in two steps. We first have the contact of the blades with the garden
waste when chopping takes place where the cutting block can be
found. The wood and green material is roughly cut into pieces until
large irregular chippings are obtained during this
primary shredding
(1)
. These large chippings end up in the shredding chamber where
they are finely chopped to produce small chippings. This
secondary
shredding (2)
will continue until the chippings are considered to be
small enough to pass through the openings in the sieve screen or as
soon as they’re small enought to be ejected.
The chippings fall through the calibration sieve in the Axelero
TM
chamber (3) , where they are ejected as a result of the ‘axeleration’
effect via the blow chute (4).
Each of these shredding actions set certain criteria that the blades
must meet for an optimal shredding efficiency:
The top of the blade, in particular, is important with regard to the
primary shredding. Since the blades act as splitting blades, the cutting
angle is essential because this forms the key that will cleave through
the wood. The cutting angle of the cutting edge of the blade is by
preference 30°. The sharper the blade edge, the less resistance when
splitting and the smaller the cutting impact on the structure. This will
produce significantly fewer vibrations and noise. This will also benefit
the load on the blade shaft and the bearings. You can ensure that the
cutting angle is the best possible at all times by regularly grinding.
(read “11.4.2 Sharpening the blades” on page 53)